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  - Ostojić, Sanja
AU  - Steinhart, Miloš
AU  - Stefanović, Ivan
AU  - Pezo, Lato
AU  - Spírková, Milena
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5615
AB  - Thermoplastic poly(urethane-siloxane)/organoclay nanocomposites (TPU NCs) with different hard segment content (20–55 wt. %) were prepared by in situ polymerization in the presence of organically modified montmorillonite as a nanofiller (Cloisite 30B; 1 wt. %). Hydroxyl-terminated ethoxypropyl- poly(dimethylsiloxane) was used as soft segment, while 4,4'-methylenediphenyl diisocyanate and 1,4-butanediol were the hard segment components. The study of the influence of the hard segment content on the functional properties of TPU NCs was performed by Fourier transform infrared (FTIR) spectroscopy, X-ray diffractometry (XRD), atomic force microscopy (AFM), scanning electron microscopy (SEM), dynamic mechanical thermal analyses (DMTA), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), water contact angle and water absorption tests. The results revealed that TPU NCs with the increasing hard segment content exhibit higher values of degree of microphase separation, melting temperature of the hard segments, degree of crystallinity, storage modulus (except for TPU NC-55), but lower thermal stability and hydrophobicity. TPU NC films were hydrophobic and their free surface energy was in the range from 17.7 to 24.9 mJ m-2. This work highlights how the composition of TPU NCs would affect their functional properties and provide an additional composition intended for designing advanced TPU NC materials for special biomedical applications.
AB  - Термопластични поли(уретан-силоксан)/органоглина нанокомпозити (TPU NCs) са различитим садржајем тврдих сегмената (20–55 теж. %) припремљени су in situ полимеризацијом у присуству органски модификованог монтморилонита као нанопуниoца (Cloisite 30B; 1 теж. %). Као меки сегмент коришћен је хидроксиетоксипропил терминирани поли(диметилсилоксан), а као компоненте тврдог сегмента коршћени су 4,4'-  -метилендифенилдиизоцијанат и 1,4-бутандиол. Проучавање утицаја садржаја тврдог сегмента на функционална својства TPU NCs је испитивано FTIR спектроскопијом, дифракцијом X-зрака (XRD), микроскопијом атомских сила (AFM), скенирајућом електронском микроскопијом (SEM), динамичко механичко термичком анализом (DMTA), диференцијално скенирајућом калориметријом (DSC), термогравиметријском анализом (TGA), тестовима одређивања контактног угла са водом и апсорпције воде. Резултати су показали да TPU NCs са већим садржајем тврдих сегмената показују веће вредности степена микрофазне сепарације, температуре топљења тврдих сегмената, степена кристалиничности, модула сачуване енергије (осим за TPU NC-55), али нижу термичку стабилност и хидрофобност. TPU NC филмови су били хидрофобни и њихова површинска енергија је била у опсегу од 17,7 до 24,9 mJ m-2. Овај рад истиче како би се променом састава у TPU NCs подешавала функционална својства и обезбедило додатно подешавање састава за дизајнирање напредних TPU NC материјала за специјалне биомедицинске примене.
PB  - Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - Nanocomposites made from thermoplastic linear poly(urethane-siloxane) and organoclay: Composition impact on the properties
T1  - Нанокомпозити на бази термопластичног линеарног поли(уретан-силоксан)а и органоглине: утицај састава на својства
VL  - 87
IS  - 10
SP  - 1203
EP  - 1218
DO  - 10.2298/JSC220223036P
ER  - 

@article{
author = "Pergal, Marija and Ostojić, Sanja and Steinhart, Miloš and Stefanović, Ivan and Pezo, Lato and Spírková, Milena",
year = "2022",
abstract = "Thermoplastic poly(urethane-siloxane)/organoclay nanocomposites (TPU NCs) with different hard segment content (20–55 wt. %) were prepared by in situ polymerization in the presence of organically modified montmorillonite as a nanofiller (Cloisite 30B; 1 wt. %). Hydroxyl-terminated ethoxypropyl- poly(dimethylsiloxane) was used as soft segment, while 4,4'-methylenediphenyl diisocyanate and 1,4-butanediol were the hard segment components. The study of the influence of the hard segment content on the functional properties of TPU NCs was performed by Fourier transform infrared (FTIR) spectroscopy, X-ray diffractometry (XRD), atomic force microscopy (AFM), scanning electron microscopy (SEM), dynamic mechanical thermal analyses (DMTA), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), water contact angle and water absorption tests. The results revealed that TPU NCs with the increasing hard segment content exhibit higher values of degree of microphase separation, melting temperature of the hard segments, degree of crystallinity, storage modulus (except for TPU NC-55), but lower thermal stability and hydrophobicity. TPU NC films were hydrophobic and their free surface energy was in the range from 17.7 to 24.9 mJ m-2. This work highlights how the composition of TPU NCs would affect their functional properties and provide an additional composition intended for designing advanced TPU NC materials for special biomedical applications., Термопластични поли(уретан-силоксан)/органоглина нанокомпозити (TPU NCs) са различитим садржајем тврдих сегмената (20–55 теж. %) припремљени су in situ полимеризацијом у присуству органски модификованог монтморилонита као нанопуниoца (Cloisite 30B; 1 теж. %). Као меки сегмент коришћен је хидроксиетоксипропил терминирани поли(диметилсилоксан), а као компоненте тврдог сегмента коршћени су 4,4'-  -метилендифенилдиизоцијанат и 1,4-бутандиол. Проучавање утицаја садржаја тврдог сегмента на функционална својства TPU NCs је испитивано FTIR спектроскопијом, дифракцијом X-зрака (XRD), микроскопијом атомских сила (AFM), скенирајућом електронском микроскопијом (SEM), динамичко механичко термичком анализом (DMTA), диференцијално скенирајућом калориметријом (DSC), термогравиметријском анализом (TGA), тестовима одређивања контактног угла са водом и апсорпције воде. Резултати су показали да TPU NCs са већим садржајем тврдих сегмената показују веће вредности степена микрофазне сепарације, температуре топљења тврдих сегмената, степена кристалиничности, модула сачуване енергије (осим за TPU NC-55), али нижу термичку стабилност и хидрофобност. TPU NC филмови су били хидрофобни и њихова површинска енергија је била у опсегу од 17,7 до 24,9 mJ m-2. Овај рад истиче како би се променом састава у TPU NCs подешавала функционална својства и обезбедило додатно подешавање састава за дизајнирање напредних TPU NC материјала за специјалне биомедицинске примене.",
publisher = "Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Nanocomposites made from thermoplastic linear poly(urethane-siloxane) and organoclay: Composition impact on the properties, Нанокомпозити на бази термопластичног линеарног поли(уретан-силоксан)а и органоглине: утицај састава на својства",
volume = "87",
number = "10",
pages = "1203-1218",
doi = "10.2298/JSC220223036P"
}

Pergal, M., Ostojić, S., Steinhart, M., Stefanović, I., Pezo, L.,& Spírková, M.. (2022). Nanocomposites made from thermoplastic linear poly(urethane-siloxane) and organoclay: Composition impact on the properties. in Journal of the Serbian Chemical Society
Serbian Chemical Society., 87(10), 1203-1218.
https://doi.org/10.2298/JSC220223036P

Pergal M, Ostojić S, Steinhart M, Stefanović I, Pezo L, Spírková M. Nanocomposites made from thermoplastic linear poly(urethane-siloxane) and organoclay: Composition impact on the properties. in Journal of the Serbian Chemical Society. 2022;87(10):1203-1218.
doi:10.2298/JSC220223036P .

Pergal, Marija, Ostojić, Sanja, Steinhart, Miloš, Stefanović, Ivan, Pezo, Lato, Spírková, Milena, "Nanocomposites made from thermoplastic linear poly(urethane-siloxane) and organoclay: Composition impact on the properties" in Journal of the Serbian Chemical Society, 87, no. 10 (2022):1203-1218,
https://doi.org/10.2298/JSC220223036P . .

TY  - CONF
AU  - Stefanović, Ivan
AU  - Špirkova, Milena
AU  - Poreba, Rafal
AU  - Steinhart, Miloš
AU  - Ostojić, Sanja
AU  - Tešević, Vele
AU  - Pergal, Marija
PY  - 2014
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6489
AB  - In this paper was investigated the influence of the content of soft poly(propylene oxide)-b-poly(dimethylsiloxane)-b-polY(propylene oxide) (PPO-PDMS) segments on the thermal and morphological properties of new thermoplastic polyurethane with TGA, DSC and AFM analyses as well as deconvolution of FTIR spectra. The thermal stability of the copolymers increased, while the degree of crystallinity decreased with increasing content of PPO-PDMS segments. AFM and FTIR analysis confirmed that with decreasing of the content of PPO-PDMS segments the degree of microphase separation in copolymers increased.
AB  - U ovom radu ispitan je uticaj sadržaja mekih poli(propilenoksida)-b-poli(dimetilsiloksana)-b-poli(propilenoksida) (PPO-PDMS) segmenta na termička i morfološka svojstva novih termoplastičnih poliuretana pomoću TGA, DSC i AFM analiza kao i dekonvolucijom FTIR spektara. Termička stabilnost kopolimera se povećavala, dok se stepen kristaliničnosti smanjivao sa povećanjem sadržaja PPO-PDMS segmenata. AFM i FTIR analize su potvrdile da se sa smanjivanjem sadržaja PPO-PDMS segmenata povećavao stepen mikrofaznog razdvajanja kopolimera.
PB  - Belgrade : Serbian Chemical Society
C3  - Program i kratki izvodi radova - 51. Savetovanje Srpskog hemijskog društva i 2. Konferencija mladih hemičara Srbije, 05-07. juna 2014, Niš / Program and Book of abstracts - 51st Meeting of the Serbian Chemical Society and 2nd Conference of Young Chemists of Serbia, 05-07. June 2014, Niš
T1  - Thermal and morphological properties of thermoplastic polyurethane-based on poly(propylene oxide)-b-poly(dimethylsiloxane)-b-poly(propylene oxide)
T1  - Termička i morfološka svojstva termoplastičnih poliuretana na bazi poli(propilenoksida)-b-poli(dimetilsiloksana)-b-poli(propilenoksida)
SP  - 80
EP  - 80
UR  - https://hdl.handle.net/21.15107/rcub_cer_6489
ER  - 

@conference{
author = "Stefanović, Ivan and Špirkova, Milena and Poreba, Rafal and Steinhart, Miloš and Ostojić, Sanja and Tešević, Vele and Pergal, Marija",
year = "2014",
abstract = "In this paper was investigated the influence of the content of soft poly(propylene oxide)-b-poly(dimethylsiloxane)-b-polY(propylene oxide) (PPO-PDMS) segments on the thermal and morphological properties of new thermoplastic polyurethane with TGA, DSC and AFM analyses as well as deconvolution of FTIR spectra. The thermal stability of the copolymers increased, while the degree of crystallinity decreased with increasing content of PPO-PDMS segments. AFM and FTIR analysis confirmed that with decreasing of the content of PPO-PDMS segments the degree of microphase separation in copolymers increased., U ovom radu ispitan je uticaj sadržaja mekih poli(propilenoksida)-b-poli(dimetilsiloksana)-b-poli(propilenoksida) (PPO-PDMS) segmenta na termička i morfološka svojstva novih termoplastičnih poliuretana pomoću TGA, DSC i AFM analiza kao i dekonvolucijom FTIR spektara. Termička stabilnost kopolimera se povećavala, dok se stepen kristaliničnosti smanjivao sa povećanjem sadržaja PPO-PDMS segmenata. AFM i FTIR analize su potvrdile da se sa smanjivanjem sadržaja PPO-PDMS segmenata povećavao stepen mikrofaznog razdvajanja kopolimera.",
publisher = "Belgrade : Serbian Chemical Society",
journal = "Program i kratki izvodi radova - 51. Savetovanje Srpskog hemijskog društva i 2. Konferencija mladih hemičara Srbije, 05-07. juna 2014, Niš / Program and Book of abstracts - 51st Meeting of the Serbian Chemical Society and 2nd Conference of Young Chemists of Serbia, 05-07. June 2014, Niš",
title = "Thermal and morphological properties of thermoplastic polyurethane-based on poly(propylene oxide)-b-poly(dimethylsiloxane)-b-poly(propylene oxide), Termička i morfološka svojstva termoplastičnih poliuretana na bazi poli(propilenoksida)-b-poli(dimetilsiloksana)-b-poli(propilenoksida)",
pages = "80-80",
url = "https://hdl.handle.net/21.15107/rcub_cer_6489"
}

Stefanović, I., Špirkova, M., Poreba, R., Steinhart, M., Ostojić, S., Tešević, V.,& Pergal, M.. (2014). Thermal and morphological properties of thermoplastic polyurethane-based on poly(propylene oxide)-b-poly(dimethylsiloxane)-b-poly(propylene oxide). in Program i kratki izvodi radova - 51. Savetovanje Srpskog hemijskog društva i 2. Konferencija mladih hemičara Srbije, 05-07. juna 2014, Niš / Program and Book of abstracts - 51st Meeting of the Serbian Chemical Society and 2nd Conference of Young Chemists of Serbia, 05-07. June 2014, Niš
Belgrade : Serbian Chemical Society., 80-80.
https://hdl.handle.net/21.15107/rcub_cer_6489

Stefanović I, Špirkova M, Poreba R, Steinhart M, Ostojić S, Tešević V, Pergal M. Thermal and morphological properties of thermoplastic polyurethane-based on poly(propylene oxide)-b-poly(dimethylsiloxane)-b-poly(propylene oxide). in Program i kratki izvodi radova - 51. Savetovanje Srpskog hemijskog društva i 2. Konferencija mladih hemičara Srbije, 05-07. juna 2014, Niš / Program and Book of abstracts - 51st Meeting of the Serbian Chemical Society and 2nd Conference of Young Chemists of Serbia, 05-07. June 2014, Niš. 2014;:80-80.
https://hdl.handle.net/21.15107/rcub_cer_6489 .

Stefanović, Ivan, Špirkova, Milena, Poreba, Rafal, Steinhart, Miloš, Ostojić, Sanja, Tešević, Vele, Pergal, Marija, "Thermal and morphological properties of thermoplastic polyurethane-based on poly(propylene oxide)-b-poly(dimethylsiloxane)-b-poly(propylene oxide)" in Program i kratki izvodi radova - 51. Savetovanje Srpskog hemijskog društva i 2. Konferencija mladih hemičara Srbije, 05-07. juna 2014, Niš / Program and Book of abstracts - 51st Meeting of the Serbian Chemical Society and 2nd Conference of Young Chemists of Serbia, 05-07. June 2014, Niš (2014):80-80,
https://hdl.handle.net/21.15107/rcub_cer_6489 .

TY  - CONF
AU  - Stefanović, Ivan
AU  - Špirkova, Milena
AU  - Poreba, Rafal
AU  - Steinhart, Miloš
AU  - Micić, Darko
AU  - Tešević, Vele
AU  - Pergal, Marija
PY  - 2014
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6553
AB  - A series of novel thermoplastic polyurethanes (TPUs) nanocomposites
based on α,ω–dihydroxy ethoxy propyl poly(dimethylsiloxane) (EOPDMS),
1,4-butanediol (BD) and 4,4'-diphenylmethane diisocyanate (MDI)
was synthesized by in situ two-step polyaddition reaction in solution using
modified clay (Cloisite 30B). The clay percentage in the nanocomposites
was 1, 3, 5, 8 and 10 wt% in relation to the polymers. The aim of this study
was to improve some properties of TPUs by the addition of clay
nanoparticles. The prepared nanocomposites were characterized using FTIR,
AFM and DSC analyses. The influence of nanoparticles dispersion on the
morphology and thermal properties of TPUs was investigated.
PB  - Belgrade : Society of Physical Chemists of Serbia
C3  - Proceedings - 12th International Conference on Fundamental and Applied Aspects of Physical Chemistry „Physical Chemistry 2014“, September 22-26 2014, Belgrade
T1  - Novel siloxane based polyurethane nanocomposites
VL  - II
SP  - 807
EP  - 810
UR  - https://hdl.handle.net/21.15107/rcub_cer_6553
ER  - 

@conference{
author = "Stefanović, Ivan and Špirkova, Milena and Poreba, Rafal and Steinhart, Miloš and Micić, Darko and Tešević, Vele and Pergal, Marija",
year = "2014",
abstract = "A series of novel thermoplastic polyurethanes (TPUs) nanocomposites
based on α,ω–dihydroxy ethoxy propyl poly(dimethylsiloxane) (EOPDMS),
1,4-butanediol (BD) and 4,4'-diphenylmethane diisocyanate (MDI)
was synthesized by in situ two-step polyaddition reaction in solution using
modified clay (Cloisite 30B). The clay percentage in the nanocomposites
was 1, 3, 5, 8 and 10 wt% in relation to the polymers. The aim of this study
was to improve some properties of TPUs by the addition of clay
nanoparticles. The prepared nanocomposites were characterized using FTIR,
AFM and DSC analyses. The influence of nanoparticles dispersion on the
morphology and thermal properties of TPUs was investigated.",
publisher = "Belgrade : Society of Physical Chemists of Serbia",
journal = "Proceedings - 12th International Conference on Fundamental and Applied Aspects of Physical Chemistry „Physical Chemistry 2014“, September 22-26 2014, Belgrade",
title = "Novel siloxane based polyurethane nanocomposites",
volume = "II",
pages = "807-810",
url = "https://hdl.handle.net/21.15107/rcub_cer_6553"
}

Stefanović, I., Špirkova, M., Poreba, R., Steinhart, M., Micić, D., Tešević, V.,& Pergal, M.. (2014). Novel siloxane based polyurethane nanocomposites. in Proceedings - 12th International Conference on Fundamental and Applied Aspects of Physical Chemistry „Physical Chemistry 2014“, September 22-26 2014, Belgrade
Belgrade : Society of Physical Chemists of Serbia., II, 807-810.
https://hdl.handle.net/21.15107/rcub_cer_6553

Stefanović I, Špirkova M, Poreba R, Steinhart M, Micić D, Tešević V, Pergal M. Novel siloxane based polyurethane nanocomposites. in Proceedings - 12th International Conference on Fundamental and Applied Aspects of Physical Chemistry „Physical Chemistry 2014“, September 22-26 2014, Belgrade. 2014;II:807-810.
https://hdl.handle.net/21.15107/rcub_cer_6553 .

Stefanović, Ivan, Špirkova, Milena, Poreba, Rafal, Steinhart, Miloš, Micić, Darko, Tešević, Vele, Pergal, Marija, "Novel siloxane based polyurethane nanocomposites" in Proceedings - 12th International Conference on Fundamental and Applied Aspects of Physical Chemistry „Physical Chemistry 2014“, September 22-26 2014, Belgrade, II (2014):807-810,
https://hdl.handle.net/21.15107/rcub_cer_6553 .

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 . .