TY  - JOUR
AU  - Pergal, Marija
AU  - Stefanović, Ivan
AU  - Poreba, Rafal
AU  - Steinhart, Milos
AU  - Jovancic, Petar
AU  - Ostojić, Sanja
AU  - Spirkova, Milena
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2260
AB  - Novel poly(dimethylsiloxane)-based polyurethane nanocomposites (TPU-NCs) were synthesized using in situ polymerization with the nanoclay Cloisite 30B. Differential scanning calorimetry, thermogravimetric analysis, and dynamic mechanical thermal analysis showed that TPU-NCs with an organoclay content of  LT = 5 wt % exhibited increased thermal stability, storage modulus, and hard-segment melt temperatures but decreased degrees of crystallinity. TPU-NCs displayed increased surface hydrophilicity and enhanced surface free energy with increasing organoclay content. Small and wide-angle X-ray scattering confirmed intercalated formations of organoclays in the nanocomposites. Individual clay particles on the surfaces of TPUs with lower organoclay loadings (1 or 3 wt %) or organoclay agglomerates in TPUs with higher amounts of organoclay (>= 5 wt %) were detectable using scanning electron microscopy. The relatively smooth and homogeneous character of pure TPU and the distinctly heterogeneous and rough surfaces of TPU-NCs were detected via atomic force microscopy. Among the nanomaterials prepared, TPU-NCs with 1 wt % organoclay provided the best balance between the organoclay concentration and the functional properties desired in biomedical applications.
PB  - American Chemical Society (ACS)
T2  - Industrial and Engineering Chemistry Research
T1  - Influence of the Organoclay Content on the Structure, Morphology, and Surface Related Properties of Novel Poly(dimethylsiloxane)-Based Polyurethane/Organoclay Nanocomposites
VL  - 56
IS  - 17
SP  - 4970
EP  - 4983
DO  - 10.1021/acs.iecr.6b04913
ER  - 

@article{
author = "Pergal, Marija and Stefanović, Ivan and Poreba, Rafal and Steinhart, Milos and Jovancic, Petar and Ostojić, Sanja and Spirkova, Milena",
year = "2017",
abstract = "Novel poly(dimethylsiloxane)-based polyurethane nanocomposites (TPU-NCs) were synthesized using in situ polymerization with the nanoclay Cloisite 30B. Differential scanning calorimetry, thermogravimetric analysis, and dynamic mechanical thermal analysis showed that TPU-NCs with an organoclay content of  LT = 5 wt % exhibited increased thermal stability, storage modulus, and hard-segment melt temperatures but decreased degrees of crystallinity. TPU-NCs displayed increased surface hydrophilicity and enhanced surface free energy with increasing organoclay content. Small and wide-angle X-ray scattering confirmed intercalated formations of organoclays in the nanocomposites. Individual clay particles on the surfaces of TPUs with lower organoclay loadings (1 or 3 wt %) or organoclay agglomerates in TPUs with higher amounts of organoclay (>= 5 wt %) were detectable using scanning electron microscopy. The relatively smooth and homogeneous character of pure TPU and the distinctly heterogeneous and rough surfaces of TPU-NCs were detected via atomic force microscopy. Among the nanomaterials prepared, TPU-NCs with 1 wt % organoclay provided the best balance between the organoclay concentration and the functional properties desired in biomedical applications.",
publisher = "American Chemical Society (ACS)",
journal = "Industrial and Engineering Chemistry Research",
title = "Influence of the Organoclay Content on the Structure, Morphology, and Surface Related Properties of Novel Poly(dimethylsiloxane)-Based Polyurethane/Organoclay Nanocomposites",
volume = "56",
number = "17",
pages = "4970-4983",
doi = "10.1021/acs.iecr.6b04913"
}

Pergal, M., Stefanović, I., Poreba, R., Steinhart, M., Jovancic, P., Ostojić, S.,& Spirkova, M.. (2017). Influence of the Organoclay Content on the Structure, Morphology, and Surface Related Properties of Novel Poly(dimethylsiloxane)-Based Polyurethane/Organoclay Nanocomposites. in Industrial and Engineering Chemistry Research
American Chemical Society (ACS)., 56(17), 4970-4983.
https://doi.org/10.1021/acs.iecr.6b04913

Pergal M, Stefanović I, Poreba R, Steinhart M, Jovancic P, Ostojić S, Spirkova M. Influence of the Organoclay Content on the Structure, Morphology, and Surface Related Properties of Novel Poly(dimethylsiloxane)-Based Polyurethane/Organoclay Nanocomposites. in Industrial and Engineering Chemistry Research. 2017;56(17):4970-4983.
doi:10.1021/acs.iecr.6b04913 .

Pergal, Marija, Stefanović, Ivan, Poreba, Rafal, Steinhart, Milos, Jovancic, Petar, Ostojić, Sanja, Spirkova, Milena, "Influence of the Organoclay Content on the Structure, Morphology, and Surface Related Properties of Novel Poly(dimethylsiloxane)-Based Polyurethane/Organoclay Nanocomposites" in Industrial and Engineering Chemistry Research, 56, no. 17 (2017):4970-4983,
https://doi.org/10.1021/acs.iecr.6b04913 . .

TY  - JOUR
AU  - Pergal, Marija
AU  - Stefanović, Ivan
AU  - Poreba, Rafal
AU  - Steinhart, Milos
AU  - Jovancic, Petar
AU  - Ostojić, Sanja
AU  - Spirkova, Milena
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3003
AB  - Novel poly(dimethylsiloxane)-based polyurethane nanocomposites (TPU-NCs) were synthesized using in situ polymerization with the nanoclay Cloisite 30B. Differential scanning calorimetry, thermogravimetric analysis, and dynamic mechanical thermal analysis showed that TPU-NCs with an organoclay content of  LT = 5 wt % exhibited increased thermal stability, storage modulus, and hard-segment melt temperatures but decreased degrees of crystallinity. TPU-NCs displayed increased surface hydrophilicity and enhanced surface free energy with increasing organoclay content. Small and wide-angle X-ray scattering confirmed intercalated formations of organoclays in the nanocomposites. Individual clay particles on the surfaces of TPUs with lower organoclay loadings (1 or 3 wt %) or organoclay agglomerates in TPUs with higher amounts of organoclay (>= 5 wt %) were detectable using scanning electron microscopy. The relatively smooth and homogeneous character of pure TPU and the distinctly heterogeneous and rough surfaces of TPU-NCs were detected via atomic force microscopy. Among the nanomaterials prepared, TPU-NCs with 1 wt % organoclay provided the best balance between the organoclay concentration and the functional properties desired in biomedical applications.
PB  - American Chemical Society (ACS)
T2  - Industrial and Engineering Chemistry Research
T1  - Influence of the Organoclay Content on the Structure, Morphology, and Surface Related Properties of Novel Poly(dimethylsiloxane)-Based Polyurethane/Organoclay Nanocomposites
VL  - 56
IS  - 17
SP  - 4970
EP  - 4983
DO  - 10.1021/acs.iecr.6b04913
ER  - 

@article{
author = "Pergal, Marija and Stefanović, Ivan and Poreba, Rafal and Steinhart, Milos and Jovancic, Petar and Ostojić, Sanja and Spirkova, Milena",
year = "2017",
abstract = "Novel poly(dimethylsiloxane)-based polyurethane nanocomposites (TPU-NCs) were synthesized using in situ polymerization with the nanoclay Cloisite 30B. Differential scanning calorimetry, thermogravimetric analysis, and dynamic mechanical thermal analysis showed that TPU-NCs with an organoclay content of  LT = 5 wt % exhibited increased thermal stability, storage modulus, and hard-segment melt temperatures but decreased degrees of crystallinity. TPU-NCs displayed increased surface hydrophilicity and enhanced surface free energy with increasing organoclay content. Small and wide-angle X-ray scattering confirmed intercalated formations of organoclays in the nanocomposites. Individual clay particles on the surfaces of TPUs with lower organoclay loadings (1 or 3 wt %) or organoclay agglomerates in TPUs with higher amounts of organoclay (>= 5 wt %) were detectable using scanning electron microscopy. The relatively smooth and homogeneous character of pure TPU and the distinctly heterogeneous and rough surfaces of TPU-NCs were detected via atomic force microscopy. Among the nanomaterials prepared, TPU-NCs with 1 wt % organoclay provided the best balance between the organoclay concentration and the functional properties desired in biomedical applications.",
publisher = "American Chemical Society (ACS)",
journal = "Industrial and Engineering Chemistry Research",
title = "Influence of the Organoclay Content on the Structure, Morphology, and Surface Related Properties of Novel Poly(dimethylsiloxane)-Based Polyurethane/Organoclay Nanocomposites",
volume = "56",
number = "17",
pages = "4970-4983",
doi = "10.1021/acs.iecr.6b04913"
}

Pergal, M., Stefanović, I., Poreba, R., Steinhart, M., Jovancic, P., Ostojić, S.,& Spirkova, M.. (2017). Influence of the Organoclay Content on the Structure, Morphology, and Surface Related Properties of Novel Poly(dimethylsiloxane)-Based Polyurethane/Organoclay Nanocomposites. in Industrial and Engineering Chemistry Research
American Chemical Society (ACS)., 56(17), 4970-4983.
https://doi.org/10.1021/acs.iecr.6b04913

Pergal M, Stefanović I, Poreba R, Steinhart M, Jovancic P, Ostojić S, Spirkova M. Influence of the Organoclay Content on the Structure, Morphology, and Surface Related Properties of Novel Poly(dimethylsiloxane)-Based Polyurethane/Organoclay Nanocomposites. in Industrial and Engineering Chemistry Research. 2017;56(17):4970-4983.
doi:10.1021/acs.iecr.6b04913 .

Pergal, Marija, Stefanović, Ivan, Poreba, Rafal, Steinhart, Milos, Jovancic, Petar, Ostojić, Sanja, Spirkova, Milena, "Influence of the Organoclay Content on the Structure, Morphology, and Surface Related Properties of Novel Poly(dimethylsiloxane)-Based Polyurethane/Organoclay Nanocomposites" in Industrial and Engineering Chemistry Research, 56, no. 17 (2017):4970-4983,
https://doi.org/10.1021/acs.iecr.6b04913 . .

TY  - JOUR
AU  - Stefanović, Ivan
AU  - Spirkova, Milena
AU  - Poreba, Rafal
AU  - Steinhart, Milos
AU  - Ostojić, Sanja
AU  - Tešević, Vele
AU  - Pergal, Marija
PY  - 2016
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2031
AB  - Segmented polyurethanes (PURs) were prepared from alpha,omega-dihydroxypoly(propylene oxide)-b-poly-(dimethylsiloxane)-b-poly(propyleneoxide) (PPO-PDMS) as the soft segment and 4,4'-diphenylmethane diisocyanate and 1,4-butanediol as the hard segment, via two-step polyaddition process in solvent mixture. The content of hard segments is in the range from 10 to 60 wt %. The structure and composition of PURs are determined by H-1 NMR, C-13 NMR, and ATR-FTIR spectroscopy. Incorporation of PPO-PDMS leads to improvements in thermal stability. Small- and wide-angle X-ray scattering experiments indicate that synthesized PURs with higher content of hard segments have more developed and distinct phase separated morphologies. Dynamic mechanical thermal analysis shows that copolymers have multiple transitions, characteristic for phase-separated systems. The water contact angle increases while water absorption decreases with increasing content of PPO-PDMS segments. The PURs prepared in this work show good thermal, mechanical features with phase separated morphology and high water resistance that enable their widespread application.
PB  - American Chemical Society (ACS)
T2  - Industrial and Engineering Chemistry Research
T1  - Study of the Properties of Urethane-Siloxane Copolymers Based on Poly(propylene oxide)-b-poly(dimethylsiloxane)-b-poly(propylene oxide) Soft Segments
VL  - 55
IS  - 14
SP  - 3960
EP  - 3973
DO  - 10.1021/acs.iecr.5b04975
ER  - 

@article{
author = "Stefanović, Ivan and Spirkova, Milena and Poreba, Rafal and Steinhart, Milos and Ostojić, Sanja and Tešević, Vele and Pergal, Marija",
year = "2016",
abstract = "Segmented polyurethanes (PURs) were prepared from alpha,omega-dihydroxypoly(propylene oxide)-b-poly-(dimethylsiloxane)-b-poly(propyleneoxide) (PPO-PDMS) as the soft segment and 4,4'-diphenylmethane diisocyanate and 1,4-butanediol as the hard segment, via two-step polyaddition process in solvent mixture. The content of hard segments is in the range from 10 to 60 wt %. The structure and composition of PURs are determined by H-1 NMR, C-13 NMR, and ATR-FTIR spectroscopy. Incorporation of PPO-PDMS leads to improvements in thermal stability. Small- and wide-angle X-ray scattering experiments indicate that synthesized PURs with higher content of hard segments have more developed and distinct phase separated morphologies. Dynamic mechanical thermal analysis shows that copolymers have multiple transitions, characteristic for phase-separated systems. The water contact angle increases while water absorption decreases with increasing content of PPO-PDMS segments. The PURs prepared in this work show good thermal, mechanical features with phase separated morphology and high water resistance that enable their widespread application.",
publisher = "American Chemical Society (ACS)",
journal = "Industrial and Engineering Chemistry Research",
title = "Study of the Properties of Urethane-Siloxane Copolymers Based on Poly(propylene oxide)-b-poly(dimethylsiloxane)-b-poly(propylene oxide) Soft Segments",
volume = "55",
number = "14",
pages = "3960-3973",
doi = "10.1021/acs.iecr.5b04975"
}

Stefanović, I., Spirkova, M., Poreba, R., Steinhart, M., Ostojić, S., Tešević, V.,& Pergal, M.. (2016). Study of the Properties of Urethane-Siloxane Copolymers Based on Poly(propylene oxide)-b-poly(dimethylsiloxane)-b-poly(propylene oxide) Soft Segments. in Industrial and Engineering Chemistry Research
American Chemical Society (ACS)., 55(14), 3960-3973.
https://doi.org/10.1021/acs.iecr.5b04975

Stefanović I, Spirkova M, Poreba R, Steinhart M, Ostojić S, Tešević V, Pergal M. Study of the Properties of Urethane-Siloxane Copolymers Based on Poly(propylene oxide)-b-poly(dimethylsiloxane)-b-poly(propylene oxide) Soft Segments. in Industrial and Engineering Chemistry Research. 2016;55(14):3960-3973.
doi:10.1021/acs.iecr.5b04975 .

Stefanović, Ivan, Spirkova, Milena, Poreba, Rafal, Steinhart, Milos, Ostojić, Sanja, Tešević, Vele, Pergal, Marija, "Study of the Properties of Urethane-Siloxane Copolymers Based on Poly(propylene oxide)-b-poly(dimethylsiloxane)-b-poly(propylene oxide) Soft Segments" in Industrial and Engineering Chemistry Research, 55, no. 14 (2016):3960-3973,
https://doi.org/10.1021/acs.iecr.5b04975 . .

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  - Poreba, Rafal
AU  - Ostojić, Sanja
AU  - Radulović, Aleksandra
AU  - Spirkova, Milena
PY  - 2013
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1283
AB  - Poly(urethane-siloxane) networks based on hydroxyethoxy propyl terminated poly(dimethylsiloxane) (PDMS) as the soft segment and 4,4'-methylenediphenyl diisocyanate (MDI) and two hyperbranched polyesters with different core as the hard segments were characterized by swelling experiments, thermal analyses (DSC and TG), thermomechanical analysis (DMTA), X-ray scattering studies, SEM and AFM analyses, water contact angle and water absorption measurements, as well as surface free energy determination. From these studies, structure-property relationships were elucidated. Hyperbranched polyesters based on 2,2-bis(hydroxymethyl)propionic acid and ethoxylated pentaerythritol or di-trimethylolpropane as core (BH-40 and HBP-4) were used as crosslinkers for the samples of different series. Both series are composed of samples having different PDMS (i.e., soft segment) content. The crosslinking density and extent of hydrogen bonding showed an influence on the polyurethane (PU) properties. It was found that higher crosslinking density and better thermal stability of PUs based on BH-40 compared to HBP-4 based PUs are due to the less dense structure of BH-40. DMTA experiments revealed that the networks exhibit two glass transition temperatures, of the soft and hard segments, and one secondary relaxation process. The crosslinking density and extent of the microphase separation increased and thermomechanical properties were improved with decreasing content of PDMS. With increasing PDMS content, the surface of the polyurethane networks became more hydrophobic, the surface free energy decreased and thermal stability was improved. The obtained results revealed that synthesized PUs have good thermal and thermomechanical properties, which can be tailored for the potential use in the coating technology by changing the type of hyperbranched polyester or PDMS content.
PB  - Elsevier Science Sa, Lausanne
T2  - Progress in Organic Coatings
T1  - Microstructure and properties of poly(urethane-siloxane)s based on hyperbranched polyester of the fourth pseudo generation
VL  - 76
IS  - 4
SP  - 743
EP  - 756
DO  - 10.1016/j.porgcoat.2013.01.007
ER  - 

@article{
author = "Pergal, Marija and Džunuzović, Jasna and Poreba, Rafal and Ostojić, Sanja and Radulović, Aleksandra and Spirkova, Milena",
year = "2013",
abstract = "Poly(urethane-siloxane) networks based on hydroxyethoxy propyl terminated poly(dimethylsiloxane) (PDMS) as the soft segment and 4,4'-methylenediphenyl diisocyanate (MDI) and two hyperbranched polyesters with different core as the hard segments were characterized by swelling experiments, thermal analyses (DSC and TG), thermomechanical analysis (DMTA), X-ray scattering studies, SEM and AFM analyses, water contact angle and water absorption measurements, as well as surface free energy determination. From these studies, structure-property relationships were elucidated. Hyperbranched polyesters based on 2,2-bis(hydroxymethyl)propionic acid and ethoxylated pentaerythritol or di-trimethylolpropane as core (BH-40 and HBP-4) were used as crosslinkers for the samples of different series. Both series are composed of samples having different PDMS (i.e., soft segment) content. The crosslinking density and extent of hydrogen bonding showed an influence on the polyurethane (PU) properties. It was found that higher crosslinking density and better thermal stability of PUs based on BH-40 compared to HBP-4 based PUs are due to the less dense structure of BH-40. DMTA experiments revealed that the networks exhibit two glass transition temperatures, of the soft and hard segments, and one secondary relaxation process. The crosslinking density and extent of the microphase separation increased and thermomechanical properties were improved with decreasing content of PDMS. With increasing PDMS content, the surface of the polyurethane networks became more hydrophobic, the surface free energy decreased and thermal stability was improved. The obtained results revealed that synthesized PUs have good thermal and thermomechanical properties, which can be tailored for the potential use in the coating technology by changing the type of hyperbranched polyester or PDMS content.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Progress in Organic Coatings",
title = "Microstructure and properties of poly(urethane-siloxane)s based on hyperbranched polyester of the fourth pseudo generation",
volume = "76",
number = "4",
pages = "743-756",
doi = "10.1016/j.porgcoat.2013.01.007"
}

Pergal, M., Džunuzović, J., Poreba, R., Ostojić, S., Radulović, A.,& Spirkova, M.. (2013). Microstructure and properties of poly(urethane-siloxane)s based on hyperbranched polyester of the fourth pseudo generation. in Progress in Organic Coatings
Elsevier Science Sa, Lausanne., 76(4), 743-756.
https://doi.org/10.1016/j.porgcoat.2013.01.007

Pergal M, Džunuzović J, Poreba R, Ostojić S, Radulović A, Spirkova M. Microstructure and properties of poly(urethane-siloxane)s based on hyperbranched polyester of the fourth pseudo generation. in Progress in Organic Coatings. 2013;76(4):743-756.
doi:10.1016/j.porgcoat.2013.01.007 .

Pergal, Marija, Džunuzović, Jasna, Poreba, Rafal, Ostojić, Sanja, Radulović, Aleksandra, Spirkova, Milena, "Microstructure and properties of poly(urethane-siloxane)s based on hyperbranched polyester of the fourth pseudo generation" in Progress in Organic Coatings, 76, no. 4 (2013):743-756,
https://doi.org/10.1016/j.porgcoat.2013.01.007 . .

TY  - JOUR
AU  - Pergal, Marija
AU  - Džunuzović, Jasna
AU  - Poreba, Rafal
AU  - Steinhart, Milos G.
AU  - Pergal, Miodrag M.
AU  - Vodnik, Vesna
AU  - Spirkova, Milena
PY  - 2013
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1325
AB  - Novel poly(urethane-ester-siloxane) networks, based on hydroxypropyl terminated poly(dimethylsiloxane) (PDMS), 4,4'-methylenediphenyl diisocyanate, and hyperbranched polyesters (HBPs) of the second and third pseudogenerations, were synthesized by two-step polymerization. The effects of the PDMS content and pseudogeneration number of HBPs on the structural, thermomechanical, thermal, and surface properties of polyurethanes were investigated. Thermomechanical and thermal properties of polyurethanes and FTIR, SAXS, and SEM results indicated good microphase separated structure. SAXS data suggested that the difference in the HBP pseudogeneration number affects only the global properties of the structure and is much less pronounced than the dependence on the PDMS content, while local properties depend only on the PDMS content. Surface characterization of samples indicated the slightly amphiphilic nature of polyurethanes. The results revealed that the synthesized polyurethanes have good thermal, thermomechanical, and surface properties, which can be tuned and adjusted for coating application by changing the PDMS content or type of the HBP.
PB  - American Chemical Society (ACS)
T2  - Industrial and Engineering Chemistry Research
T1  - Structure-Property Correlation Study of Novel Poly(urethane-ester-siloxane) Networks
VL  - 52
IS  - 18
SP  - 6164
EP  - 6176
DO  - 10.1021/ie400467j
ER  - 

@article{
author = "Pergal, Marija and Džunuzović, Jasna and Poreba, Rafal and Steinhart, Milos G. and Pergal, Miodrag M. and Vodnik, Vesna and Spirkova, Milena",
year = "2013",
abstract = "Novel poly(urethane-ester-siloxane) networks, based on hydroxypropyl terminated poly(dimethylsiloxane) (PDMS), 4,4'-methylenediphenyl diisocyanate, and hyperbranched polyesters (HBPs) of the second and third pseudogenerations, were synthesized by two-step polymerization. The effects of the PDMS content and pseudogeneration number of HBPs on the structural, thermomechanical, thermal, and surface properties of polyurethanes were investigated. Thermomechanical and thermal properties of polyurethanes and FTIR, SAXS, and SEM results indicated good microphase separated structure. SAXS data suggested that the difference in the HBP pseudogeneration number affects only the global properties of the structure and is much less pronounced than the dependence on the PDMS content, while local properties depend only on the PDMS content. Surface characterization of samples indicated the slightly amphiphilic nature of polyurethanes. The results revealed that the synthesized polyurethanes have good thermal, thermomechanical, and surface properties, which can be tuned and adjusted for coating application by changing the PDMS content or type of the HBP.",
publisher = "American Chemical Society (ACS)",
journal = "Industrial and Engineering Chemistry Research",
title = "Structure-Property Correlation Study of Novel Poly(urethane-ester-siloxane) Networks",
volume = "52",
number = "18",
pages = "6164-6176",
doi = "10.1021/ie400467j"
}

Pergal, M., Džunuzović, J., Poreba, R., Steinhart, M. G., Pergal, M. M., Vodnik, V.,& Spirkova, M.. (2013). Structure-Property Correlation Study of Novel Poly(urethane-ester-siloxane) Networks. in Industrial and Engineering Chemistry Research
American Chemical Society (ACS)., 52(18), 6164-6176.
https://doi.org/10.1021/ie400467j

Pergal M, Džunuzović J, Poreba R, Steinhart MG, Pergal MM, Vodnik V, Spirkova M. Structure-Property Correlation Study of Novel Poly(urethane-ester-siloxane) Networks. in Industrial and Engineering Chemistry Research. 2013;52(18):6164-6176.
doi:10.1021/ie400467j .

Pergal, Marija, Džunuzović, Jasna, Poreba, Rafal, Steinhart, Milos G., Pergal, Miodrag M., Vodnik, Vesna, Spirkova, Milena, "Structure-Property Correlation Study of Novel Poly(urethane-ester-siloxane) Networks" in Industrial and Engineering Chemistry Research, 52, no. 18 (2013):6164-6176,
https://doi.org/10.1021/ie400467j . .

TY  - JOUR
AU  - Džunuzović, Jasna
AU  - Pergal, Marija
AU  - Poreba, Rafal
AU  - Vodnik, Vesna
AU  - Simonović, Branislav
AU  - Spirkova, Milena
AU  - Jovanovic, Slobodan
PY  - 2012
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1042
AB  - Six polyurethane networks were synthesized from Boltorn (R) hyperbranched polyester of the second pseudo generation, alpha,omega-dihydroxy-(ethylene oxide-poly(dimethylsiloxane)-ethylene oxide) (EO-PDMS-EO) and 4,4'-methylenediphenyl diisocyanate. The effect of the EO-PDMS-EO content on the properties of prepared polyurethanes was investigated by dynamic mechanical thermal analysis (DMTA), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), swelling measurements, water contact angle and water absorption. Different techniques (FTIR peak deconvolution, DMTA and SEM) revealed that decrease of EO-PDMS-EO content promotes microphase separation in the synthesized polyurethanes. Samples synthesized with higher EO-PDMS-EO content have more hydrophobic surface and better waterproof performances, but lower crosslinking density. TGA results suggest that thermal stability of the synthesized polyurethane networks in nitrogen is significantly affected by the mutual influence of the crosslinking density and EO-PDMS-EO content. The results obtained in this work indicate that the synthesis of polyurethanes based on hyperbranched polyester and EO-PDMS-EO leads to the creation of networks with good thermal, thermomechanical and surface properties.
PB  - Elsevier
T2  - Journal of Non-Crystalline Solids
T1  - Analysis of dynamic mechanical, thermal and surface properties of poly(urethane-ester-siloxane) networks based on hyperbranched polyester
VL  - 358
IS  - 23
SP  - 3161
EP  - 3169
DO  - 10.1016/j.jnoncrysol.2012.09.013
ER  - 

@article{
author = "Džunuzović, Jasna and Pergal, Marija and Poreba, Rafal and Vodnik, Vesna and Simonović, Branislav and Spirkova, Milena and Jovanovic, Slobodan",
year = "2012",
abstract = "Six polyurethane networks were synthesized from Boltorn (R) hyperbranched polyester of the second pseudo generation, alpha,omega-dihydroxy-(ethylene oxide-poly(dimethylsiloxane)-ethylene oxide) (EO-PDMS-EO) and 4,4'-methylenediphenyl diisocyanate. The effect of the EO-PDMS-EO content on the properties of prepared polyurethanes was investigated by dynamic mechanical thermal analysis (DMTA), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), swelling measurements, water contact angle and water absorption. Different techniques (FTIR peak deconvolution, DMTA and SEM) revealed that decrease of EO-PDMS-EO content promotes microphase separation in the synthesized polyurethanes. Samples synthesized with higher EO-PDMS-EO content have more hydrophobic surface and better waterproof performances, but lower crosslinking density. TGA results suggest that thermal stability of the synthesized polyurethane networks in nitrogen is significantly affected by the mutual influence of the crosslinking density and EO-PDMS-EO content. The results obtained in this work indicate that the synthesis of polyurethanes based on hyperbranched polyester and EO-PDMS-EO leads to the creation of networks with good thermal, thermomechanical and surface properties.",
publisher = "Elsevier",
journal = "Journal of Non-Crystalline Solids",
title = "Analysis of dynamic mechanical, thermal and surface properties of poly(urethane-ester-siloxane) networks based on hyperbranched polyester",
volume = "358",
number = "23",
pages = "3161-3169",
doi = "10.1016/j.jnoncrysol.2012.09.013"
}

Džunuzović, J., Pergal, M., Poreba, R., Vodnik, V., Simonović, B., Spirkova, M.,& Jovanovic, S.. (2012). Analysis of dynamic mechanical, thermal and surface properties of poly(urethane-ester-siloxane) networks based on hyperbranched polyester. in Journal of Non-Crystalline Solids
Elsevier., 358(23), 3161-3169.
https://doi.org/10.1016/j.jnoncrysol.2012.09.013

Džunuzović J, Pergal M, Poreba R, Vodnik V, Simonović B, Spirkova M, Jovanovic S. Analysis of dynamic mechanical, thermal and surface properties of poly(urethane-ester-siloxane) networks based on hyperbranched polyester. in Journal of Non-Crystalline Solids. 2012;358(23):3161-3169.
doi:10.1016/j.jnoncrysol.2012.09.013 .

Džunuzović, Jasna, Pergal, Marija, Poreba, Rafal, Vodnik, Vesna, Simonović, Branislav, Spirkova, Milena, Jovanovic, Slobodan, "Analysis of dynamic mechanical, thermal and surface properties of poly(urethane-ester-siloxane) networks based on hyperbranched polyester" in Journal of Non-Crystalline Solids, 358, no. 23 (2012):3161-3169,
https://doi.org/10.1016/j.jnoncrysol.2012.09.013 . .

TY  - JOUR
AU  - Džunuzović, Jasna
AU  - Pergal, Marija
AU  - Poreba, Rafal
AU  - Ostojić, Sanja
AU  - Lazić, Nada
AU  - Spirkova, Milena
AU  - Jovanovic, Slobodan
PY  - 2012
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1113
AB  - Polyurethane networks based on Boltorn hyperbranched polyesters (HBPs) of different pseudogenerations as cross-linkers, alpha,omega-dihydroxy(ethylene oxide-poly(dimethylsiloxane)-ethylene oxide) (EO-PDMS-EO) and 4,4'-methylenediphenyl diisocyanate were synthesized using a two-step polymerization reaction in solution. The influence of the pseudogeneration number of Boltorn HBPs on the thermomechanical and thermal properties and morphologies of polyurethane networks was investigated using FTIR, DMTA, TGA, hardness measurements, SEM, and SAXS. Synthesized polyurethanes showed higher cross-linking density and hardness and lower thermal stability with increasing pseudogeneration number of HBP. Samples with lower EO-PDMS-EO content exhibited slightly better thermal stability and higher hardness. All utilized characterization methods yielded consistent results and confirmed the existence of microphase separated morphology with the appearance of certain microphase mixing between segments as the pseudogeneration number of HBP increased. The obtained results revealed that the synthesized polyurethanes have good thermal and thermomechanical properties, which can be tailored by changing the pseudogeneration number of the HBP or the EO-PDMS-EO content.
PB  - American Chemical Society (ACS)
T2  - Industrial and Engineering Chemistry Research
T1  - Studies of the Thermal and Mechanical Properties of Poly(urethane-siloxane)s Cross-Linked by Hyperbranched Polyesters
VL  - 51
IS  - 33
SP  - 10824
EP  - 10832
DO  - 10.1021/ie300927z
ER  - 

@article{
author = "Džunuzović, Jasna and Pergal, Marija and Poreba, Rafal and Ostojić, Sanja and Lazić, Nada and Spirkova, Milena and Jovanovic, Slobodan",
year = "2012",
abstract = "Polyurethane networks based on Boltorn hyperbranched polyesters (HBPs) of different pseudogenerations as cross-linkers, alpha,omega-dihydroxy(ethylene oxide-poly(dimethylsiloxane)-ethylene oxide) (EO-PDMS-EO) and 4,4'-methylenediphenyl diisocyanate were synthesized using a two-step polymerization reaction in solution. The influence of the pseudogeneration number of Boltorn HBPs on the thermomechanical and thermal properties and morphologies of polyurethane networks was investigated using FTIR, DMTA, TGA, hardness measurements, SEM, and SAXS. Synthesized polyurethanes showed higher cross-linking density and hardness and lower thermal stability with increasing pseudogeneration number of HBP. Samples with lower EO-PDMS-EO content exhibited slightly better thermal stability and higher hardness. All utilized characterization methods yielded consistent results and confirmed the existence of microphase separated morphology with the appearance of certain microphase mixing between segments as the pseudogeneration number of HBP increased. The obtained results revealed that the synthesized polyurethanes have good thermal and thermomechanical properties, which can be tailored by changing the pseudogeneration number of the HBP or the EO-PDMS-EO content.",
publisher = "American Chemical Society (ACS)",
journal = "Industrial and Engineering Chemistry Research",
title = "Studies of the Thermal and Mechanical Properties of Poly(urethane-siloxane)s Cross-Linked by Hyperbranched Polyesters",
volume = "51",
number = "33",
pages = "10824-10832",
doi = "10.1021/ie300927z"
}

Džunuzović, J., Pergal, M., Poreba, R., Ostojić, S., Lazić, N., Spirkova, M.,& Jovanovic, S.. (2012). Studies of the Thermal and Mechanical Properties of Poly(urethane-siloxane)s Cross-Linked by Hyperbranched Polyesters. in Industrial and Engineering Chemistry Research
American Chemical Society (ACS)., 51(33), 10824-10832.
https://doi.org/10.1021/ie300927z

Džunuzović J, Pergal M, Poreba R, Ostojić S, Lazić N, Spirkova M, Jovanovic S. Studies of the Thermal and Mechanical Properties of Poly(urethane-siloxane)s Cross-Linked by Hyperbranched Polyesters. in Industrial and Engineering Chemistry Research. 2012;51(33):10824-10832.
doi:10.1021/ie300927z .

Džunuzović, Jasna, Pergal, Marija, Poreba, Rafal, Ostojić, Sanja, Lazić, Nada, Spirkova, Milena, Jovanovic, Slobodan, "Studies of the Thermal and Mechanical Properties of Poly(urethane-siloxane)s Cross-Linked by Hyperbranched Polyesters" in Industrial and Engineering Chemistry Research, 51, no. 33 (2012):10824-10832,
https://doi.org/10.1021/ie300927z . .