TY  - CONF
AU  - Pantić, Olga
AU  - Panić, Vesna
AU  - Marković, Maja
AU  - Spasojević Savković, Milica
AU  - Spasojević, Pavle
AU  - Savić, Sanja
AU  - Kalagasidis Krušić, Melina
PY  - 2024
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7653
AB  - Ekološki prihvatljive nezasićene poliestarske smole sa svojstvima sličnim 
 komercijalnim smolama dobijenim iz petrohemijskih sirovina u fokusu su novijih istraživanja zasnovanih na principima održivog razvoja. Jedan od glavnih izazova pri umreževanju je pravilan izbor inicijator/aktivator sistema za reakciju umrežavanja. U ovom radu je ispitan uticaj odnosa metil etil keton peroksida kao inicijatora i kobalt oktoata kao aktivatora na svojstva sintetisane nezasićene poliestarske smole na bazi itakonata. Utvrđen je optimalan sastav sistema inicijator/aktivator od 1,5:1,0 mas.%, pri kom je umrežena smola najveće zatezne 
čvrstoće i stepena umreženja. Pokazano je da povećanjem udela inicijatora u datom sistemu inicijator/aktivator od samo 4 puta dolazi do desetostrukog povećanja vrednosti zatezne čvrstoće.
AB  - Novel research guided by sustainable development principles aims to generate eco-friendly unsaturated polyester resins with comparable properties to commercial petroleum-based resins. One of the main challenges encountered is the proper selection of the 
initiator/activator system for the crosslinking reaction. In this research, the influence of the ratio of methyl ethyl ketone peroxide as an initiator and cobalt octoate as an activator on the properties of the synthesized itaconate based unsaturated polyester resin was studied. The optimal composition of the initiator/activator system was found to be 1.5:1.0 wt.%, at which the cured resin showed the highest tensile strength and degree of crosslinking. It was further shown that a fourfold increase of initiator in a given initiator/activator system resulted in increased value of tensile strength by an order of magnitude.
PB  - Srpsko hemijsko društvo
PB  - Serbian Chemical Society
C3  - 60. Savetovanje Srpskog hemijskog društva - Kratki izvodi radova, Niš 8. i 9. jun 2024. godine
T1  - Optimizacija procesa umrežavanja ekološki prihvatljive nezasićene  poliestarske smole
T1  - The curing process optimization of an eco-friendly unsaturated  polyester resin
SP  - 127
EP  - 1127
ER  - 

@conference{
author = "Pantić, Olga and Panić, Vesna and Marković, Maja and Spasojević Savković, Milica and Spasojević, Pavle and Savić, Sanja and Kalagasidis Krušić, Melina",
year = "2024",
abstract = "Ekološki prihvatljive nezasićene poliestarske smole sa svojstvima sličnim 
 komercijalnim smolama dobijenim iz petrohemijskih sirovina u fokusu su novijih istraživanja zasnovanih na principima održivog razvoja. Jedan od glavnih izazova pri umreževanju je pravilan izbor inicijator/aktivator sistema za reakciju umrežavanja. U ovom radu je ispitan uticaj odnosa metil etil keton peroksida kao inicijatora i kobalt oktoata kao aktivatora na svojstva sintetisane nezasićene poliestarske smole na bazi itakonata. Utvrđen je optimalan sastav sistema inicijator/aktivator od 1,5:1,0 mas.%, pri kom je umrežena smola najveće zatezne 
čvrstoće i stepena umreženja. Pokazano je da povećanjem udela inicijatora u datom sistemu inicijator/aktivator od samo 4 puta dolazi do desetostrukog povećanja vrednosti zatezne čvrstoće., Novel research guided by sustainable development principles aims to generate eco-friendly unsaturated polyester resins with comparable properties to commercial petroleum-based resins. One of the main challenges encountered is the proper selection of the 
initiator/activator system for the crosslinking reaction. In this research, the influence of the ratio of methyl ethyl ketone peroxide as an initiator and cobalt octoate as an activator on the properties of the synthesized itaconate based unsaturated polyester resin was studied. The optimal composition of the initiator/activator system was found to be 1.5:1.0 wt.%, at which the cured resin showed the highest tensile strength and degree of crosslinking. It was further shown that a fourfold increase of initiator in a given initiator/activator system resulted in increased value of tensile strength by an order of magnitude.",
publisher = "Srpsko hemijsko društvo, Serbian Chemical Society",
journal = "60. Savetovanje Srpskog hemijskog društva - Kratki izvodi radova, Niš 8. i 9. jun 2024. godine",
title = "Optimizacija procesa umrežavanja ekološki prihvatljive nezasićene  poliestarske smole, The curing process optimization of an eco-friendly unsaturated  polyester resin",
pages = "127-1127"
}

Pantić, O., Panić, V., Marković, M., Spasojević Savković, M., Spasojević, P., Savić, S.,& Kalagasidis Krušić, M.. (2024). Optimizacija procesa umrežavanja ekološki prihvatljive nezasićene  poliestarske smole. in 60. Savetovanje Srpskog hemijskog društva - Kratki izvodi radova, Niš 8. i 9. jun 2024. godine
Srpsko hemijsko društvo., 127-1127.

Pantić O, Panić V, Marković M, Spasojević Savković M, Spasojević P, Savić S, Kalagasidis Krušić M. Optimizacija procesa umrežavanja ekološki prihvatljive nezasićene  poliestarske smole. in 60. Savetovanje Srpskog hemijskog društva - Kratki izvodi radova, Niš 8. i 9. jun 2024. godine. 2024;:127-1127..

Pantić, Olga, Panić, Vesna, Marković, Maja, Spasojević Savković, Milica, Spasojević, Pavle, Savić, Sanja, Kalagasidis Krušić, Melina, "Optimizacija procesa umrežavanja ekološki prihvatljive nezasićene  poliestarske smole" in 60. Savetovanje Srpskog hemijskog društva - Kratki izvodi radova, Niš 8. i 9. jun 2024. godine (2024):127-1127.

TY  - CONF
AU  - Pantić, Olga
AU  - Panić, Vesna
AU  - Marković, Maja
AU  - Spasojević Savković, Milica
AU  - Savić, Sanja
AU  - Kalagasidis Krušić, Melina
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6958
AB  - Biocomposites are materials that are composed of a matrix and fillers both of which derived from renewable resources. They offer an alternative to traditional petroleum-based composites and have gained interest due to potential environmental benefits and sustainability. Guided by this idea, itaconic and succinic acids and propylene glycol were used in the synthesis of a biobased unsaturated polyester, diluted with biobased reactive diluent, dimethyl itaconate, to cure fully biobased unsaturated polyester resin (UPR). Despite having a low environmental impact, the mechanical properties of biobased UPRs are not considered commercially viable compared to their petroleum-based counterparts. To lessen the discrepancy between the two, nanocellulose (NC) was incorporated into the biobased UPR in two ways. Firstly, NC was added during synthesis, while secondly it was added after the synthesis of UPR was completed. Both series implied the use of three different quantities of NC (1, 2, 3 wt.%). FTIR spectroscopy, gel content analysis, SEM, dynamic mechanical analysis, and uniaxial tensile test were used to characterize obtained biocomposites. It was demonstrated that when NC was added during the synthesis, it had no effect on UPR viscosity. On the other hand, adding NC after the synthesis significantly increased viscosity. Overall results showed that higher quantities of NC increased tensile strength, storage modulus at lower frequencies, and decreased glass transition temperature.
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  - Advancing Biocomposites: Introduction of Nanocellulose as a Sustainable Filler of Biobased Unsaturated Polyester Resins
SP  - 52
EP  - 52
UR  - https://hdl.handle.net/21.15107/rcub_cer_6958
ER  - 

@conference{
author = "Pantić, Olga and Panić, Vesna and Marković, Maja and Spasojević Savković, Milica and Savić, Sanja and Kalagasidis Krušić, Melina",
year = "2023",
abstract = "Biocomposites are materials that are composed of a matrix and fillers both of which derived from renewable resources. They offer an alternative to traditional petroleum-based composites and have gained interest due to potential environmental benefits and sustainability. Guided by this idea, itaconic and succinic acids and propylene glycol were used in the synthesis of a biobased unsaturated polyester, diluted with biobased reactive diluent, dimethyl itaconate, to cure fully biobased unsaturated polyester resin (UPR). Despite having a low environmental impact, the mechanical properties of biobased UPRs are not considered commercially viable compared to their petroleum-based counterparts. To lessen the discrepancy between the two, nanocellulose (NC) was incorporated into the biobased UPR in two ways. Firstly, NC was added during synthesis, while secondly it was added after the synthesis of UPR was completed. Both series implied the use of three different quantities of NC (1, 2, 3 wt.%). FTIR spectroscopy, gel content analysis, SEM, dynamic mechanical analysis, and uniaxial tensile test were used to characterize obtained biocomposites. It was demonstrated that when NC was added during the synthesis, it had no effect on UPR viscosity. On the other hand, adding NC after the synthesis significantly increased viscosity. Overall results showed that higher quantities of NC increased tensile strength, storage modulus at lower frequencies, and decreased glass transition temperature.",
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 = "Advancing Biocomposites: Introduction of Nanocellulose as a Sustainable Filler of Biobased Unsaturated Polyester Resins",
pages = "52-52",
url = "https://hdl.handle.net/21.15107/rcub_cer_6958"
}

Pantić, O., Panić, V., Marković, M., Spasojević Savković, M., Savić, S.,& Kalagasidis Krušić, M.. (2023). Advancing Biocomposites: Introduction of Nanocellulose as a Sustainable Filler of Biobased Unsaturated Polyester Resins. 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., 52-52.
https://hdl.handle.net/21.15107/rcub_cer_6958

Pantić O, Panić V, Marković M, Spasojević Savković M, Savić S, Kalagasidis Krušić M. Advancing Biocomposites: Introduction of Nanocellulose as a Sustainable Filler of Biobased Unsaturated Polyester Resins. in Book of Abstracts - 29thPolyChar - World Forum on Advanced Materials, 26 - 29 September 2023, Nice, France. 2023;:52-52.
https://hdl.handle.net/21.15107/rcub_cer_6958 .

Pantić, Olga, Panić, Vesna, Marković, Maja, Spasojević Savković, Milica, Savić, Sanja, Kalagasidis Krušić, Melina, "Advancing Biocomposites: Introduction of Nanocellulose as a Sustainable Filler of Biobased Unsaturated Polyester Resins" in Book of Abstracts - 29thPolyChar - World Forum on Advanced Materials, 26 - 29 September 2023, Nice, France (2023):52-52,
https://hdl.handle.net/21.15107/rcub_cer_6958 .

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 .