TY  - JOUR
AU  - Pergal, Marija
AU  - Gojgić-Cvijović, Gordana
AU  - Steinhart, Miloš
AU  - Manojlović, Dragan
AU  - Ostojić, Sanja
AU  - Pezo, Lato
AU  - Špírková, Milena
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5237
AB  - A series of novel polyurethane network/organoclay nanocomposites (PUN-NCs) with different soft segment contents (30–60 wt%) was prepared by in situ polymerization in solution and characterized. PU network (PUN) was made from poly(dimethylsiloxane)-based macrodiol as the soft segment and 4,4′-methylenediphenyldiisocyanate and hyperbranched polyester of the third pseudo generation as the hard segment. Nanocomposites were obtained by dispersion of organically modified montmorillonite (Cloisite 30B) nanofiller (0.5 wt%). The influence of the soft segment content on the functional properties of PUN-NCs was studied by Fourier transform infrared (FTIR), small-angle and near wide-angle X-ray scattering (SWAXS), thermogravimetric analysis (TGA), dynamic mechanical thermal analyses (DMTA), differential scanning calorimetry (DSC), nanoindentation, atomic force microscopy (AFM), scanning electron microscopy (SEM), and swelling behavior, water absorption and contact angle measurements. The biodegradation process was evaluated using mixed cultures of microorganisms that originated from soil. Mechanically strong PUN-NC materials in the form of films were obtained, pointing to good dispersion and the existence of exfoliated morphology of Cloisite 30B within the PUN matrix, and the nanocomposites with the abovementioned characteristics were obtained as a function of the soft segment content. The decrease of the soft segment content induced a higher degree of phase separated microstructure, increase of Young's modulus, hardness, plasticity, storage modulus, glass transition temperature, surface free energy and swelling ability in tetrahydrofuran, but at the same time, it is responsible for the decrease of crosslinking density and hydrophobicity of PUN-NCs. By choosing adequate soft segment content, the prepared materials can potentially be designed for coating applications, such as top coating materials in environmental conditions.
PB  - Elsevier
T2  - Progress in Organic Coatings
T1  - Novel polyurethane network/organoclay nanocomposites: Microstructure and physicochemical properties
VL  - 163
IS  - 106664
DO  - 10.1016/j.porgcoat.2021.106664
ER  - 

@article{
author = "Pergal, Marija and Gojgić-Cvijović, Gordana and Steinhart, Miloš and Manojlović, Dragan and Ostojić, Sanja and Pezo, Lato and Špírková, Milena",
year = "2022",
abstract = "A series of novel polyurethane network/organoclay nanocomposites (PUN-NCs) with different soft segment contents (30–60 wt%) was prepared by in situ polymerization in solution and characterized. PU network (PUN) was made from poly(dimethylsiloxane)-based macrodiol as the soft segment and 4,4′-methylenediphenyldiisocyanate and hyperbranched polyester of the third pseudo generation as the hard segment. Nanocomposites were obtained by dispersion of organically modified montmorillonite (Cloisite 30B) nanofiller (0.5 wt%). The influence of the soft segment content on the functional properties of PUN-NCs was studied by Fourier transform infrared (FTIR), small-angle and near wide-angle X-ray scattering (SWAXS), thermogravimetric analysis (TGA), dynamic mechanical thermal analyses (DMTA), differential scanning calorimetry (DSC), nanoindentation, atomic force microscopy (AFM), scanning electron microscopy (SEM), and swelling behavior, water absorption and contact angle measurements. The biodegradation process was evaluated using mixed cultures of microorganisms that originated from soil. Mechanically strong PUN-NC materials in the form of films were obtained, pointing to good dispersion and the existence of exfoliated morphology of Cloisite 30B within the PUN matrix, and the nanocomposites with the abovementioned characteristics were obtained as a function of the soft segment content. The decrease of the soft segment content induced a higher degree of phase separated microstructure, increase of Young's modulus, hardness, plasticity, storage modulus, glass transition temperature, surface free energy and swelling ability in tetrahydrofuran, but at the same time, it is responsible for the decrease of crosslinking density and hydrophobicity of PUN-NCs. By choosing adequate soft segment content, the prepared materials can potentially be designed for coating applications, such as top coating materials in environmental conditions.",
publisher = "Elsevier",
journal = "Progress in Organic Coatings",
title = "Novel polyurethane network/organoclay nanocomposites: Microstructure and physicochemical properties",
volume = "163",
number = "106664",
doi = "10.1016/j.porgcoat.2021.106664"
}

Pergal, M., Gojgić-Cvijović, G., Steinhart, M., Manojlović, D., Ostojić, S., Pezo, L.,& Špírková, M.. (2022). Novel polyurethane network/organoclay nanocomposites: Microstructure and physicochemical properties. in Progress in Organic Coatings
Elsevier., 163(106664).
https://doi.org/10.1016/j.porgcoat.2021.106664

Pergal M, Gojgić-Cvijović G, Steinhart M, Manojlović D, Ostojić S, Pezo L, Špírková M. Novel polyurethane network/organoclay nanocomposites: Microstructure and physicochemical properties. in Progress in Organic Coatings. 2022;163(106664).
doi:10.1016/j.porgcoat.2021.106664 .

Pergal, Marija, Gojgić-Cvijović, Gordana, Steinhart, Miloš, Manojlović, Dragan, Ostojić, Sanja, Pezo, Lato, Špírková, Milena, "Novel polyurethane network/organoclay nanocomposites: Microstructure and physicochemical properties" in Progress in Organic Coatings, 163, no. 106664 (2022),
https://doi.org/10.1016/j.porgcoat.2021.106664 . .

TY  - JOUR
AU  - Pergal, Marija
AU  - Brkljačić, Jelena
AU  - Tovilović-Kovačević, Gordana
AU  - Špírková, Milena
AU  - Kodranov, Igor
AU  - Manojlović, Dragan
AU  - Ostojić, Sanja
AU  - Knežević, Nikola Ž.
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4016
AB  - Novel polyurethane nanocomposite (PUN) materials containing different surface-functionalized mesoporous silica nanoparticles (MSNs) were prepared by in situ polymerization methodology. Polyurethane network was formed from poly(dimethylsiloxane)-based macrodiol (PDMS), 4,4′-methylenediphenyldiisocyanate (MDI), and hyperbranched polyester of the second pseudo-generation (BH-20; used as crosslinking agent). PU and PU/MSN nanocomposites contained equal ratios of soft PDMS and hard MDI-BH-20 segments. Non-functionalized and surface-functionalized (with 3-(trihydroxysilyl)propyl methylphosphonate (FOMSN) and 2-[methoxy(polyethyleneoxy)6−9propyl]trimethoxysilane (PEGMSN)) MSNs were used as the nanofillers at a concentration of 1 wt%. Prepared materials were characterized by Fourier transform infrared (FTIR) spectroscopy, atomic force microscopy (AFM), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), dynamic mechanical thermal analyses (DMTA), nanoindentation, equilibrium swelling and water absorption measurements. Characteristics of the prepared PUNs when in contact with a biological environment were assessed through testing their biocompatibility, protein adsorption and adhesion of endothelial cells. The favourable influence of MSNs on the physico-chemical and biological characteristics of these novel PUN materials was identified, which evidences their vast applicability potential as coatings for medical devices and implants.
PB  - Elsevier
T2  - Progress in Organic Coatings
T1  - Effect of mesoporous silica nanoparticles on the properties of polyurethane network composites
VL  - 151
SP  - 106049
DO  - 10.1016/j.porgcoat.2020.106049
ER  - 

@article{
author = "Pergal, Marija and Brkljačić, Jelena and Tovilović-Kovačević, Gordana and Špírková, Milena and Kodranov, Igor and Manojlović, Dragan and Ostojić, Sanja and Knežević, Nikola Ž.",
year = "2021",
abstract = "Novel polyurethane nanocomposite (PUN) materials containing different surface-functionalized mesoporous silica nanoparticles (MSNs) were prepared by in situ polymerization methodology. Polyurethane network was formed from poly(dimethylsiloxane)-based macrodiol (PDMS), 4,4′-methylenediphenyldiisocyanate (MDI), and hyperbranched polyester of the second pseudo-generation (BH-20; used as crosslinking agent). PU and PU/MSN nanocomposites contained equal ratios of soft PDMS and hard MDI-BH-20 segments. Non-functionalized and surface-functionalized (with 3-(trihydroxysilyl)propyl methylphosphonate (FOMSN) and 2-[methoxy(polyethyleneoxy)6−9propyl]trimethoxysilane (PEGMSN)) MSNs were used as the nanofillers at a concentration of 1 wt%. Prepared materials were characterized by Fourier transform infrared (FTIR) spectroscopy, atomic force microscopy (AFM), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), dynamic mechanical thermal analyses (DMTA), nanoindentation, equilibrium swelling and water absorption measurements. Characteristics of the prepared PUNs when in contact with a biological environment were assessed through testing their biocompatibility, protein adsorption and adhesion of endothelial cells. The favourable influence of MSNs on the physico-chemical and biological characteristics of these novel PUN materials was identified, which evidences their vast applicability potential as coatings for medical devices and implants.",
publisher = "Elsevier",
journal = "Progress in Organic Coatings",
title = "Effect of mesoporous silica nanoparticles on the properties of polyurethane network composites",
volume = "151",
pages = "106049",
doi = "10.1016/j.porgcoat.2020.106049"
}

Pergal, M., Brkljačić, J., Tovilović-Kovačević, G., Špírková, M., Kodranov, I., Manojlović, D., Ostojić, S.,& Knežević, N. Ž.. (2021). Effect of mesoporous silica nanoparticles on the properties of polyurethane network composites. in Progress in Organic Coatings
Elsevier., 151, 106049.
https://doi.org/10.1016/j.porgcoat.2020.106049

Pergal M, Brkljačić J, Tovilović-Kovačević G, Špírková M, Kodranov I, Manojlović D, Ostojić S, Knežević NŽ. Effect of mesoporous silica nanoparticles on the properties of polyurethane network composites. in Progress in Organic Coatings. 2021;151:106049.
doi:10.1016/j.porgcoat.2020.106049 .

Pergal, Marija, Brkljačić, Jelena, Tovilović-Kovačević, Gordana, Špírková, Milena, Kodranov, Igor, Manojlović, Dragan, Ostojić, Sanja, Knežević, Nikola Ž., "Effect of mesoporous silica nanoparticles on the properties of polyurethane network composites" in Progress in Organic Coatings, 151 (2021):106049,
https://doi.org/10.1016/j.porgcoat.2020.106049 . .

TY  - JOUR
AU  - Pergal, Marija
AU  - Džunuzović, Jasna
AU  - Špírková, Milena
AU  - Poręba, Rafał
AU  - Steinhart, Miloš
AU  - Pergal, Miodrag M.
AU  - Ostojić, Sanja
PY  - 2013
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1158
AB  - Two series of polyurethane films based on hyperbranched polyester of the second pseudo-generation (Boltorn®), 4,4'-methylenediphenyl diisocyanate and two different siloxane prepolymers, α,ω-dihydroxy-(ethylene oxide-poly(dimethylsiloxane)-ethylene oxide)(EO-PDMS-EO) and α,ω-dihydroxypropyl-poly(dimethylsiloxane) (HP-PDMS), were prepared by two-step polymerization in solution. The influence of the type and content of soft segment on the morphology, thermomechanical and surface properties of the synthesized polyurethanes was studied by atomic force microscopy (AFM), small-angle X-ray scattering (SAXS), scanning electron microscopy (SEM), dynamic mechanical thermal analysis (DMTA) and water absorption measurements. It was found that these techniques confirmed existence of microphase separated morphology. Synthesized polyurethanes exhibited two glass transition temperatures and one second relaxation process. The results showed that polyurethanes based on HP-PDMS had higher surface roughness, better microphase separation and waterproof performances. Samples synthesized with lower PDMS content had less hydrophobic surface, but higher crosslinking density and better thermomechanical properties.
AB  - U ovom radu pripremane su dve serije poliuretanskih filmova na bazi hiperrazgranatog poliestra druge pseudo generacije (Boltron), 4,4¢-metilendifenildiizocijanata i dva različita iloksanska pretpolimera kao što su a, ω-dihidroksi- (etilenoksid-poli(dimetilsiloksan)-etilenoksid)(EO-PDMS-EO) i a,ω-dihidroksipro-pilpoli(dimetilsiloksan)(HP-PDMS), dvostepenom polimerizacijom u rastvoru. Uticaj vrste i sadržaja mekog segmenta na morfologiju, termomehanička i površinska svojstva sintetisanih poliuretana je proučavan pomoću mikroskopije atomske sila (AFM), rasipanja X-zraka pod malim uglovima (SAXS), skenirajuće elektronske mikroskopije (SEM), dinamičko mehaničke termičke analize (DMTA) i merenja količine apsorbovane vode. Nađeno je da primenjene tehnike potvrđuju postojanje morfologije mikrofaznog razdvajanja. Sintetisani poliuretani pokazivali su dve temperature ostakljivanja i jedan sekundarni relaksacioni proces. Rezultati su pokazali da poliuretani na bazi HP-PDMS su imali veći koeficijent hrapavosti, bolje mikrofazno razdvajanje i bolju otpornost prema vodi. Uzorci sintetisani sa nižim sadržajem PDMS-a su imali manju hidrofobnost, ali veću gustinu umrežavanja i bolja termomehanička svojstva.
PB  - Association of Chemical Engineers of Serbia
T2  - Hemijska industrija
T1  - Study on the morphology and thermomechanical properties of poly(urethane-siloxane) networks based on hyperbranched polyester
T1  - Proučavanje morfologije i termomehaničkih svojstava umreženih poli(uretan-siloksana) na bazi hiperrazgranatog poliestra
VL  - 67
IS  - 6
SP  - 871
EP  - 879
DO  - 10.2298/HEMIND130225022P
ER  - 

@article{
author = "Pergal, Marija and Džunuzović, Jasna and Špírková, Milena and Poręba, Rafał and Steinhart, Miloš and Pergal, Miodrag M. and Ostojić, Sanja",
year = "2013",
abstract = "Two series of polyurethane films based on hyperbranched polyester of the second pseudo-generation (Boltorn®), 4,4'-methylenediphenyl diisocyanate and two different siloxane prepolymers, α,ω-dihydroxy-(ethylene oxide-poly(dimethylsiloxane)-ethylene oxide)(EO-PDMS-EO) and α,ω-dihydroxypropyl-poly(dimethylsiloxane) (HP-PDMS), were prepared by two-step polymerization in solution. The influence of the type and content of soft segment on the morphology, thermomechanical and surface properties of the synthesized polyurethanes was studied by atomic force microscopy (AFM), small-angle X-ray scattering (SAXS), scanning electron microscopy (SEM), dynamic mechanical thermal analysis (DMTA) and water absorption measurements. It was found that these techniques confirmed existence of microphase separated morphology. Synthesized polyurethanes exhibited two glass transition temperatures and one second relaxation process. The results showed that polyurethanes based on HP-PDMS had higher surface roughness, better microphase separation and waterproof performances. Samples synthesized with lower PDMS content had less hydrophobic surface, but higher crosslinking density and better thermomechanical properties., U ovom radu pripremane su dve serije poliuretanskih filmova na bazi hiperrazgranatog poliestra druge pseudo generacije (Boltron), 4,4¢-metilendifenildiizocijanata i dva različita iloksanska pretpolimera kao što su a, ω-dihidroksi- (etilenoksid-poli(dimetilsiloksan)-etilenoksid)(EO-PDMS-EO) i a,ω-dihidroksipro-pilpoli(dimetilsiloksan)(HP-PDMS), dvostepenom polimerizacijom u rastvoru. Uticaj vrste i sadržaja mekog segmenta na morfologiju, termomehanička i površinska svojstva sintetisanih poliuretana je proučavan pomoću mikroskopije atomske sila (AFM), rasipanja X-zraka pod malim uglovima (SAXS), skenirajuće elektronske mikroskopije (SEM), dinamičko mehaničke termičke analize (DMTA) i merenja količine apsorbovane vode. Nađeno je da primenjene tehnike potvrđuju postojanje morfologije mikrofaznog razdvajanja. Sintetisani poliuretani pokazivali su dve temperature ostakljivanja i jedan sekundarni relaksacioni proces. Rezultati su pokazali da poliuretani na bazi HP-PDMS su imali veći koeficijent hrapavosti, bolje mikrofazno razdvajanje i bolju otpornost prema vodi. Uzorci sintetisani sa nižim sadržajem PDMS-a su imali manju hidrofobnost, ali veću gustinu umrežavanja i bolja termomehanička svojstva.",
publisher = "Association of Chemical Engineers of Serbia",
journal = "Hemijska industrija",
title = "Study on the morphology and thermomechanical properties of poly(urethane-siloxane) networks based on hyperbranched polyester, Proučavanje morfologije i termomehaničkih svojstava umreženih poli(uretan-siloksana) na bazi hiperrazgranatog poliestra",
volume = "67",
number = "6",
pages = "871-879",
doi = "10.2298/HEMIND130225022P"
}

Pergal, M., Džunuzović, J., Špírková, M., Poręba, R., Steinhart, M., Pergal, M. M.,& Ostojić, S.. (2013). Study on the morphology and thermomechanical properties of poly(urethane-siloxane) networks based on hyperbranched polyester. in Hemijska industrija
Association of Chemical Engineers of Serbia., 67(6), 871-879.
https://doi.org/10.2298/HEMIND130225022P

Pergal M, Džunuzović J, Špírková M, Poręba R, Steinhart M, Pergal MM, Ostojić S. Study on the morphology and thermomechanical properties of poly(urethane-siloxane) networks based on hyperbranched polyester. in Hemijska industrija. 2013;67(6):871-879.
doi:10.2298/HEMIND130225022P .

Pergal, Marija, Džunuzović, Jasna, Špírková, Milena, Poręba, Rafał, Steinhart, Miloš, Pergal, Miodrag M., Ostojić, Sanja, "Study on the morphology and thermomechanical properties of poly(urethane-siloxane) networks based on hyperbranched polyester" in Hemijska industrija, 67, no. 6 (2013):871-879,
https://doi.org/10.2298/HEMIND130225022P . .

TY  - CONF
AU  - Pergal, Marija
AU  - Džunuzović, Jasna
AU  - Poręba, Rafał
AU  - Špírková, Milena
PY  - 2012
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6710
AB  - Mechanical and thermal properties, hardness as well as degree of microphase
separation of novel poly(urethane-siloxane) networks based on hyperbranched
polyester of the forth pseudo generation were investigated using a variety of
experimental methods. According to the combined results obtained from DSC and
DMTA experiments, these networks exhibit two glass transition temperatures, of
the soft and hard segments, and one secondary relaxation process. The results
showed increase of crosslinking density and microphase separation and
improvement of mechanical properties with decreasing content of soft ethylene
oxide-poly(dimethylsiloxane)-ethylene oxide segment.
PB  - Society of Physical Chemists of Serbia
C3  - Proceedings - 11th International Conference on Fundamental and Applied Aspects of Physical Chemistry, Physical Chemistry 2012, September 24-28, Belgrade, Serbia
T1  - Poly(urethane-siloxane) networks based on hyperbranched polyester: mechanical and thermal properties
VL  - 2
SP  - 529
EP  - 531
UR  - https://hdl.handle.net/21.15107/rcub_cer_6710
ER  - 

@conference{
author = "Pergal, Marija and Džunuzović, Jasna and Poręba, Rafał and Špírková, Milena",
year = "2012",
abstract = "Mechanical and thermal properties, hardness as well as degree of microphase
separation of novel poly(urethane-siloxane) networks based on hyperbranched
polyester of the forth pseudo generation were investigated using a variety of
experimental methods. According to the combined results obtained from DSC and
DMTA experiments, these networks exhibit two glass transition temperatures, of
the soft and hard segments, and one secondary relaxation process. The results
showed increase of crosslinking density and microphase separation and
improvement of mechanical properties with decreasing content of soft ethylene
oxide-poly(dimethylsiloxane)-ethylene oxide segment.",
publisher = "Society of Physical Chemists of Serbia",
journal = "Proceedings - 11th International Conference on Fundamental and Applied Aspects of Physical Chemistry, Physical Chemistry 2012, September 24-28, Belgrade, Serbia",
title = "Poly(urethane-siloxane) networks based on hyperbranched polyester: mechanical and thermal properties",
volume = "2",
pages = "529-531",
url = "https://hdl.handle.net/21.15107/rcub_cer_6710"
}

Pergal, M., Džunuzović, J., Poręba, R.,& Špírková, M.. (2012). Poly(urethane-siloxane) networks based on hyperbranched polyester: mechanical and thermal properties. in Proceedings - 11th International Conference on Fundamental and Applied Aspects of Physical Chemistry, Physical Chemistry 2012, September 24-28, Belgrade, Serbia
Society of Physical Chemists of Serbia., 2, 529-531.
https://hdl.handle.net/21.15107/rcub_cer_6710

Pergal M, Džunuzović J, Poręba R, Špírková M. Poly(urethane-siloxane) networks based on hyperbranched polyester: mechanical and thermal properties. in Proceedings - 11th International Conference on Fundamental and Applied Aspects of Physical Chemistry, Physical Chemistry 2012, September 24-28, Belgrade, Serbia. 2012;2:529-531.
https://hdl.handle.net/21.15107/rcub_cer_6710 .

Pergal, Marija, Džunuzović, Jasna, Poręba, Rafał, Špírková, Milena, "Poly(urethane-siloxane) networks based on hyperbranched polyester: mechanical and thermal properties" in Proceedings - 11th International Conference on Fundamental and Applied Aspects of Physical Chemistry, Physical Chemistry 2012, September 24-28, Belgrade, Serbia, 2 (2012):529-531,
https://hdl.handle.net/21.15107/rcub_cer_6710 .

TY  - CONF
AU  - Džunuzović, Jasna
AU  - Pergal, Marija
AU  - Poręba, Rafał
AU  - Ostojić, Sanja
AU  - Džunuzović, Enis
AU  - Špírková, Milena
AU  - Jovanović, Slobodan
PY  - 2012
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6784
AB  - U ovom radu ispitana su svojstva poli(uretan-estar-siloksana) na bazi α,ω-dihidroksi-(etilenoksid-poli(dimetilsiloksan)-etilenoksida) (EO-PDMS-EO), 4,4'-diizocijanatodifenilmetana i alifatskog Boltorn® hiperrazgranatog poliestra druge pseudo generacije, kao umreživača. Sintetisano je pet uzoraka umreženih poliuretana sa različitim udelom mekih segmenata (EO-PDMS-EO) primenom dvostepene reakcije polimerizacije u rastvoru. Uticaj udela EO-PDMS-EO na mehanička i termička svojstva umreženih poli(uretan-estar-siloksana) ispitan je dinamičko-mehaničkom analizom (DMA), diferencijalnom skenirajućom kalorimetrijom (DSC) i merenjem tvrdoće. Dobijeni rezultati ukazuju da smanjenje udela EO-PDMS-EO utiče na povećanje stepena mikrofazne separacije sintetisanih uzoraka. Istovremeno dolazi do povećanja gustine umrežavanja, heterogenosti mreže i poboljšanja mehaničkih svojstava umreženih poli(uretan-estar-siloksana). Korišćenjem DMA određene su vrednosti temperature ostakljivanja mekih i tvrdih segmenata, kao i temperature koje odgovaraju sekundarnom relaksacionom procesu. Rezultati prikazani u ovom radu ukazuju da se kombinacijom makrodiola na bazi poli(dimetilsiloksana), hiperrazgranatog poliola i odgovarajućeg diizocijanata mogu sintetisati umreženi poliuretanski materijali odgovarajućih termičkih i mehaničkih svojstava za tačno određenu namenu.
AB  - Properties of poly(urethane-ester-siloxane)s based on α,ω-dihydroxy-(ethylene oxide-poly(dimethylsiloxane)-ethylene oxide) (EO-PDMS-EO), 4,4'-methylenediphenyl diisocyanate and aliphatic Boltorn® hyperbranched polyester of the second pseudo generation as crosslinking agent were investigated in this work. Five samples of polyurethane networks having different soft segment (EO-PDMS-EO) content were synthesized using two-step polymerization reaction in solution. The effect of EO-PDMS-EO content on the mechanical and thermal properties of poly(urethane-ester-siloxane) networks was investigated using dynamic mechanical analysis 
(DMA), differential scanning calorimetry (DSC) and hardness measurements. Obtained results revealed that decrease of EO-PDMS-EO content enhanced microphase separation in the synthesized networks. Simultaneously, increase of the hard segment content improved mechanical properties and induced increase of the crosslinking density and network heterogeneity of poly(urethane-ester-siloxane)s. DMA results revealed existence of two glass transition temperatures, of the soft and hard segments and the presence of secondary relaxation process. Results presented in this work indicate that this specific combination of poly(dimethylsiloxane)-based macrodiol, hyperbranched polyol and adequate diisocyanate can be applied to obtain polyurethane networks of good thermal and mechanical properties, which can be relatively easily 
tailored for exact application requirements by changing soft/hard segment ratio.
PB  - Belgrade : Serbian Chemical Society
C3  - Proceedings - 50th Meeting of the Serbian Chemical Society, Golden Jubilee Meeting of  the Serbian Chemical Society, June 14-15, 2012, Belgrade, Serbia //  Knjiga radova - 50. jubilarno savetovanje Srpskog hemijskog društva, 14-15. Juni 2012, Beograd
T1  - Mehanička i termička svojstva umreženih poli(uretan-estar-siloksana)
T1  - Mechanical and Thermal Properties of Poly(urethane-ester-siloxane) Networks
SP  - 218
EP  - 221
UR  - https://hdl.handle.net/21.15107/rcub_cer_6784
ER  - 

@conference{
author = "Džunuzović, Jasna and Pergal, Marija and Poręba, Rafał and Ostojić, Sanja and Džunuzović, Enis and Špírková, Milena and Jovanović, Slobodan",
year = "2012",
abstract = "U ovom radu ispitana su svojstva poli(uretan-estar-siloksana) na bazi α,ω-dihidroksi-(etilenoksid-poli(dimetilsiloksan)-etilenoksida) (EO-PDMS-EO), 4,4'-diizocijanatodifenilmetana i alifatskog Boltorn® hiperrazgranatog poliestra druge pseudo generacije, kao umreživača. Sintetisano je pet uzoraka umreženih poliuretana sa različitim udelom mekih segmenata (EO-PDMS-EO) primenom dvostepene reakcije polimerizacije u rastvoru. Uticaj udela EO-PDMS-EO na mehanička i termička svojstva umreženih poli(uretan-estar-siloksana) ispitan je dinamičko-mehaničkom analizom (DMA), diferencijalnom skenirajućom kalorimetrijom (DSC) i merenjem tvrdoće. Dobijeni rezultati ukazuju da smanjenje udela EO-PDMS-EO utiče na povećanje stepena mikrofazne separacije sintetisanih uzoraka. Istovremeno dolazi do povećanja gustine umrežavanja, heterogenosti mreže i poboljšanja mehaničkih svojstava umreženih poli(uretan-estar-siloksana). Korišćenjem DMA određene su vrednosti temperature ostakljivanja mekih i tvrdih segmenata, kao i temperature koje odgovaraju sekundarnom relaksacionom procesu. Rezultati prikazani u ovom radu ukazuju da se kombinacijom makrodiola na bazi poli(dimetilsiloksana), hiperrazgranatog poliola i odgovarajućeg diizocijanata mogu sintetisati umreženi poliuretanski materijali odgovarajućih termičkih i mehaničkih svojstava za tačno određenu namenu., Properties of poly(urethane-ester-siloxane)s based on α,ω-dihydroxy-(ethylene oxide-poly(dimethylsiloxane)-ethylene oxide) (EO-PDMS-EO), 4,4'-methylenediphenyl diisocyanate and aliphatic Boltorn® hyperbranched polyester of the second pseudo generation as crosslinking agent were investigated in this work. Five samples of polyurethane networks having different soft segment (EO-PDMS-EO) content were synthesized using two-step polymerization reaction in solution. The effect of EO-PDMS-EO content on the mechanical and thermal properties of poly(urethane-ester-siloxane) networks was investigated using dynamic mechanical analysis 
(DMA), differential scanning calorimetry (DSC) and hardness measurements. Obtained results revealed that decrease of EO-PDMS-EO content enhanced microphase separation in the synthesized networks. Simultaneously, increase of the hard segment content improved mechanical properties and induced increase of the crosslinking density and network heterogeneity of poly(urethane-ester-siloxane)s. DMA results revealed existence of two glass transition temperatures, of the soft and hard segments and the presence of secondary relaxation process. Results presented in this work indicate that this specific combination of poly(dimethylsiloxane)-based macrodiol, hyperbranched polyol and adequate diisocyanate can be applied to obtain polyurethane networks of good thermal and mechanical properties, which can be relatively easily 
tailored for exact application requirements by changing soft/hard segment ratio.",
publisher = "Belgrade : Serbian Chemical Society",
journal = "Proceedings - 50th Meeting of the Serbian Chemical Society, Golden Jubilee Meeting of  the Serbian Chemical Society, June 14-15, 2012, Belgrade, Serbia //  Knjiga radova - 50. jubilarno savetovanje Srpskog hemijskog društva, 14-15. Juni 2012, Beograd",
title = "Mehanička i termička svojstva umreženih poli(uretan-estar-siloksana), Mechanical and Thermal Properties of Poly(urethane-ester-siloxane) Networks",
pages = "218-221",
url = "https://hdl.handle.net/21.15107/rcub_cer_6784"
}

Džunuzović, J., Pergal, M., Poręba, R., Ostojić, S., Džunuzović, E., Špírková, M.,& Jovanović, S.. (2012). Mehanička i termička svojstva umreženih poli(uretan-estar-siloksana). in Proceedings - 50th Meeting of the Serbian Chemical Society, Golden Jubilee Meeting of  the Serbian Chemical Society, June 14-15, 2012, Belgrade, Serbia //  Knjiga radova - 50. jubilarno savetovanje Srpskog hemijskog društva, 14-15. Juni 2012, Beograd
Belgrade : Serbian Chemical Society., 218-221.
https://hdl.handle.net/21.15107/rcub_cer_6784

Džunuzović J, Pergal M, Poręba R, Ostojić S, Džunuzović E, Špírková M, Jovanović S. Mehanička i termička svojstva umreženih poli(uretan-estar-siloksana). in Proceedings - 50th Meeting of the Serbian Chemical Society, Golden Jubilee Meeting of  the Serbian Chemical Society, June 14-15, 2012, Belgrade, Serbia //  Knjiga radova - 50. jubilarno savetovanje Srpskog hemijskog društva, 14-15. Juni 2012, Beograd. 2012;:218-221.
https://hdl.handle.net/21.15107/rcub_cer_6784 .

Džunuzović, Jasna, Pergal, Marija, Poręba, Rafał, Ostojić, Sanja, Džunuzović, Enis, Špírková, Milena, Jovanović, Slobodan, "Mehanička i termička svojstva umreženih poli(uretan-estar-siloksana)" in Proceedings - 50th Meeting of the Serbian Chemical Society, Golden Jubilee Meeting of  the Serbian Chemical Society, June 14-15, 2012, Belgrade, Serbia //  Knjiga radova - 50. jubilarno savetovanje Srpskog hemijskog društva, 14-15. Juni 2012, Beograd (2012):218-221,
https://hdl.handle.net/21.15107/rcub_cer_6784 .

TY  - JOUR
AU  - Džunuzović, Jasna
AU  - Pergal, Marija
AU  - Vodnik, Vesna
AU  - Špírková, Milena
AU  - Poręba, Rafał
AU  - Jovanović, Slobodan
PY  - 2012
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1046
AB  - Two series of crosslinked poly(urethane-ester-siloxane)s were synthesized from α,ω-dihydroxy-(ethylene oxide-poly(dimethylsiloxane)-ethylene oxide) (EO-PDMS- -EO), 4,4'-methylenediphenyl diisocyanate and Boltorn® hyperbranched polyesters of the second and third pseudo generation, by two-step polymerization in solution. The effect of the EO-PDMS-EO content and functionality of the applied crosslinking agent on the morphology and surface properties of the prepared poly(urethane-ester-siloxane)s was investigated by FTIR spectroscopy, small-angle X-ray scattering (SAXS), atomic force microscopy (AFM), scanning electron microscopy (SEM) and water absorption measurement. Different techniques (FTIR peak deconvolution, SAXS and AFM) revealed that decrease of the crosslinking agent functionality and EO-PDMS-EO content promotes microphase separation in the synthesized poly(urethane-ester-siloxane)s. SEM analysis and water absorption experiments showed that, due to the hydrophobic character of EO-PDMS-EO and its ability to migrate to the surface of poly(urethane-ester-siloxane)s, samples synthesized with higher EO-PDMS-EO content and crosslinking agents of lower functionality had more hydrophobic surfaces and better waterproof performances. The obtained results indicate that the synthesis of poly(urethane-ester-siloxane)s based on EO-PDMS-EO and Boltorn® hyperbranched polyesters leads to the creation of networks with interesting morphological and surface properties, which can be easily tailored by changing the content of EO-PDMS-EO segment or functionality of hyperbranched polyester.
AB  - U ovom radu sintetisane su dve serije umreženih poli(uretan-estar-siloksana) (PUS) korišćenjem α,ω-dihidroksi-(etilenoksid-poli(dimetilsiloksan)-etilenoksida) (EO-PDMS-EO), 4,4'-diizocijanatodifenilmetana i dva Boltorn® hiperrazgranata poliestra (HRP) druge i treće pseudo generacije kao umreživača. Svaka serija se sastoji od uzoraka koji imaju različiti udeo mekog segmenta (EO-PDMS-EO). Uticaj funkcionalnosti korišćenog HRP i udela mekog segmenta na morfologiju i površinska svojstva PUS ispitan je primenom FTIR spektroskopije, SAXS, AFM i SEM analize i merenjem količine apsorbovane vode. Pokazano je da sa smanjenjem funkcionalnosti umreživača i udela EO-PDMS-EO dolazi do povećanja stepena mikrofaznog razdvajanja kod sintetisanih PUS. Pored toga, uzorci PUS sa većim udelom mekog segmenta i sintetisani primenom HRP niže funkcionalnosti pokazuju bolju otpornost na vodu.
PB  - Association of Chemical Engineers of Serbia
T2  - Hemijska industrija
T1  - Investigation of the morphology and surface properties of crosslinked poly(urethane-ester-siloxane)s
T1  - Ispitivanje morfologije i površinskih svojstava umreženih poli(uretan-estar-siloksana)
VL  - 66
IS  - 6
SP  - 813
EP  - 821
DO  - 10.2298/HEMIND121004101D
ER  - 

@article{
author = "Džunuzović, Jasna and Pergal, Marija and Vodnik, Vesna and Špírková, Milena and Poręba, Rafał and Jovanović, Slobodan",
year = "2012",
abstract = "Two series of crosslinked poly(urethane-ester-siloxane)s were synthesized from α,ω-dihydroxy-(ethylene oxide-poly(dimethylsiloxane)-ethylene oxide) (EO-PDMS- -EO), 4,4'-methylenediphenyl diisocyanate and Boltorn® hyperbranched polyesters of the second and third pseudo generation, by two-step polymerization in solution. The effect of the EO-PDMS-EO content and functionality of the applied crosslinking agent on the morphology and surface properties of the prepared poly(urethane-ester-siloxane)s was investigated by FTIR spectroscopy, small-angle X-ray scattering (SAXS), atomic force microscopy (AFM), scanning electron microscopy (SEM) and water absorption measurement. Different techniques (FTIR peak deconvolution, SAXS and AFM) revealed that decrease of the crosslinking agent functionality and EO-PDMS-EO content promotes microphase separation in the synthesized poly(urethane-ester-siloxane)s. SEM analysis and water absorption experiments showed that, due to the hydrophobic character of EO-PDMS-EO and its ability to migrate to the surface of poly(urethane-ester-siloxane)s, samples synthesized with higher EO-PDMS-EO content and crosslinking agents of lower functionality had more hydrophobic surfaces and better waterproof performances. The obtained results indicate that the synthesis of poly(urethane-ester-siloxane)s based on EO-PDMS-EO and Boltorn® hyperbranched polyesters leads to the creation of networks with interesting morphological and surface properties, which can be easily tailored by changing the content of EO-PDMS-EO segment or functionality of hyperbranched polyester., U ovom radu sintetisane su dve serije umreženih poli(uretan-estar-siloksana) (PUS) korišćenjem α,ω-dihidroksi-(etilenoksid-poli(dimetilsiloksan)-etilenoksida) (EO-PDMS-EO), 4,4'-diizocijanatodifenilmetana i dva Boltorn® hiperrazgranata poliestra (HRP) druge i treće pseudo generacije kao umreživača. Svaka serija se sastoji od uzoraka koji imaju različiti udeo mekog segmenta (EO-PDMS-EO). Uticaj funkcionalnosti korišćenog HRP i udela mekog segmenta na morfologiju i površinska svojstva PUS ispitan je primenom FTIR spektroskopije, SAXS, AFM i SEM analize i merenjem količine apsorbovane vode. Pokazano je da sa smanjenjem funkcionalnosti umreživača i udela EO-PDMS-EO dolazi do povećanja stepena mikrofaznog razdvajanja kod sintetisanih PUS. Pored toga, uzorci PUS sa većim udelom mekog segmenta i sintetisani primenom HRP niže funkcionalnosti pokazuju bolju otpornost na vodu.",
publisher = "Association of Chemical Engineers of Serbia",
journal = "Hemijska industrija",
title = "Investigation of the morphology and surface properties of crosslinked poly(urethane-ester-siloxane)s, Ispitivanje morfologije i površinskih svojstava umreženih poli(uretan-estar-siloksana)",
volume = "66",
number = "6",
pages = "813-821",
doi = "10.2298/HEMIND121004101D"
}

Džunuzović, J., Pergal, M., Vodnik, V., Špírková, M., Poręba, R.,& Jovanović, S.. (2012). Investigation of the morphology and surface properties of crosslinked poly(urethane-ester-siloxane)s. in Hemijska industrija
Association of Chemical Engineers of Serbia., 66(6), 813-821.
https://doi.org/10.2298/HEMIND121004101D

Džunuzović J, Pergal M, Vodnik V, Špírková M, Poręba R, Jovanović S. Investigation of the morphology and surface properties of crosslinked poly(urethane-ester-siloxane)s. in Hemijska industrija. 2012;66(6):813-821.
doi:10.2298/HEMIND121004101D .

Džunuzović, Jasna, Pergal, Marija, Vodnik, Vesna, Špírková, Milena, Poręba, Rafał, Jovanović, Slobodan, "Investigation of the morphology and surface properties of crosslinked poly(urethane-ester-siloxane)s" in Hemijska industrija, 66, no. 6 (2012):813-821,
https://doi.org/10.2298/HEMIND121004101D . .