TY  - CONF
AU  - Spasojević, Pavle
AU  - Savić, Sanja
AU  - Panić, Vesna
AU  - Spasojević Savković, Milica
AU  - Marković, Maja
AU  - Pantić, Olga
AU  - Popović, Ivanka
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6975
AB  - Emerging efforts in the field of biocomposites established novel combinations of biobased matrix materials and reinforcements, as well as the optimization of curing conditions, to enhace their properties and expand their range od applications. The curing conditions of nanocellulose reinforced biobased unsaturated polyester reins (UPR) based on itaconic acid and it derivatives were examined in this work. Since the curing process of biobased UPR required the presence of both initiatior and an activator, the optimization was conducted in two phases. The first phase investigated the effect of different concentrations of an activator, cobalt octoate, (0.5, 1.0 and 1.5 mass%) with a constant concentration of an initiator, a mixture of dibenzoyl peroxide (DBP) and methyl ethyl ketone peroxide (MEKP) (DBP to MEKP ratio 1.5:1.0, 2.5 mass% total). The ratios of DBP and MEKP were varied in the second phase of experiments in the following manner: 2.5:0, 1.75:0.75, 0.75:1.75 and 0:2.5 (keeping the total initiator mass% of 2.5). The effect of the different curing conditions on the UPR properties was monitored via the gel content analysis and the uniaxial tensile test. It was shown that the increase in activator concentration led to the decrease in gel content, tensile strenght and elongation at break. On the other hand, the increase in dibenzoyl peroxide concentration in the initiator mixture revealed enhanced overall mechanical properties. The optimal curing conditions were found to be 0.5 mass% of activator, and 1.75:0.75 DBP to MEKP ratio in the initiator mixture. Thereby obtained UPR biocomposite showed a significant increase in elastic attributes suggesting that these materials can be used where high elasticity is needed.
PB  - Nice, France : Université Côte d’Azur, University of the French Riviera
C3  - Book of Abstracts - 29thPolyChar - World Forum on Advanced Materials, 26 - 29 September 2023, Nice, France
T1  - Optimization of Curing Conditions for Nanocellulose Reinforced Biobased Unsaturated Polyester Resin
SP  - 56
EP  - 56
UR  - https://hdl.handle.net/21.15107/rcub_cer_6975
ER  - 

@conference{
author = "Spasojević, Pavle and Savić, Sanja and Panić, Vesna and Spasojević Savković, Milica and Marković, Maja and Pantić, Olga and Popović, Ivanka",
year = "2023",
abstract = "Emerging efforts in the field of biocomposites established novel combinations of biobased matrix materials and reinforcements, as well as the optimization of curing conditions, to enhace their properties and expand their range od applications. The curing conditions of nanocellulose reinforced biobased unsaturated polyester reins (UPR) based on itaconic acid and it derivatives were examined in this work. Since the curing process of biobased UPR required the presence of both initiatior and an activator, the optimization was conducted in two phases. The first phase investigated the effect of different concentrations of an activator, cobalt octoate, (0.5, 1.0 and 1.5 mass%) with a constant concentration of an initiator, a mixture of dibenzoyl peroxide (DBP) and methyl ethyl ketone peroxide (MEKP) (DBP to MEKP ratio 1.5:1.0, 2.5 mass% total). The ratios of DBP and MEKP were varied in the second phase of experiments in the following manner: 2.5:0, 1.75:0.75, 0.75:1.75 and 0:2.5 (keeping the total initiator mass% of 2.5). The effect of the different curing conditions on the UPR properties was monitored via the gel content analysis and the uniaxial tensile test. It was shown that the increase in activator concentration led to the decrease in gel content, tensile strenght and elongation at break. On the other hand, the increase in dibenzoyl peroxide concentration in the initiator mixture revealed enhanced overall mechanical properties. The optimal curing conditions were found to be 0.5 mass% of activator, and 1.75:0.75 DBP to MEKP ratio in the initiator mixture. Thereby obtained UPR biocomposite showed a significant increase in elastic attributes suggesting that these materials can be used where high elasticity is needed.",
publisher = "Nice, France : Université Côte d’Azur, University of the French Riviera",
journal = "Book of Abstracts - 29thPolyChar - World Forum on Advanced Materials, 26 - 29 September 2023, Nice, France",
title = "Optimization of Curing Conditions for Nanocellulose Reinforced Biobased Unsaturated Polyester Resin",
pages = "56-56",
url = "https://hdl.handle.net/21.15107/rcub_cer_6975"
}

Spasojević, P., Savić, S., Panić, V., Spasojević Savković, M., Marković, M., Pantić, O.,& Popović, I.. (2023). Optimization of Curing Conditions for Nanocellulose Reinforced Biobased Unsaturated Polyester Resin. in Book of Abstracts - 29thPolyChar - World Forum on Advanced Materials, 26 - 29 September 2023, Nice, France
Nice, France : Université Côte d’Azur, University of the French Riviera., 56-56.
https://hdl.handle.net/21.15107/rcub_cer_6975

Spasojević P, Savić S, Panić V, Spasojević Savković M, Marković M, Pantić O, Popović I. Optimization of Curing Conditions for Nanocellulose Reinforced Biobased Unsaturated Polyester Resin. in Book of Abstracts - 29thPolyChar - World Forum on Advanced Materials, 26 - 29 September 2023, Nice, France. 2023;:56-56.
https://hdl.handle.net/21.15107/rcub_cer_6975 .

Spasojević, Pavle, Savić, Sanja, Panić, Vesna, Spasojević Savković, Milica, Marković, Maja, Pantić, Olga, Popović, Ivanka, "Optimization of Curing Conditions for Nanocellulose Reinforced Biobased Unsaturated Polyester Resin" in Book of Abstracts - 29thPolyChar - World Forum on Advanced Materials, 26 - 29 September 2023, Nice, France (2023):56-56,
https://hdl.handle.net/21.15107/rcub_cer_6975 .

TY  - JOUR
AU  - Panić, Vesna
AU  - Jovanović, Jelena
AU  - Popović, Ivanka
AU  - Savić, Sanja
AU  - Marković, Maja
AU  - Spasojević, Pavle
AU  - Adnadjević, Borivoj
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5713
AB  - High concentrations of hydrophobic MFI zeolite (26.0–51.3 wt%) were successfully embedded in poly(methacrylic acid) (PMAA) network in simple, one-pot synthesis of PMAA-MFI composite hydrogels. The effects of zeolite concentration regarding pure PMAA xerogel, for all of the investigated properties (primary structural parameters, morphological properties, water swelling ability, thermal degradation mechanism and stability, and mechanical properties) were determined and discussed. The PMAA-MFI composite hydrogels had remarkably higher density than PMAA xerogel (1660/1420 kg m−3), higher crosslinking density (29/1.0 × 10−4), improved mechanics in the dry and swollen state (up to 4.9 times higher storage modulus) and lower swelling degree (42/420 g g−1), average molar mass between the network crosslinks (3.6/110 × 104 g mol−1), and distance between the macromolecular chains (64/710 nm). Despite high zeolite concentration, the composites kept porous hydrogel structure with uniformly dispersed zeolite particles. FTIR spectra disclosed the existence of functional groups of PMAA network and MFI zeolite that interacted mutually and led to increased crosslinking density. The effect of zeolite concentration on the thermal degradation mechanism was established. The composition-properties correlations were determined and described by the adequate linear or power law equations revealing the additive nature of the composites and the fractal structure of the networks. These correlations enable the achievement of desired properties by simple adjustment of the initial composition, i.e. zeolite concentration. Therefore, this work presents the base for further development of tailor-made PMAA-MFI composite hydrogels aimed for specific application.
PB  - Elsevier
T2  - Polymer
T1  - The study of composition-properties relationships for composite hydrogels based on poly(methacrylic acid) and high concentrations of MFI zeolite
VL  - 269
SP  - 125750
DO  - 10.1016/j.polymer.2023.125750
ER  - 

@article{
author = "Panić, Vesna and Jovanović, Jelena and Popović, Ivanka and Savić, Sanja and Marković, Maja and Spasojević, Pavle and Adnadjević, Borivoj",
year = "2023",
abstract = "High concentrations of hydrophobic MFI zeolite (26.0–51.3 wt%) were successfully embedded in poly(methacrylic acid) (PMAA) network in simple, one-pot synthesis of PMAA-MFI composite hydrogels. The effects of zeolite concentration regarding pure PMAA xerogel, for all of the investigated properties (primary structural parameters, morphological properties, water swelling ability, thermal degradation mechanism and stability, and mechanical properties) were determined and discussed. The PMAA-MFI composite hydrogels had remarkably higher density than PMAA xerogel (1660/1420 kg m−3), higher crosslinking density (29/1.0 × 10−4), improved mechanics in the dry and swollen state (up to 4.9 times higher storage modulus) and lower swelling degree (42/420 g g−1), average molar mass between the network crosslinks (3.6/110 × 104 g mol−1), and distance between the macromolecular chains (64/710 nm). Despite high zeolite concentration, the composites kept porous hydrogel structure with uniformly dispersed zeolite particles. FTIR spectra disclosed the existence of functional groups of PMAA network and MFI zeolite that interacted mutually and led to increased crosslinking density. The effect of zeolite concentration on the thermal degradation mechanism was established. The composition-properties correlations were determined and described by the adequate linear or power law equations revealing the additive nature of the composites and the fractal structure of the networks. These correlations enable the achievement of desired properties by simple adjustment of the initial composition, i.e. zeolite concentration. Therefore, this work presents the base for further development of tailor-made PMAA-MFI composite hydrogels aimed for specific application.",
publisher = "Elsevier",
journal = "Polymer",
title = "The study of composition-properties relationships for composite hydrogels based on poly(methacrylic acid) and high concentrations of MFI zeolite",
volume = "269",
pages = "125750",
doi = "10.1016/j.polymer.2023.125750"
}

Panić, V., Jovanović, J., Popović, I., Savić, S., Marković, M., Spasojević, P.,& Adnadjević, B.. (2023). The study of composition-properties relationships for composite hydrogels based on poly(methacrylic acid) and high concentrations of MFI zeolite. in Polymer
Elsevier., 269, 125750.
https://doi.org/10.1016/j.polymer.2023.125750

Panić V, Jovanović J, Popović I, Savić S, Marković M, Spasojević P, Adnadjević B. The study of composition-properties relationships for composite hydrogels based on poly(methacrylic acid) and high concentrations of MFI zeolite. in Polymer. 2023;269:125750.
doi:10.1016/j.polymer.2023.125750 .

Panić, Vesna, Jovanović, Jelena, Popović, Ivanka, Savić, Sanja, Marković, Maja, Spasojević, Pavle, Adnadjević, Borivoj, "The study of composition-properties relationships for composite hydrogels based on poly(methacrylic acid) and high concentrations of MFI zeolite" in Polymer, 269 (2023):125750,
https://doi.org/10.1016/j.polymer.2023.125750 . .

TY  - JOUR
AU  - Marković, Maja D.
AU  - Spasojević, Pavle
AU  - Šešlija, Sanja
AU  - Popović, Ivanka G.
AU  - Veljović, Đorđe
AU  - Pjanović, Rada
AU  - Panić, Vesna
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2990
AB  - The design of complex polymeric materials with predefined task-specific properties meets challenging issues: to establish synthesis-structure-properties relationship, as well as to understand the arrangement and interactions of the involved components. Hybrid networks of protein (casein) and polyelectrolyte (poly(methacrylic acid)) were synthesized and their swelling, dynamic-mechanical and morphological properties were investigated as functions of the neutralization degree of methacrylic acid and the concentrations of caseinate and crosslinker. The domination of different interactions between components led to diverse forms of casein macromolecules- from micelles to unfold chains. That resulted in very different structures and thereby properties of derived hybrid networks: from porous unswellable to highly swellable and reinforced ones. A great opportunity to easily modulate the final characteristics of the reported hybrid system to fit the need of specific application just through the change of one synthesis parameter was thereby demonstrated.
PB  - Elsevier
T2  - European Polymer Journal
T1  - Casein-poly(methacrylic acid) hybrid soft networks with easy tunable properties
VL  - 113
SP  - 276
EP  - 288
DO  - 10.1016/j.eurpolymj.2019.01.065
ER  - 

@article{
author = "Marković, Maja D. and Spasojević, Pavle and Šešlija, Sanja and Popović, Ivanka G. and Veljović, Đorđe and Pjanović, Rada and Panić, Vesna",
year = "2019",
abstract = "The design of complex polymeric materials with predefined task-specific properties meets challenging issues: to establish synthesis-structure-properties relationship, as well as to understand the arrangement and interactions of the involved components. Hybrid networks of protein (casein) and polyelectrolyte (poly(methacrylic acid)) were synthesized and their swelling, dynamic-mechanical and morphological properties were investigated as functions of the neutralization degree of methacrylic acid and the concentrations of caseinate and crosslinker. The domination of different interactions between components led to diverse forms of casein macromolecules- from micelles to unfold chains. That resulted in very different structures and thereby properties of derived hybrid networks: from porous unswellable to highly swellable and reinforced ones. A great opportunity to easily modulate the final characteristics of the reported hybrid system to fit the need of specific application just through the change of one synthesis parameter was thereby demonstrated.",
publisher = "Elsevier",
journal = "European Polymer Journal",
title = "Casein-poly(methacrylic acid) hybrid soft networks with easy tunable properties",
volume = "113",
pages = "276-288",
doi = "10.1016/j.eurpolymj.2019.01.065"
}

Marković, M. D., Spasojević, P., Šešlija, S., Popović, I. G., Veljović, Đ., Pjanović, R.,& Panić, V.. (2019). Casein-poly(methacrylic acid) hybrid soft networks with easy tunable properties. in European Polymer Journal
Elsevier., 113, 276-288.
https://doi.org/10.1016/j.eurpolymj.2019.01.065

Marković MD, Spasojević P, Šešlija S, Popović IG, Veljović Đ, Pjanović R, Panić V. Casein-poly(methacrylic acid) hybrid soft networks with easy tunable properties. in European Polymer Journal. 2019;113:276-288.
doi:10.1016/j.eurpolymj.2019.01.065 .

Marković, Maja D., Spasojević, Pavle, Šešlija, Sanja, Popović, Ivanka G., Veljović, Đorđe, Pjanović, Rada, Panić, Vesna, "Casein-poly(methacrylic acid) hybrid soft networks with easy tunable properties" in European Polymer Journal, 113 (2019):276-288,
https://doi.org/10.1016/j.eurpolymj.2019.01.065 . .

TY  - JOUR
AU  - Šešlija, Sanja
AU  - Spasojević, Pavle
AU  - Panić, Vesna
AU  - Dobrzynska-Mizera, Monika
AU  - Immirzi, Barbara
AU  - Stevanović, Jasmina
AU  - Popović, Ivanka G.
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2304
AB  - Present study reports synthesis and physico-chemical evaluation of hydrophobically modified pectin derivatives, obtained by reacting of pectin with di-acyl chlorides (glutaryl and sebacoyl chloride). Depending on length of the inserted carbon chains, the acylation resulted in possible formation of mono-grafted (isolated chains) and bi-grafted (chemical gels) structures. The structural features of obtained derivatives were investigated using FTIR spectroscopy, confirming the successful synthesis. The concentrated aqueous solutions of modified pectin showed interesting rheological properties, having lower values of apparent viscosity compared to neat pectin. Since the GPC analysis indicated that no degradation occurred, the viscosity decrease was explained by more heterogeneous organization within modified pectin solutions (microparticles together with sticky polymer entanglement). A shift in particle size distribution proved that proposed modifications also affected pectin solution properties in diluted regime. The modified samples turned to be more sensible to thermal degradation than neat pectin, whereby the increasing size of flexible acyl chains attached to a polymer backbone reduced the glass transition temperature. The hydrophobicity of obtained derivatives was evaluated by sessile drop and du Nouy ring methods. It was found that acylation enhanced hydrophobicity of the pectin molecule, while hydrophobically associative character turned to be inconsistent in aqueous and non-aqueous environment.
PB  - Elsevier
T2  - International Journal of Biological Macromolecules
T1  - Physico-chemical evaluation of hydrophobically modified pectin derivatives: Step toward application
VL  - 113
SP  - 924
EP  - 932
DO  - 10.1016/j.ijbiomac.2018.03.006
ER  - 

@article{
author = "Šešlija, Sanja and Spasojević, Pavle and Panić, Vesna and Dobrzynska-Mizera, Monika and Immirzi, Barbara and Stevanović, Jasmina and Popović, Ivanka G.",
year = "2018",
abstract = "Present study reports synthesis and physico-chemical evaluation of hydrophobically modified pectin derivatives, obtained by reacting of pectin with di-acyl chlorides (glutaryl and sebacoyl chloride). Depending on length of the inserted carbon chains, the acylation resulted in possible formation of mono-grafted (isolated chains) and bi-grafted (chemical gels) structures. The structural features of obtained derivatives were investigated using FTIR spectroscopy, confirming the successful synthesis. The concentrated aqueous solutions of modified pectin showed interesting rheological properties, having lower values of apparent viscosity compared to neat pectin. Since the GPC analysis indicated that no degradation occurred, the viscosity decrease was explained by more heterogeneous organization within modified pectin solutions (microparticles together with sticky polymer entanglement). A shift in particle size distribution proved that proposed modifications also affected pectin solution properties in diluted regime. The modified samples turned to be more sensible to thermal degradation than neat pectin, whereby the increasing size of flexible acyl chains attached to a polymer backbone reduced the glass transition temperature. The hydrophobicity of obtained derivatives was evaluated by sessile drop and du Nouy ring methods. It was found that acylation enhanced hydrophobicity of the pectin molecule, while hydrophobically associative character turned to be inconsistent in aqueous and non-aqueous environment.",
publisher = "Elsevier",
journal = "International Journal of Biological Macromolecules",
title = "Physico-chemical evaluation of hydrophobically modified pectin derivatives: Step toward application",
volume = "113",
pages = "924-932",
doi = "10.1016/j.ijbiomac.2018.03.006"
}

Šešlija, S., Spasojević, P., Panić, V., Dobrzynska-Mizera, M., Immirzi, B., Stevanović, J.,& Popović, I. G.. (2018). Physico-chemical evaluation of hydrophobically modified pectin derivatives: Step toward application. in International Journal of Biological Macromolecules
Elsevier., 113, 924-932.
https://doi.org/10.1016/j.ijbiomac.2018.03.006

Šešlija S, Spasojević P, Panić V, Dobrzynska-Mizera M, Immirzi B, Stevanović J, Popović IG. Physico-chemical evaluation of hydrophobically modified pectin derivatives: Step toward application. in International Journal of Biological Macromolecules. 2018;113:924-932.
doi:10.1016/j.ijbiomac.2018.03.006 .

Šešlija, Sanja, Spasojević, Pavle, Panić, Vesna, Dobrzynska-Mizera, Monika, Immirzi, Barbara, Stevanović, Jasmina, Popović, Ivanka G., "Physico-chemical evaluation of hydrophobically modified pectin derivatives: Step toward application" in International Journal of Biological Macromolecules, 113 (2018):924-932,
https://doi.org/10.1016/j.ijbiomac.2018.03.006 . .

TY  - JOUR
AU  - Fidanovski, Bojana Z.
AU  - Spasojević, Pavle
AU  - Panić, Vesna
AU  - Šešlija, Sanja
AU  - Spasojevic, Jelena P.
AU  - Popović, Ivanka G.
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2458
AB  - The sustainable tomorrow for future generations lies with the present industrial development toward the proper utilization of various bio-based products. For a transition to a higher level of sustainability, it is necessary to form a new platform for advanced technology products. This paper reports the development of new fully bio-based unsaturated polyesters resins (UPRs). A series of prepolymers were synthesized by varying saturated diacids (oxalic, succinic and adipic acid), itaconic acid and 1,2-propandiol. Dimethyl itaconate was used as a reactive diluent (RD) in amounts of 30, 35 and 40 wt%. Rheological measurements showed that the obtained resins possessed viscosities (234-2226 mPa s) amenable to a variety of liquid molding techniques. The impact of composition variables-prepolymer structure and amount of RD-on the chemical, mechanical and thermal properties of the thermosets was examined by DMA, TA and tensile measurements and was discussed in detail. The tensile properties (37-52 MPa), glass transition temperature (60-97 A degrees C) and coefficient of thermal expansion (71-168 10(-6) A degrees C-1) of the cured resins were in the desired range for UPRs. This investigation showed that UPRs based on itaconic acid can be tailored during synthesis of the prepolymer to meet the needs of different property profiles.
PB  - Springer
T2  - Journal of Materials Science
T1  - Synthesis and characterization of fully bio-based unsaturated polyester resins
VL  - 53
IS  - 6
SP  - 4635
EP  - 4644
DO  - 10.1007/s10853-017-1822-y
ER  - 

@article{
author = "Fidanovski, Bojana Z. and Spasojević, Pavle and Panić, Vesna and Šešlija, Sanja and Spasojevic, Jelena P. and Popović, Ivanka G.",
year = "2018",
abstract = "The sustainable tomorrow for future generations lies with the present industrial development toward the proper utilization of various bio-based products. For a transition to a higher level of sustainability, it is necessary to form a new platform for advanced technology products. This paper reports the development of new fully bio-based unsaturated polyesters resins (UPRs). A series of prepolymers were synthesized by varying saturated diacids (oxalic, succinic and adipic acid), itaconic acid and 1,2-propandiol. Dimethyl itaconate was used as a reactive diluent (RD) in amounts of 30, 35 and 40 wt%. Rheological measurements showed that the obtained resins possessed viscosities (234-2226 mPa s) amenable to a variety of liquid molding techniques. The impact of composition variables-prepolymer structure and amount of RD-on the chemical, mechanical and thermal properties of the thermosets was examined by DMA, TA and tensile measurements and was discussed in detail. The tensile properties (37-52 MPa), glass transition temperature (60-97 A degrees C) and coefficient of thermal expansion (71-168 10(-6) A degrees C-1) of the cured resins were in the desired range for UPRs. This investigation showed that UPRs based on itaconic acid can be tailored during synthesis of the prepolymer to meet the needs of different property profiles.",
publisher = "Springer",
journal = "Journal of Materials Science",
title = "Synthesis and characterization of fully bio-based unsaturated polyester resins",
volume = "53",
number = "6",
pages = "4635-4644",
doi = "10.1007/s10853-017-1822-y"
}

Fidanovski, B. Z., Spasojević, P., Panić, V., Šešlija, S., Spasojevic, J. P.,& Popović, I. G.. (2018). Synthesis and characterization of fully bio-based unsaturated polyester resins. in Journal of Materials Science
Springer., 53(6), 4635-4644.
https://doi.org/10.1007/s10853-017-1822-y

Fidanovski BZ, Spasojević P, Panić V, Šešlija S, Spasojevic JP, Popović IG. Synthesis and characterization of fully bio-based unsaturated polyester resins. in Journal of Materials Science. 2018;53(6):4635-4644.
doi:10.1007/s10853-017-1822-y .

Fidanovski, Bojana Z., Spasojević, Pavle, Panić, Vesna, Šešlija, Sanja, Spasojevic, Jelena P., Popović, Ivanka G., "Synthesis and characterization of fully bio-based unsaturated polyester resins" in Journal of Materials Science, 53, no. 6 (2018):4635-4644,
https://doi.org/10.1007/s10853-017-1822-y . .

TY  - JOUR
AU  - Šešlija, Sanja
AU  - Spasojević, Pavle
AU  - Panić, Vesna
AU  - Dobrzynska-Mizera, Monika
AU  - Immirzi, Barbara
AU  - Stevanović, Jasmina
AU  - Popović, Ivanka G.
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4290
AB  - Present study reports synthesis and physico-chemical evaluation of hydrophobically modified pectin derivatives, obtained by reacting of pectin with di-acyl chlorides (glutaryl and sebacoyl chloride). Depending on length of the inserted carbon chains, the acylation resulted in possible formation of mono-grafted (isolated chains) and bi-grafted (chemical gels) structures. The structural features of obtained derivatives were investigated using FTIR spectroscopy, confirming the successful synthesis. The concentrated aqueous solutions of modified pectin showed interesting rheological properties, having lower values of apparent viscosity compared to neat pectin. Since the GPC analysis indicated that no degradation occurred, the viscosity decrease was explained by more heterogeneous organization within modified pectin solutions (microparticles together with sticky polymer entanglement). A shift in particle size distribution proved that proposed modifications also affected pectin solution properties in diluted regime. The modified samples turned to be more sensible to thermal degradation than neat pectin, whereby the increasing size of flexible acyl chains attached to a polymer backbone reduced the glass transition temperature. The hydrophobicity of obtained derivatives was evaluated by sessile drop and du Nouy ring methods. It was found that acylation enhanced hydrophobicity of the pectin molecule, while hydrophobically associative character turned to be inconsistent in aqueous and non-aqueous environment.
PB  - Elsevier
T2  - International Journal of Biological Macromolecules
T1  - Physico-chemical evaluation of hydrophobically modified pectin derivatives: Step toward application
VL  - 113
SP  - 924
EP  - 932
DO  - 10.1016/j.ijbiomac.2018.03.006
ER  - 

@article{
author = "Šešlija, Sanja and Spasojević, Pavle and Panić, Vesna and Dobrzynska-Mizera, Monika and Immirzi, Barbara and Stevanović, Jasmina and Popović, Ivanka G.",
year = "2018",
abstract = "Present study reports synthesis and physico-chemical evaluation of hydrophobically modified pectin derivatives, obtained by reacting of pectin with di-acyl chlorides (glutaryl and sebacoyl chloride). Depending on length of the inserted carbon chains, the acylation resulted in possible formation of mono-grafted (isolated chains) and bi-grafted (chemical gels) structures. The structural features of obtained derivatives were investigated using FTIR spectroscopy, confirming the successful synthesis. The concentrated aqueous solutions of modified pectin showed interesting rheological properties, having lower values of apparent viscosity compared to neat pectin. Since the GPC analysis indicated that no degradation occurred, the viscosity decrease was explained by more heterogeneous organization within modified pectin solutions (microparticles together with sticky polymer entanglement). A shift in particle size distribution proved that proposed modifications also affected pectin solution properties in diluted regime. The modified samples turned to be more sensible to thermal degradation than neat pectin, whereby the increasing size of flexible acyl chains attached to a polymer backbone reduced the glass transition temperature. The hydrophobicity of obtained derivatives was evaluated by sessile drop and du Nouy ring methods. It was found that acylation enhanced hydrophobicity of the pectin molecule, while hydrophobically associative character turned to be inconsistent in aqueous and non-aqueous environment.",
publisher = "Elsevier",
journal = "International Journal of Biological Macromolecules",
title = "Physico-chemical evaluation of hydrophobically modified pectin derivatives: Step toward application",
volume = "113",
pages = "924-932",
doi = "10.1016/j.ijbiomac.2018.03.006"
}

Šešlija, S., Spasojević, P., Panić, V., Dobrzynska-Mizera, M., Immirzi, B., Stevanović, J.,& Popović, I. G.. (2018). Physico-chemical evaluation of hydrophobically modified pectin derivatives: Step toward application. in International Journal of Biological Macromolecules
Elsevier., 113, 924-932.
https://doi.org/10.1016/j.ijbiomac.2018.03.006

Šešlija S, Spasojević P, Panić V, Dobrzynska-Mizera M, Immirzi B, Stevanović J, Popović IG. Physico-chemical evaluation of hydrophobically modified pectin derivatives: Step toward application. in International Journal of Biological Macromolecules. 2018;113:924-932.
doi:10.1016/j.ijbiomac.2018.03.006 .

Šešlija, Sanja, Spasojević, Pavle, Panić, Vesna, Dobrzynska-Mizera, Monika, Immirzi, Barbara, Stevanović, Jasmina, Popović, Ivanka G., "Physico-chemical evaluation of hydrophobically modified pectin derivatives: Step toward application" in International Journal of Biological Macromolecules, 113 (2018):924-932,
https://doi.org/10.1016/j.ijbiomac.2018.03.006 . .

TY  - JOUR
AU  - Radoman, Tijana S.
AU  - Džunuzović, Jasna
AU  - Spasojević, Pavle
AU  - Marinović-Cincović, Milena
AU  - Jeremić, Katarina B.
AU  - Popović, Ivanka G.
AU  - Džunuzović, Enis S.
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2331
AB  - Alkyd resin/TiO2 nanocomposites (NC) were prepared from short oil alkyd resin and TiO2 nanoparticles (NPs) surface modified with in situ formed imine ligand, based on 3,4-dihydroxybenzaldehyde and oleylamine, or with three gallic acid esters. The short oil alkyd resin was synthesized from sunflower oil, phthalic anhydride, and trimethylolpropane. Unmodified and surface modified TiO2 NPs were examined by transmission electron microscopy. Rheological investigation revealed that prepared dispersions have higher dynamic viscosity than pure alkyd resin. Using different characterization methods it was obtained that NCs have similar thermooxidative stability as alkyd resin, lower glass transition temperature, better barrier properties, enhanced hardness, better chemical resistance, and lower adhesion to the metal, except in the case of NC prepared using TiO2 NPs surface modified with imine, which exhibited better adhesion to the metal than pure alkyd resin.
PB  - Hoboken : Wiley
T2  - Polymer Composites
T1  - Preparation and Properties of Short Oil Alkyd Resin/TiO2 Nanocomposites Based on Surface Modified TiO2 Nanoparticles
VL  - 39
IS  - 5
SP  - 1488
EP  - 1499
DO  - 10.1002/pc.24089
ER  - 

@article{
author = "Radoman, Tijana S. and Džunuzović, Jasna and Spasojević, Pavle and Marinović-Cincović, Milena and Jeremić, Katarina B. and Popović, Ivanka G. and Džunuzović, Enis S.",
year = "2018",
abstract = "Alkyd resin/TiO2 nanocomposites (NC) were prepared from short oil alkyd resin and TiO2 nanoparticles (NPs) surface modified with in situ formed imine ligand, based on 3,4-dihydroxybenzaldehyde and oleylamine, or with three gallic acid esters. The short oil alkyd resin was synthesized from sunflower oil, phthalic anhydride, and trimethylolpropane. Unmodified and surface modified TiO2 NPs were examined by transmission electron microscopy. Rheological investigation revealed that prepared dispersions have higher dynamic viscosity than pure alkyd resin. Using different characterization methods it was obtained that NCs have similar thermooxidative stability as alkyd resin, lower glass transition temperature, better barrier properties, enhanced hardness, better chemical resistance, and lower adhesion to the metal, except in the case of NC prepared using TiO2 NPs surface modified with imine, which exhibited better adhesion to the metal than pure alkyd resin.",
publisher = "Hoboken : Wiley",
journal = "Polymer Composites",
title = "Preparation and Properties of Short Oil Alkyd Resin/TiO2 Nanocomposites Based on Surface Modified TiO2 Nanoparticles",
volume = "39",
number = "5",
pages = "1488-1499",
doi = "10.1002/pc.24089"
}

Radoman, T. S., Džunuzović, J., Spasojević, P., Marinović-Cincović, M., Jeremić, K. B., Popović, I. G.,& Džunuzović, E. S.. (2018). Preparation and Properties of Short Oil Alkyd Resin/TiO2 Nanocomposites Based on Surface Modified TiO2 Nanoparticles. in Polymer Composites
Hoboken : Wiley., 39(5), 1488-1499.
https://doi.org/10.1002/pc.24089

Radoman TS, Džunuzović J, Spasojević P, Marinović-Cincović M, Jeremić KB, Popović IG, Džunuzović ES. Preparation and Properties of Short Oil Alkyd Resin/TiO2 Nanocomposites Based on Surface Modified TiO2 Nanoparticles. in Polymer Composites. 2018;39(5):1488-1499.
doi:10.1002/pc.24089 .

Radoman, Tijana S., Džunuzović, Jasna, Spasojević, Pavle, Marinović-Cincović, Milena, Jeremić, Katarina B., Popović, Ivanka G., Džunuzović, Enis S., "Preparation and Properties of Short Oil Alkyd Resin/TiO2 Nanocomposites Based on Surface Modified TiO2 Nanoparticles" in Polymer Composites, 39, no. 5 (2018):1488-1499,
https://doi.org/10.1002/pc.24089 . .

TY  - JOUR
AU  - Panić, Vesna
AU  - Šešlija, Sanja
AU  - Popović, Ivanka G.
AU  - Spasojevic, Vuk D.
AU  - Popović, Aleksandar R.
AU  - Nikolić, Vladimir B.
AU  - Spasojević, Pavle
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2126
AB  - For the preparation of fully biobased unsaturated polyester resins (UPRs), the replacement of styrene with alternate nonpetroleum-based monomers turned out to be one of the most challenging tasks. Its complexity lies in the fact that reactive diluents (RD) have to have low viscosity and volatility, good compatibility with prepolymer, and capability to homopolymerize and copolymerize with its unsaturations. In this context, we directed our efforts to develop fully biobased UPRs using the dialkyl itaconates as an alternative to styrene. Therefore, a series of 100% biobased UPRs were prepared from itaconic acid and 1,2-propandiol and diluted by dialkyl itaconates. The resins were characterized by Fourier transform infrared spectroscopy, NMR, volatility, and viscosity measurements, while the cured samples were characterized by dynamic mechanical properties, thermomechanical analysis, thermogravimetric analysis data, and tensile tests. The influence of RD structure on the properties of cured samples was discussed in detail. It was shown that the prepared resins had evaporation rates of dialkyl itaconates of several orders of magnitude less compared to styrene. The cured resins with dimethyl itaconate showed comparable or even better thermal and mechanical properties compared to the one with styrene. This investigation showed that itaconic acid and dialkyl itaconates are promising bioresources for the preparation of fully biobased UPRs for mass consumption.
PB  - American Chemical Society (ACS)
T2  - Biomacromolecules
T1  - Simple One-Pot Synthesis of Fully Biobased Unsaturated Polyester Resins Based on Itaconic Acid
VL  - 18
IS  - 12
SP  - 3881
EP  - 3891
DO  - 10.1021/acs.biomac.7b00840
ER  - 

@article{
author = "Panić, Vesna and Šešlija, Sanja and Popović, Ivanka G. and Spasojevic, Vuk D. and Popović, Aleksandar R. and Nikolić, Vladimir B. and Spasojević, Pavle",
year = "2017",
abstract = "For the preparation of fully biobased unsaturated polyester resins (UPRs), the replacement of styrene with alternate nonpetroleum-based monomers turned out to be one of the most challenging tasks. Its complexity lies in the fact that reactive diluents (RD) have to have low viscosity and volatility, good compatibility with prepolymer, and capability to homopolymerize and copolymerize with its unsaturations. In this context, we directed our efforts to develop fully biobased UPRs using the dialkyl itaconates as an alternative to styrene. Therefore, a series of 100% biobased UPRs were prepared from itaconic acid and 1,2-propandiol and diluted by dialkyl itaconates. The resins were characterized by Fourier transform infrared spectroscopy, NMR, volatility, and viscosity measurements, while the cured samples were characterized by dynamic mechanical properties, thermomechanical analysis, thermogravimetric analysis data, and tensile tests. The influence of RD structure on the properties of cured samples was discussed in detail. It was shown that the prepared resins had evaporation rates of dialkyl itaconates of several orders of magnitude less compared to styrene. The cured resins with dimethyl itaconate showed comparable or even better thermal and mechanical properties compared to the one with styrene. This investigation showed that itaconic acid and dialkyl itaconates are promising bioresources for the preparation of fully biobased UPRs for mass consumption.",
publisher = "American Chemical Society (ACS)",
journal = "Biomacromolecules",
title = "Simple One-Pot Synthesis of Fully Biobased Unsaturated Polyester Resins Based on Itaconic Acid",
volume = "18",
number = "12",
pages = "3881-3891",
doi = "10.1021/acs.biomac.7b00840"
}

Panić, V., Šešlija, S., Popović, I. G., Spasojevic, V. D., Popović, A. R., Nikolić, V. B.,& Spasojević, P.. (2017). Simple One-Pot Synthesis of Fully Biobased Unsaturated Polyester Resins Based on Itaconic Acid. in Biomacromolecules
American Chemical Society (ACS)., 18(12), 3881-3891.
https://doi.org/10.1021/acs.biomac.7b00840

Panić V, Šešlija S, Popović IG, Spasojevic VD, Popović AR, Nikolić VB, Spasojević P. Simple One-Pot Synthesis of Fully Biobased Unsaturated Polyester Resins Based on Itaconic Acid. in Biomacromolecules. 2017;18(12):3881-3891.
doi:10.1021/acs.biomac.7b00840 .

Panić, Vesna, Šešlija, Sanja, Popović, Ivanka G., Spasojevic, Vuk D., Popović, Aleksandar R., Nikolić, Vladimir B., Spasojević, Pavle, "Simple One-Pot Synthesis of Fully Biobased Unsaturated Polyester Resins Based on Itaconic Acid" in Biomacromolecules, 18, no. 12 (2017):3881-3891,
https://doi.org/10.1021/acs.biomac.7b00840 . .

TY  - JOUR
AU  - Panić, Vesna
AU  - Šešlija, Sanja
AU  - Popović, Ivanka G.
AU  - Spasojević, Vuk D.
AU  - Popović, Aleksandar R.
AU  - Nikolić, Vladimir
AU  - Spasojević, Pavle
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2922
AB  - For the preparation of fully biobased unsaturated polyester resins (UPRs), the replacement of styrene with alternate nonpetroleum-based monomers turned out to be one of the most challenging tasks. Its complexity lies in the fact that reactive diluents (RD) have to have low viscosity and volatility, good compatibility with prepolymer, and capability to homopolymerize and copolymerize with its unsaturations. In this context, we directed our efforts to develop fully biobased UPRs using the dialkyl itaconates as an alternative to styrene. Therefore, a series of 100% biobased UPRs were prepared from itaconic acid and 1,2-propandiol and diluted by dialkyl itaconates. The resins were characterized by Fourier transform infrared spectroscopy, NMR, volatility, and viscosity measurements, while the cured samples were characterized by dynamic mechanical properties, thermomechanical analysis, thermogravimetric analysis data, and tensile tests. The influence of RD structure on the properties of cured samples was discussed in detail. It was shown that the prepared resins had evaporation rates of dialkyl itaconates of several orders of magnitude less compared to styrene. The cured resins with dimethyl itaconate showed comparable or even better thermal and mechanical properties compared to the one with styrene. This investigation showed that itaconic acid and dialkyl itaconates are promising bioresources for the preparation of fully biobased UPRs for mass consumption.
PB  - American Chemical Society (ACS)
T2  - Biomacromolecules
T1  - Simple One-Pot Synthesis of Fully Biobased Unsaturated Polyester Resins Based on Itaconic Acid
VL  - 18
IS  - 12
SP  - 3881
EP  - 3891
DO  - 10.1021/acs.biomac.7b00840
ER  - 

@article{
author = "Panić, Vesna and Šešlija, Sanja and Popović, Ivanka G. and Spasojević, Vuk D. and Popović, Aleksandar R. and Nikolić, Vladimir and Spasojević, Pavle",
year = "2017",
abstract = "For the preparation of fully biobased unsaturated polyester resins (UPRs), the replacement of styrene with alternate nonpetroleum-based monomers turned out to be one of the most challenging tasks. Its complexity lies in the fact that reactive diluents (RD) have to have low viscosity and volatility, good compatibility with prepolymer, and capability to homopolymerize and copolymerize with its unsaturations. In this context, we directed our efforts to develop fully biobased UPRs using the dialkyl itaconates as an alternative to styrene. Therefore, a series of 100% biobased UPRs were prepared from itaconic acid and 1,2-propandiol and diluted by dialkyl itaconates. The resins were characterized by Fourier transform infrared spectroscopy, NMR, volatility, and viscosity measurements, while the cured samples were characterized by dynamic mechanical properties, thermomechanical analysis, thermogravimetric analysis data, and tensile tests. The influence of RD structure on the properties of cured samples was discussed in detail. It was shown that the prepared resins had evaporation rates of dialkyl itaconates of several orders of magnitude less compared to styrene. The cured resins with dimethyl itaconate showed comparable or even better thermal and mechanical properties compared to the one with styrene. This investigation showed that itaconic acid and dialkyl itaconates are promising bioresources for the preparation of fully biobased UPRs for mass consumption.",
publisher = "American Chemical Society (ACS)",
journal = "Biomacromolecules",
title = "Simple One-Pot Synthesis of Fully Biobased Unsaturated Polyester Resins Based on Itaconic Acid",
volume = "18",
number = "12",
pages = "3881-3891",
doi = "10.1021/acs.biomac.7b00840"
}

Panić, V., Šešlija, S., Popović, I. G., Spasojević, V. D., Popović, A. R., Nikolić, V.,& Spasojević, P.. (2017). Simple One-Pot Synthesis of Fully Biobased Unsaturated Polyester Resins Based on Itaconic Acid. in Biomacromolecules
American Chemical Society (ACS)., 18(12), 3881-3891.
https://doi.org/10.1021/acs.biomac.7b00840

Panić V, Šešlija S, Popović IG, Spasojević VD, Popović AR, Nikolić V, Spasojević P. Simple One-Pot Synthesis of Fully Biobased Unsaturated Polyester Resins Based on Itaconic Acid. in Biomacromolecules. 2017;18(12):3881-3891.
doi:10.1021/acs.biomac.7b00840 .

Panić, Vesna, Šešlija, Sanja, Popović, Ivanka G., Spasojević, Vuk D., Popović, Aleksandar R., Nikolić, Vladimir, Spasojević, Pavle, "Simple One-Pot Synthesis of Fully Biobased Unsaturated Polyester Resins Based on Itaconic Acid" in Biomacromolecules, 18, no. 12 (2017):3881-3891,
https://doi.org/10.1021/acs.biomac.7b00840 . .

TY  - CHAP
AU  - Marinović, Sanja
AU  - Popović, Ivanka
AU  - Dunjić, Branko
PY  - 2016
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3751
AB  - Different components of interpenetrating polymer networks (IPNs) have different influence on their properties and their behavior in various applications, such as automotive dual curing applications. Dual curing systems, upon hardening, can give interpenetrating polymer networks (IPNs). UV–thermal dual‐cure process that was used to obtain IPNs consisted of an UV curable acrylic component and a classic 2‐pack urethane component. Novel acrylate‐terminated hyperbranched polyester with high functionality HBP(A) was used as part of the acrylic component, which was cured by UV radiation. The urethane part of the IPNs was classical 2‐pack polyurethane and it was crosslinked by heating.The aim was to explore the influence of thermosetting resin HBP(A) on IPN properties. First, the weight ratio of HBP(A) and a reactive diluent 2‐ethyl hexyl acrylate (EHA) in the IPNs was varied from 100/0 to 25/75, while the urethane component remained the same in all the IPN samples. Then, the IPN with 50/50 weight ratio in acrylic component was used to investigate the influence of the reactive diluent in IPNs on their behavior, but also to see more clearly the role of the HBP(A) component. All the IPNs were also compared to a classical 2‐pack polyurethane clear coat consisted of a hydroxyl functional acrylate copolymer (HA) and Desmodur®N3390.The IPNs were characterized by dynamic mechanical analysis (DMA), differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA). The mechanical properties of the IPNs were also investigated.DMA showed that with increasing HBP(A) in the IPNs, the crosslink density increased, while the flexibility decreased. The data obtained by DMA and DSC showed a decrease of the Tg values with increasing amount of HBP(A). There were slight differences in the thermal stability of the IPNs.
PB  - Wiley
T2  - Micro- and Nano-structured Interpenetrating Polymer Networks - From Design to Applications
T1  - Micro- and nano-structured IPNs based on thermosetting resins
SP  - 109
EP  - 126
DO  - 10.1002/9781119138945.ch4
ER  - 

@inbook{
author = "Marinović, Sanja and Popović, Ivanka and Dunjić, Branko",
year = "2016",
abstract = "Different components of interpenetrating polymer networks (IPNs) have different influence on their properties and their behavior in various applications, such as automotive dual curing applications. Dual curing systems, upon hardening, can give interpenetrating polymer networks (IPNs). UV–thermal dual‐cure process that was used to obtain IPNs consisted of an UV curable acrylic component and a classic 2‐pack urethane component. Novel acrylate‐terminated hyperbranched polyester with high functionality HBP(A) was used as part of the acrylic component, which was cured by UV radiation. The urethane part of the IPNs was classical 2‐pack polyurethane and it was crosslinked by heating.The aim was to explore the influence of thermosetting resin HBP(A) on IPN properties. First, the weight ratio of HBP(A) and a reactive diluent 2‐ethyl hexyl acrylate (EHA) in the IPNs was varied from 100/0 to 25/75, while the urethane component remained the same in all the IPN samples. Then, the IPN with 50/50 weight ratio in acrylic component was used to investigate the influence of the reactive diluent in IPNs on their behavior, but also to see more clearly the role of the HBP(A) component. All the IPNs were also compared to a classical 2‐pack polyurethane clear coat consisted of a hydroxyl functional acrylate copolymer (HA) and Desmodur®N3390.The IPNs were characterized by dynamic mechanical analysis (DMA), differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA). The mechanical properties of the IPNs were also investigated.DMA showed that with increasing HBP(A) in the IPNs, the crosslink density increased, while the flexibility decreased. The data obtained by DMA and DSC showed a decrease of the Tg values with increasing amount of HBP(A). There were slight differences in the thermal stability of the IPNs.",
publisher = "Wiley",
journal = "Micro- and Nano-structured Interpenetrating Polymer Networks - From Design to Applications",
booktitle = "Micro- and nano-structured IPNs based on thermosetting resins",
pages = "109-126",
doi = "10.1002/9781119138945.ch4"
}

Marinović, S., Popović, I.,& Dunjić, B.. (2016). Micro- and nano-structured IPNs based on thermosetting resins. in Micro- and Nano-structured Interpenetrating Polymer Networks - From Design to Applications
Wiley., 109-126.
https://doi.org/10.1002/9781119138945.ch4

Marinović S, Popović I, Dunjić B. Micro- and nano-structured IPNs based on thermosetting resins. in Micro- and Nano-structured Interpenetrating Polymer Networks - From Design to Applications. 2016;:109-126.
doi:10.1002/9781119138945.ch4 .

Marinović, Sanja, Popović, Ivanka, Dunjić, Branko, "Micro- and nano-structured IPNs based on thermosetting resins" in Micro- and Nano-structured Interpenetrating Polymer Networks - From Design to Applications (2016):109-126,
https://doi.org/10.1002/9781119138945.ch4 . .

TY  - JOUR
AU  - Šešlija, Sanja
AU  - Veljović, Đorđe
AU  - Kalagasidis Krušić, Melina
AU  - Stevanović, Jasmina
AU  - Veličković, Sava J.
AU  - Popović, Ivanka G.
PY  - 2016
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1968
AB  - The aim of this work was to investigate the influence of specific anions on the cross-linking process of highly methoxylated pectin using the following copper salts CuSO4; Cu(C2H3O2)(2); CuCl2; and Cu(NO3)(2) wherein the initial salt concentrations were varied from 0.5 up to 10 g l(-1). It was found that the anions affected the sorption capacity wherein the Cu2+ sorption capacity from the sulphate solution was the highest, while it decreased in the presence of CH3COO-, Cl- and NO3- ions, respectively. This difference was mostly pronounced at the higher initial salt concentrations (co(Cu2+) > 2 g l(-1)). The obtained beads were characterized by FTIR, MS, SEM/EDS microanalysis and mechanical compression tests up to 80% of deformation. The sorption data were applied to the Langmuir and Freundlich isotherm models and various calculated parameters confirmed the sulphate anion supportive nature in metal ion binding. The value of the K-f parameter for the cross-linking process of pectin in the presence of acetate, chloride and nitrate was approximately the same (K-f approximate to 0.027 g g(-1)), while it was higher in the presence of sulphate anions by more than 20% (K-f = 0.0352 g g(-1)). The predicted 1/n values (1/n  LT  1, 1/n > 1, 1/n = 1 for the sulphate, nitrate and acetate, and chloride anions, respectively) were the quantitative confirmation of the specific interactions involved in the cross-linking mechanism caused by different anions. The established anion influence was in accordance with the typical ion-specific influence on macromolecules in aqueous systems proposed by Hofmeister.
PB  - Royal Soc Chemistry, Cambridge
T2  - New Journal of Chemistry
T1  - Cross-linking of highly methoxylated pectin with copper: the specific anion influence
VL  - 40
IS  - 2
SP  - 1618
EP  - 1625
DO  - 10.1039/c5nj03320a
ER  - 

@article{
author = "Šešlija, Sanja and Veljović, Đorđe and Kalagasidis Krušić, Melina and Stevanović, Jasmina and Veličković, Sava J. and Popović, Ivanka G.",
year = "2016",
abstract = "The aim of this work was to investigate the influence of specific anions on the cross-linking process of highly methoxylated pectin using the following copper salts CuSO4; Cu(C2H3O2)(2); CuCl2; and Cu(NO3)(2) wherein the initial salt concentrations were varied from 0.5 up to 10 g l(-1). It was found that the anions affected the sorption capacity wherein the Cu2+ sorption capacity from the sulphate solution was the highest, while it decreased in the presence of CH3COO-, Cl- and NO3- ions, respectively. This difference was mostly pronounced at the higher initial salt concentrations (co(Cu2+) > 2 g l(-1)). The obtained beads were characterized by FTIR, MS, SEM/EDS microanalysis and mechanical compression tests up to 80% of deformation. The sorption data were applied to the Langmuir and Freundlich isotherm models and various calculated parameters confirmed the sulphate anion supportive nature in metal ion binding. The value of the K-f parameter for the cross-linking process of pectin in the presence of acetate, chloride and nitrate was approximately the same (K-f approximate to 0.027 g g(-1)), while it was higher in the presence of sulphate anions by more than 20% (K-f = 0.0352 g g(-1)). The predicted 1/n values (1/n  LT  1, 1/n > 1, 1/n = 1 for the sulphate, nitrate and acetate, and chloride anions, respectively) were the quantitative confirmation of the specific interactions involved in the cross-linking mechanism caused by different anions. The established anion influence was in accordance with the typical ion-specific influence on macromolecules in aqueous systems proposed by Hofmeister.",
publisher = "Royal Soc Chemistry, Cambridge",
journal = "New Journal of Chemistry",
title = "Cross-linking of highly methoxylated pectin with copper: the specific anion influence",
volume = "40",
number = "2",
pages = "1618-1625",
doi = "10.1039/c5nj03320a"
}

Šešlija, S., Veljović, Đ., Kalagasidis Krušić, M., Stevanović, J., Veličković, S. J.,& Popović, I. G.. (2016). Cross-linking of highly methoxylated pectin with copper: the specific anion influence. in New Journal of Chemistry
Royal Soc Chemistry, Cambridge., 40(2), 1618-1625.
https://doi.org/10.1039/c5nj03320a

Šešlija S, Veljović Đ, Kalagasidis Krušić M, Stevanović J, Veličković SJ, Popović IG. Cross-linking of highly methoxylated pectin with copper: the specific anion influence. in New Journal of Chemistry. 2016;40(2):1618-1625.
doi:10.1039/c5nj03320a .

Šešlija, Sanja, Veljović, Đorđe, Kalagasidis Krušić, Melina, Stevanović, Jasmina, Veličković, Sava J., Popović, Ivanka G., "Cross-linking of highly methoxylated pectin with copper: the specific anion influence" in New Journal of Chemistry, 40, no. 2 (2016):1618-1625,
https://doi.org/10.1039/c5nj03320a . .

TY  - JOUR
AU  - Spasojević, Pavle
AU  - Panić, Vesna
AU  - Džunuzović, Jasna
AU  - Marinković, Aleksandar D.
AU  - Woortman, A J J
AU  - Loos, K
AU  - Popović, Ivanka G.
PY  - 2015
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1632
AB  - The glycolytic recycling of waste PET presents a challenge for the production of secondary value-added products, such as alkyd resins. A way to overcome the unsatisfactory mechanical, drying and chemical resistance properties of alkyds obtained from difunctional glycolyzates was proposed. Waste PET was glycolyzed using multifunctional alcohols: glycerol (G), trimethylolethane (TME), trimethylolpropane (TMP) and pentaerythritol (PE), giving tetra-and hexa-functional glycolyzates and, for comparison, using diethylene glycol (DEG), propylene glycol (PG) and dipropylene glycol (DPG) giving di-functional glycolyzates. The obtained glycolyzates were examined by H-1 and C-13 NMR, FTIR spectroscopy and elemental analysis and further used in the synthesis of alkyd resins. The properties of the prepared alkyd resins (acid, hydroxyl and iodine values, color, average molar masses and molar mass distributions, viscosity, drying time, hardness, flexibility, gloss, adhesion and chemical resistance) were investigated with respect to the functionality and the structure of the used glycolyzates. Alkyd resins derived from multifunctional glycolyzates (TME and TMP) showed considerably enhanced properties compared to those produced from difunctional glycolyzates and also to conventional general purpose resins.
PB  - The Royal Society of Chemistry
T2  - RSC Advances
T1  - High performance alkyd resins synthesized from postconsumer PET bottles
VL  - 5
IS  - 76
SP  - 62273
EP  - 62283
DO  - 10.1039/c5ra11777a
ER  - 

@article{
author = "Spasojević, Pavle and Panić, Vesna and Džunuzović, Jasna and Marinković, Aleksandar D. and Woortman, A J J and Loos, K and Popović, Ivanka G.",
year = "2015",
abstract = "The glycolytic recycling of waste PET presents a challenge for the production of secondary value-added products, such as alkyd resins. A way to overcome the unsatisfactory mechanical, drying and chemical resistance properties of alkyds obtained from difunctional glycolyzates was proposed. Waste PET was glycolyzed using multifunctional alcohols: glycerol (G), trimethylolethane (TME), trimethylolpropane (TMP) and pentaerythritol (PE), giving tetra-and hexa-functional glycolyzates and, for comparison, using diethylene glycol (DEG), propylene glycol (PG) and dipropylene glycol (DPG) giving di-functional glycolyzates. The obtained glycolyzates were examined by H-1 and C-13 NMR, FTIR spectroscopy and elemental analysis and further used in the synthesis of alkyd resins. The properties of the prepared alkyd resins (acid, hydroxyl and iodine values, color, average molar masses and molar mass distributions, viscosity, drying time, hardness, flexibility, gloss, adhesion and chemical resistance) were investigated with respect to the functionality and the structure of the used glycolyzates. Alkyd resins derived from multifunctional glycolyzates (TME and TMP) showed considerably enhanced properties compared to those produced from difunctional glycolyzates and also to conventional general purpose resins.",
publisher = "The Royal Society of Chemistry",
journal = "RSC Advances",
title = "High performance alkyd resins synthesized from postconsumer PET bottles",
volume = "5",
number = "76",
pages = "62273-62283",
doi = "10.1039/c5ra11777a"
}

Spasojević, P., Panić, V., Džunuzović, J., Marinković, A. D., Woortman, A. J. J., Loos, K.,& Popović, I. G.. (2015). High performance alkyd resins synthesized from postconsumer PET bottles. in RSC Advances
The Royal Society of Chemistry., 5(76), 62273-62283.
https://doi.org/10.1039/c5ra11777a

Spasojević P, Panić V, Džunuzović J, Marinković AD, Woortman AJJ, Loos K, Popović IG. High performance alkyd resins synthesized from postconsumer PET bottles. in RSC Advances. 2015;5(76):62273-62283.
doi:10.1039/c5ra11777a .

Spasojević, Pavle, Panić, Vesna, Džunuzović, Jasna, Marinković, Aleksandar D., Woortman, A J J, Loos, K, Popović, Ivanka G., "High performance alkyd resins synthesized from postconsumer PET bottles" in RSC Advances, 5, no. 76 (2015):62273-62283,
https://doi.org/10.1039/c5ra11777a . .

TY  - JOUR
AU  - Spasojević, Pavle
AU  - Panić, Vesna
AU  - Šešlija, Sanja
AU  - Nikolić, Vladimir
AU  - Popović, Ivanka G.
AU  - Veličković, Sava J.
PY  - 2015
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1828
AB  - The aim of this work was to examine the possibility of modification of commercial denture base materials with itaconic acid esters, in order to obtain materials with lower toxicity and higher biocompatibility. Despite their relatively higher price compared to methacrylates, itaconic acid and itaconates are materials of choice for environmentally friendly applications, because they are not produced from petrochemical sources, but from plant products. A commercial system based on poly(methyl methacrylate) was modified using ditetrahydrofurfuryl itaconate (DTHFI), whereby the ratio of DTHFI was varied from 2.5 to 10 % by weight. Copolymerization was confirmed using FTIR spectroscopy, while SEM analysis showed the absence of micro defects and pores in the structure. The effects of the itaconate content on the absorption of fluids, the residual monomer content, thermal, dynamic-mechanical and mechanical properties (hardness, toughness, stress and elongation at break) were investigated. It was found that the addition of DTHFI significantly reduced the amount of residual methyl methacrylate, which made these materials less toxic. It was shown that increasing the DTHFI content resulted in materials with decreased glass transition temperatures, as well as with decreased storage modulus, ultimate tensile strength and impact fracture resistance; however the mechanical properties were in the rang prescribed by ADA standards, and the materials could be used in practice. The deterioration in mechanical properties was therefore worthwhile in order to gain lower toxicity of the leached monomer.
PB  - Serbian Chemical Soc, Belgrade
T2  - Journal of the Serbian Chemical Society
T1  - Poly(methyl methacrylate) denture base materials modified with ditetrahydrofurfuryl itaconate: Significant applicative properties
VL  - 80
IS  - 9
SP  - 1177
DO  - 10.2298/JSC150123034S
ER  - 

@article{
author = "Spasojević, Pavle and Panić, Vesna and Šešlija, Sanja and Nikolić, Vladimir and Popović, Ivanka G. and Veličković, Sava J.",
year = "2015",
abstract = "The aim of this work was to examine the possibility of modification of commercial denture base materials with itaconic acid esters, in order to obtain materials with lower toxicity and higher biocompatibility. Despite their relatively higher price compared to methacrylates, itaconic acid and itaconates are materials of choice for environmentally friendly applications, because they are not produced from petrochemical sources, but from plant products. A commercial system based on poly(methyl methacrylate) was modified using ditetrahydrofurfuryl itaconate (DTHFI), whereby the ratio of DTHFI was varied from 2.5 to 10 % by weight. Copolymerization was confirmed using FTIR spectroscopy, while SEM analysis showed the absence of micro defects and pores in the structure. The effects of the itaconate content on the absorption of fluids, the residual monomer content, thermal, dynamic-mechanical and mechanical properties (hardness, toughness, stress and elongation at break) were investigated. It was found that the addition of DTHFI significantly reduced the amount of residual methyl methacrylate, which made these materials less toxic. It was shown that increasing the DTHFI content resulted in materials with decreased glass transition temperatures, as well as with decreased storage modulus, ultimate tensile strength and impact fracture resistance; however the mechanical properties were in the rang prescribed by ADA standards, and the materials could be used in practice. The deterioration in mechanical properties was therefore worthwhile in order to gain lower toxicity of the leached monomer.",
publisher = "Serbian Chemical Soc, Belgrade",
journal = "Journal of the Serbian Chemical Society",
title = "Poly(methyl methacrylate) denture base materials modified with ditetrahydrofurfuryl itaconate: Significant applicative properties",
volume = "80",
number = "9",
pages = "1177",
doi = "10.2298/JSC150123034S"
}

Spasojević, P., Panić, V., Šešlija, S., Nikolić, V., Popović, I. G.,& Veličković, S. J.. (2015). Poly(methyl methacrylate) denture base materials modified with ditetrahydrofurfuryl itaconate: Significant applicative properties. in Journal of the Serbian Chemical Society
Serbian Chemical Soc, Belgrade., 80(9), 1177.
https://doi.org/10.2298/JSC150123034S

Spasojević P, Panić V, Šešlija S, Nikolić V, Popović IG, Veličković SJ. Poly(methyl methacrylate) denture base materials modified with ditetrahydrofurfuryl itaconate: Significant applicative properties. in Journal of the Serbian Chemical Society. 2015;80(9):1177.
doi:10.2298/JSC150123034S .

Spasojević, Pavle, Panić, Vesna, Šešlija, Sanja, Nikolić, Vladimir, Popović, Ivanka G., Veličković, Sava J., "Poly(methyl methacrylate) denture base materials modified with ditetrahydrofurfuryl itaconate: Significant applicative properties" in Journal of the Serbian Chemical Society, 80, no. 9 (2015):1177,
https://doi.org/10.2298/JSC150123034S . .

TY  - JOUR
AU  - Radoman, Tijana S
AU  - Džunuzović, Jasna
AU  - Jeremić, Katarina B.
AU  - Grgur, Branimir N.
AU  - Milicevic, Dejan S
AU  - Popović, Ivanka G.
AU  - Džunuzović, Enis S.
PY  - 2014
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1552
AB  - Epoxy resin/titanium dioxide (epoxy/TiO2) nanocomposites were obtained by incorporation of TiO2 nanoparticles surface modified with gallic acid esters in epoxy resin. TiO2 nanoparticles were obtained by acid catalyzed hydrolysis of titanium isopropoxide and their structural characterization was performed by X-ray diffraction and transmission electron microscopy. Three gallic acid esters, having different hydrophobic part, were used for surface modification of the synthesized TiO2 nanoparticles: propyl, hexyl and lauryl gallate. The gallate chemisorption onto surface of TiO2 nanoparticles was confirmed by Fourier transform infrared and ultraviolet-visible spectroscopy, while the amount of surface-bonded gallates was determined using thermogravimetric analysis. The influence of the surface modified TiO2 nanoparticles, as well as the length of hydrophobic part of the gallate used for surface modification of TiO2 nanoparticles, on glass transition temperature, barrier, dielectric and anticorrosive properties of epoxy resin was investigated by differential scanning calorimetry, water vapor transmission test, dielectric spectroscopy, electrochemical impedance spectroscopy and polarization measurements. Incorporation of surface modified TiO2 nanoparticles in epoxy resin caused increase of glass transition temperature and decrease of the water vapor permeability of epoxy resin. The water vapor transmission rate of epoxy/TiO2 nanocomposites was reduced with increasing hydrophobic part chain length of gallate ligand. Dielectric constant of examined nanocomposites was influenced by gallate used for the modification of TiO2 nanoparticles. The nanocomposites have better anticorrosive properties than pure epoxy resin, because the surface modified TiO2 nanoparticles react as oxygen scavengers, which inhibit steel corrosion by cathodic mechanism.
PB  - Elsevier Sci Ltd, Oxford
T2  - Materials & Design
T1  - Improvement of epoxy resin properties by incorporation of TiO2 nanoparticles surface modified with gallic acid esters
VL  - 62
SP  - 158
EP  - 167
DO  - 10.1016/j.matdes.2014.05.015
ER  - 

@article{
author = "Radoman, Tijana S and Džunuzović, Jasna and Jeremić, Katarina B. and Grgur, Branimir N. and Milicevic, Dejan S and Popović, Ivanka G. and Džunuzović, Enis S.",
year = "2014",
abstract = "Epoxy resin/titanium dioxide (epoxy/TiO2) nanocomposites were obtained by incorporation of TiO2 nanoparticles surface modified with gallic acid esters in epoxy resin. TiO2 nanoparticles were obtained by acid catalyzed hydrolysis of titanium isopropoxide and their structural characterization was performed by X-ray diffraction and transmission electron microscopy. Three gallic acid esters, having different hydrophobic part, were used for surface modification of the synthesized TiO2 nanoparticles: propyl, hexyl and lauryl gallate. The gallate chemisorption onto surface of TiO2 nanoparticles was confirmed by Fourier transform infrared and ultraviolet-visible spectroscopy, while the amount of surface-bonded gallates was determined using thermogravimetric analysis. The influence of the surface modified TiO2 nanoparticles, as well as the length of hydrophobic part of the gallate used for surface modification of TiO2 nanoparticles, on glass transition temperature, barrier, dielectric and anticorrosive properties of epoxy resin was investigated by differential scanning calorimetry, water vapor transmission test, dielectric spectroscopy, electrochemical impedance spectroscopy and polarization measurements. Incorporation of surface modified TiO2 nanoparticles in epoxy resin caused increase of glass transition temperature and decrease of the water vapor permeability of epoxy resin. The water vapor transmission rate of epoxy/TiO2 nanocomposites was reduced with increasing hydrophobic part chain length of gallate ligand. Dielectric constant of examined nanocomposites was influenced by gallate used for the modification of TiO2 nanoparticles. The nanocomposites have better anticorrosive properties than pure epoxy resin, because the surface modified TiO2 nanoparticles react as oxygen scavengers, which inhibit steel corrosion by cathodic mechanism.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Materials & Design",
title = "Improvement of epoxy resin properties by incorporation of TiO2 nanoparticles surface modified with gallic acid esters",
volume = "62",
pages = "158-167",
doi = "10.1016/j.matdes.2014.05.015"
}

Radoman, T. S., Džunuzović, J., Jeremić, K. B., Grgur, B. N., Milicevic, D. S., Popović, I. G.,& Džunuzović, E. S.. (2014). Improvement of epoxy resin properties by incorporation of TiO2 nanoparticles surface modified with gallic acid esters. in Materials & Design
Elsevier Sci Ltd, Oxford., 62, 158-167.
https://doi.org/10.1016/j.matdes.2014.05.015

Radoman TS, Džunuzović J, Jeremić KB, Grgur BN, Milicevic DS, Popović IG, Džunuzović ES. Improvement of epoxy resin properties by incorporation of TiO2 nanoparticles surface modified with gallic acid esters. in Materials & Design. 2014;62:158-167.
doi:10.1016/j.matdes.2014.05.015 .

Radoman, Tijana S, Džunuzović, Jasna, Jeremić, Katarina B., Grgur, Branimir N., Milicevic, Dejan S, Popović, Ivanka G., Džunuzović, Enis S., "Improvement of epoxy resin properties by incorporation of TiO2 nanoparticles surface modified with gallic acid esters" in Materials & Design, 62 (2014):158-167,
https://doi.org/10.1016/j.matdes.2014.05.015 . .

TY  - JOUR
AU  - Radoman, Tijana S.
AU  - Džunuzović, Jasna
AU  - Jeremić, Katarina B.
AU  - Marinković, Aleksandar D.
AU  - Spasojević, Pavle
AU  - Popović, Ivanka G.
AU  - Džunuzović, Enis S.
PY  - 2013
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1155
AB  - Spherical TiO2 particles of different size were dispersed in alkyd resin based on soybean oil. Four samples of TiO2 particles were used, three commercial and one obtained by acid catalyzed hydrolysis of titanium tetraisopropoxide. The size of the synthesized nanoparticles was determined by transmission electron microscopy. Surface modification of TiO2 nanoparticles was performed with propyl gallate and lauryl gallate. The influence of the size of TiO2 nanoparticles, their concentration and type of the surface modification on the rheological properties of alkyd resin was investigated. The obtained results have shown that the viscosity of the prepared dispersions was higher than the viscosity of the pure resin, increases with decreasing particle diameter and decreases with frequency increase. Surface modified particles showed higher influence on the viscosity of alkyd resin than unmodified, because their hydrodynamic volume is higher due to the presence of the adsorbed gallates, leading to the increase of effective volume fraction of particles in dispersion. For the lowest TiO2 concentration, the viscosity was higher for the sample modified with lauryl gallate, due to the higher thickness of the adsorbed layer. The increase of concentration, because of less dispersion stability of the particles modified with propyl gallate, leads to particle agglomeration. The presence of agglomerates, which was confirmed by a change in the slope of the functional dependence of storage modulus on loss modulus, leads to a rapid increase in viscosity.
AB  - Sferne čestice TiO2 različitih veličina dispergovane su u alkidnoj smoli. Površinska modifikacija nanočestica TiO2 izvedena je propil galatom i lauril galatom. Ispitivan je uticaj veličine nanočestica TiO2, koncentracije, kao i vrste površinske modifikacije na reološka svojstva alkidne smole. Dobijeno je da je viskoznost pripremljenih disperzija veća od viskoznosti čiste smole, da raste sa smanjenjem prečnika čestica i opada sa povećanjem frekvencije. Površinski modifikovane čestice imaju veći uticaj na viskoznost alkidne smole nego nemodifikovane zbog povećanja efektivnog zapreminskog udela čestica u disperziji. Za najmanju koncentraciju TiO2 viskoznost je veća kada je modifikacija izvršena lauril galatom, dok sa povećanjem koncentracije, zbog manje disperzione stabilnosti čestica modifikovanih propil galatom, dolazi do njihove aglomerizacije i naglog povećanja viskoznosti.
PB  - Association of Chemical Engineers of Serbia
T2  - Hemijska industrija
T1  - The influence of the size and surface modification of TIO2 nanoparticles on the rheological properties of alkyd resin
T1  - Uticaj veličine nanočestica TIO2 i njihove površinske modifikacije na reološka svojstva alkidne smole
VL  - 67
IS  - 6
SP  - 923
EP  - 932
DO  - 10.2298/HEMIND131106081R
ER  - 

@article{
author = "Radoman, Tijana S. and Džunuzović, Jasna and Jeremić, Katarina B. and Marinković, Aleksandar D. and Spasojević, Pavle and Popović, Ivanka G. and Džunuzović, Enis S.",
year = "2013",
abstract = "Spherical TiO2 particles of different size were dispersed in alkyd resin based on soybean oil. Four samples of TiO2 particles were used, three commercial and one obtained by acid catalyzed hydrolysis of titanium tetraisopropoxide. The size of the synthesized nanoparticles was determined by transmission electron microscopy. Surface modification of TiO2 nanoparticles was performed with propyl gallate and lauryl gallate. The influence of the size of TiO2 nanoparticles, their concentration and type of the surface modification on the rheological properties of alkyd resin was investigated. The obtained results have shown that the viscosity of the prepared dispersions was higher than the viscosity of the pure resin, increases with decreasing particle diameter and decreases with frequency increase. Surface modified particles showed higher influence on the viscosity of alkyd resin than unmodified, because their hydrodynamic volume is higher due to the presence of the adsorbed gallates, leading to the increase of effective volume fraction of particles in dispersion. For the lowest TiO2 concentration, the viscosity was higher for the sample modified with lauryl gallate, due to the higher thickness of the adsorbed layer. The increase of concentration, because of less dispersion stability of the particles modified with propyl gallate, leads to particle agglomeration. The presence of agglomerates, which was confirmed by a change in the slope of the functional dependence of storage modulus on loss modulus, leads to a rapid increase in viscosity., Sferne čestice TiO2 različitih veličina dispergovane su u alkidnoj smoli. Površinska modifikacija nanočestica TiO2 izvedena je propil galatom i lauril galatom. Ispitivan je uticaj veličine nanočestica TiO2, koncentracije, kao i vrste površinske modifikacije na reološka svojstva alkidne smole. Dobijeno je da je viskoznost pripremljenih disperzija veća od viskoznosti čiste smole, da raste sa smanjenjem prečnika čestica i opada sa povećanjem frekvencije. Površinski modifikovane čestice imaju veći uticaj na viskoznost alkidne smole nego nemodifikovane zbog povećanja efektivnog zapreminskog udela čestica u disperziji. Za najmanju koncentraciju TiO2 viskoznost je veća kada je modifikacija izvršena lauril galatom, dok sa povećanjem koncentracije, zbog manje disperzione stabilnosti čestica modifikovanih propil galatom, dolazi do njihove aglomerizacije i naglog povećanja viskoznosti.",
publisher = "Association of Chemical Engineers of Serbia",
journal = "Hemijska industrija",
title = "The influence of the size and surface modification of TIO2 nanoparticles on the rheological properties of alkyd resin, Uticaj veličine nanočestica TIO2 i njihove površinske modifikacije na reološka svojstva alkidne smole",
volume = "67",
number = "6",
pages = "923-932",
doi = "10.2298/HEMIND131106081R"
}

Radoman, T. S., Džunuzović, J., Jeremić, K. B., Marinković, A. D., Spasojević, P., Popović, I. G.,& Džunuzović, E. S.. (2013). The influence of the size and surface modification of TIO2 nanoparticles on the rheological properties of alkyd resin. in Hemijska industrija
Association of Chemical Engineers of Serbia., 67(6), 923-932.
https://doi.org/10.2298/HEMIND131106081R

Radoman TS, Džunuzović J, Jeremić KB, Marinković AD, Spasojević P, Popović IG, Džunuzović ES. The influence of the size and surface modification of TIO2 nanoparticles on the rheological properties of alkyd resin. in Hemijska industrija. 2013;67(6):923-932.
doi:10.2298/HEMIND131106081R .

Radoman, Tijana S., Džunuzović, Jasna, Jeremić, Katarina B., Marinković, Aleksandar D., Spasojević, Pavle, Popović, Ivanka G., Džunuzović, Enis S., "The influence of the size and surface modification of TIO2 nanoparticles on the rheological properties of alkyd resin" in Hemijska industrija, 67, no. 6 (2013):923-932,
https://doi.org/10.2298/HEMIND131106081R . .

TY  - JOUR
AU  - Marinović, Sanja
AU  - Popović, Ivanka G.
AU  - Dunjic, B.
AU  - Tasic, S.
AU  - Bozic, B.
AU  - Jovanović, Dušan M.
PY  - 2010
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/635
AB  - The aim of this study was to investigate the influence of different components of interpenetrating polymer networks (IPNs) on their behavior in dual curing automotive applications. Dual curing is one of possible ways to obtain fast curing, scratch resistant coatings for use in OEM and car refinish applications. Dual curing systems, upon hardening, represent interpenetrating networks (IPNs) [1]. IPN's were obtained using novel acrylate-terminated hyperbranched polyester with high functionality and compared to classical 2-pack polyurethane clear coat. In our previous manuscript [1] we investigated the influence of the acrylated hyperbranched polyester (HBP(A)) content in dual curing systems. In this article we studied the influence of the reactive diluent on dual curing compositions. To this end, we have chosen IPN with 50/50 weigth ratio of polyurethane (PU) and polyacrylic (PA) component. In order to determine more clearly the role of the HBP(A) in one IPN HBP(A) was changed with hexane diol diacrylate (HDDA), keeping the same ratio with EHA. The IPNs were characterized by dynamic-mechanical analysis (DMA), differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The mechanical properties of the IPNs were also investigated. The IPN with HDDA as reactive diluent, had the best performance. IPN with H BP(A) had the highest glass transition temperature Tg and the highest crosslink density, but it did not have the highest hardness.
PB  - Elsevier Science Sa, Lausanne
T2  - Progress in Organic Coatings
T1  - The influence of different components on interpenetrating polymer network's (IPN's) characteristics as automotive top coats
VL  - 68
IS  - 4
SP  - 293
EP  - 298
DO  - 10.1016/j.porgcoat.2010.03.010
ER  - 

@article{
author = "Marinović, Sanja and Popović, Ivanka G. and Dunjic, B. and Tasic, S. and Bozic, B. and Jovanović, Dušan M.",
year = "2010",
abstract = "The aim of this study was to investigate the influence of different components of interpenetrating polymer networks (IPNs) on their behavior in dual curing automotive applications. Dual curing is one of possible ways to obtain fast curing, scratch resistant coatings for use in OEM and car refinish applications. Dual curing systems, upon hardening, represent interpenetrating networks (IPNs) [1]. IPN's were obtained using novel acrylate-terminated hyperbranched polyester with high functionality and compared to classical 2-pack polyurethane clear coat. In our previous manuscript [1] we investigated the influence of the acrylated hyperbranched polyester (HBP(A)) content in dual curing systems. In this article we studied the influence of the reactive diluent on dual curing compositions. To this end, we have chosen IPN with 50/50 weigth ratio of polyurethane (PU) and polyacrylic (PA) component. In order to determine more clearly the role of the HBP(A) in one IPN HBP(A) was changed with hexane diol diacrylate (HDDA), keeping the same ratio with EHA. The IPNs were characterized by dynamic-mechanical analysis (DMA), differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The mechanical properties of the IPNs were also investigated. The IPN with HDDA as reactive diluent, had the best performance. IPN with H BP(A) had the highest glass transition temperature Tg and the highest crosslink density, but it did not have the highest hardness.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Progress in Organic Coatings",
title = "The influence of different components on interpenetrating polymer network's (IPN's) characteristics as automotive top coats",
volume = "68",
number = "4",
pages = "293-298",
doi = "10.1016/j.porgcoat.2010.03.010"
}

Marinović, S., Popović, I. G., Dunjic, B., Tasic, S., Bozic, B.,& Jovanović, D. M.. (2010). The influence of different components on interpenetrating polymer network's (IPN's) characteristics as automotive top coats. in Progress in Organic Coatings
Elsevier Science Sa, Lausanne., 68(4), 293-298.
https://doi.org/10.1016/j.porgcoat.2010.03.010

Marinović S, Popović IG, Dunjic B, Tasic S, Bozic B, Jovanović DM. The influence of different components on interpenetrating polymer network's (IPN's) characteristics as automotive top coats. in Progress in Organic Coatings. 2010;68(4):293-298.
doi:10.1016/j.porgcoat.2010.03.010 .

Marinović, Sanja, Popović, Ivanka G., Dunjic, B., Tasic, S., Bozic, B., Jovanović, Dušan M., "The influence of different components on interpenetrating polymer network's (IPN's) characteristics as automotive top coats" in Progress in Organic Coatings, 68, no. 4 (2010):293-298,
https://doi.org/10.1016/j.porgcoat.2010.03.010 . .

TY  - JOUR
AU  - Simić, Sanja
AU  - Dunjić, Branko
AU  - Tasić, S.
AU  - Božić, Bojan
AU  - Jovanović, Dušan M.
AU  - Popović, Ivanka G.
PY  - 2008
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2660
AB  - The aim of this study was to investigate the possibility of using acrylated hyperbranched polyesters (HBP) as UV curable component in dual curing automotive applications. Dual curing is one of possible ways to obtain fast curing, scratch resistant coatings for use in OEM and car refinish applications. Dual curing systems, upon hardening, can give interpenetrating networks (IPNs). All the IPNs were obtained by UV-thermal dual cure process and they consisted of an UV curable acrylic component and a classic 2-pack urethane component. The acrylic component was acrylated hyperbranched polyester (HBP(A)) and 2-ethyl hexyl acrylate (EHA). The classic 2-pack urethane component consisted of a hydroxyl functional acrylate copolymer (HA) and Desmodur® N3390. The weight ratio of HBP(A) and EHA in the IPNs was varied from 100/0 to 25/75, while the urethane component remained the same in all the IPN samples. The IPNs were characterized by dynamic-mechanical analysis (DMA), differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The mechanical properties of the IPNs were also investigated. A single glass transition temperature, Tg, indicated that a homogeneous material with no separation domain was obtained. DMA showed that with increasing HBP(A) in the IPNs, the crosslink density increased, while the flexibility decreased. The data obtained by DMA and DSC showed a decrease of the Tg values with increasing amount of HBP(A). There were slight differences in the thermal stability of the IPNs.
PB  - Elsevier
T2  - Progress in Organic Coatings
T1  - Synthesis and characterization of interpenetrating polymer networks with hyperbranched polymers through thermal-UV dual curing
VL  - 63
IS  - 1
SP  - 43
EP  - 48
DO  - 10.1016/j.porgcoat.2008.04.006
ER  - 

@article{
author = "Simić, Sanja and Dunjić, Branko and Tasić, S. and Božić, Bojan and Jovanović, Dušan M. and Popović, Ivanka G.",
year = "2008",
abstract = "The aim of this study was to investigate the possibility of using acrylated hyperbranched polyesters (HBP) as UV curable component in dual curing automotive applications. Dual curing is one of possible ways to obtain fast curing, scratch resistant coatings for use in OEM and car refinish applications. Dual curing systems, upon hardening, can give interpenetrating networks (IPNs). All the IPNs were obtained by UV-thermal dual cure process and they consisted of an UV curable acrylic component and a classic 2-pack urethane component. The acrylic component was acrylated hyperbranched polyester (HBP(A)) and 2-ethyl hexyl acrylate (EHA). The classic 2-pack urethane component consisted of a hydroxyl functional acrylate copolymer (HA) and Desmodur® N3390. The weight ratio of HBP(A) and EHA in the IPNs was varied from 100/0 to 25/75, while the urethane component remained the same in all the IPN samples. The IPNs were characterized by dynamic-mechanical analysis (DMA), differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The mechanical properties of the IPNs were also investigated. A single glass transition temperature, Tg, indicated that a homogeneous material with no separation domain was obtained. DMA showed that with increasing HBP(A) in the IPNs, the crosslink density increased, while the flexibility decreased. The data obtained by DMA and DSC showed a decrease of the Tg values with increasing amount of HBP(A). There were slight differences in the thermal stability of the IPNs.",
publisher = "Elsevier",
journal = "Progress in Organic Coatings",
title = "Synthesis and characterization of interpenetrating polymer networks with hyperbranched polymers through thermal-UV dual curing",
volume = "63",
number = "1",
pages = "43-48",
doi = "10.1016/j.porgcoat.2008.04.006"
}

Simić, S., Dunjić, B., Tasić, S., Božić, B., Jovanović, D. M.,& Popović, I. G.. (2008). Synthesis and characterization of interpenetrating polymer networks with hyperbranched polymers through thermal-UV dual curing. in Progress in Organic Coatings
Elsevier., 63(1), 43-48.
https://doi.org/10.1016/j.porgcoat.2008.04.006

Simić S, Dunjić B, Tasić S, Božić B, Jovanović DM, Popović IG. Synthesis and characterization of interpenetrating polymer networks with hyperbranched polymers through thermal-UV dual curing. in Progress in Organic Coatings. 2008;63(1):43-48.
doi:10.1016/j.porgcoat.2008.04.006 .

Simić, Sanja, Dunjić, Branko, Tasić, S., Božić, Bojan, Jovanović, Dušan M., Popović, Ivanka G., "Synthesis and characterization of interpenetrating polymer networks with hyperbranched polymers through thermal-UV dual curing" in Progress in Organic Coatings, 63, no. 1 (2008):43-48,
https://doi.org/10.1016/j.porgcoat.2008.04.006 . .

TY  - JOUR
AU  - Milovanović, Miloš B.
AU  - Trifunović, Snežana
AU  - Katsikas, Lynne
AU  - Popović, Ivanka G.
PY  - 2007
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4301
AB  - The free radical copolymerisation of itaconic anhydride and methyl methacrylate in solution was studied at 60°C. The copolymer composition was determined by 1H-NMR spectroscopy and the obtained monomer reactivity ratios were calculated, rITA = 1.35±0.11; rMMA = 0.22±0.22 (by the Fineman-Ross method) and rITA = 1.27±0.38; rMMA = 0.10±0.05 (by the Mayo-Lewis method). The synthesised copolymers were modified by reaction with di-n-butyl amine. The copolymer composition after amidation was determined by elemental analysis via the nitrogen content. Amidation of the anhydride units in the copolymers with di-n-butyl amine resulted in complete conversion to itaconamic acid.
AB  - Испитивана је радикална кополимеризација анхидрида итаконске киселине и метил-метакрилата у раствору на 60 °C. Састав кополимера одређен је 1H-NMR спектроскопијом и израчунати су односи реактивности мономера, rITA = 1.35±0.11; rMMA = 0.22±0.22 (методом Фајнман–Рос) и rITA = 1.27±0.38; rMMA = 0.10±0.05 (методом Мејо–Луис). Синтетизовани кополимери су модификовани реакцијом са дибутиламином. Након амидације састав кополимера одређен је елементалном анализом на основу садржаја азота. Амидацијом анхидридних јединица у кополимерима дибутил-амином настале су комономерне јединице итаконамичне киселине.
PB  - Belgrade : Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - Preparation and modification of itaconic anhydride-methyl methacrylate copolymers
T1  - Синтеза и модификација кополимера анхидрида  итаконске киселине и метил-метакрилата
VL  - 72
IS  - 12
SP  - 1507
EP  - 1514
DO  - 10.2298/JSC0712507M
ER  - 

@article{
author = "Milovanović, Miloš B. and Trifunović, Snežana and Katsikas, Lynne and Popović, Ivanka G.",
year = "2007",
abstract = "The free radical copolymerisation of itaconic anhydride and methyl methacrylate in solution was studied at 60°C. The copolymer composition was determined by 1H-NMR spectroscopy and the obtained monomer reactivity ratios were calculated, rITA = 1.35±0.11; rMMA = 0.22±0.22 (by the Fineman-Ross method) and rITA = 1.27±0.38; rMMA = 0.10±0.05 (by the Mayo-Lewis method). The synthesised copolymers were modified by reaction with di-n-butyl amine. The copolymer composition after amidation was determined by elemental analysis via the nitrogen content. Amidation of the anhydride units in the copolymers with di-n-butyl amine resulted in complete conversion to itaconamic acid., Испитивана је радикална кополимеризација анхидрида итаконске киселине и метил-метакрилата у раствору на 60 °C. Састав кополимера одређен је 1H-NMR спектроскопијом и израчунати су односи реактивности мономера, rITA = 1.35±0.11; rMMA = 0.22±0.22 (методом Фајнман–Рос) и rITA = 1.27±0.38; rMMA = 0.10±0.05 (методом Мејо–Луис). Синтетизовани кополимери су модификовани реакцијом са дибутиламином. Након амидације састав кополимера одређен је елементалном анализом на основу садржаја азота. Амидацијом анхидридних јединица у кополимерима дибутил-амином настале су комономерне јединице итаконамичне киселине.",
publisher = "Belgrade : Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Preparation and modification of itaconic anhydride-methyl methacrylate copolymers, Синтеза и модификација кополимера анхидрида  итаконске киселине и метил-метакрилата",
volume = "72",
number = "12",
pages = "1507-1514",
doi = "10.2298/JSC0712507M"
}

Milovanović, M. B., Trifunović, S., Katsikas, L.,& Popović, I. G.. (2007). Preparation and modification of itaconic anhydride-methyl methacrylate copolymers. in Journal of the Serbian Chemical Society
Belgrade : Serbian Chemical Society., 72(12), 1507-1514.
https://doi.org/10.2298/JSC0712507M

Milovanović MB, Trifunović S, Katsikas L, Popović IG. Preparation and modification of itaconic anhydride-methyl methacrylate copolymers. in Journal of the Serbian Chemical Society. 2007;72(12):1507-1514.
doi:10.2298/JSC0712507M .

Milovanović, Miloš B., Trifunović, Snežana, Katsikas, Lynne, Popović, Ivanka G., "Preparation and modification of itaconic anhydride-methyl methacrylate copolymers" in Journal of the Serbian Chemical Society, 72, no. 12 (2007):1507-1514,
https://doi.org/10.2298/JSC0712507M . .