TY  - JOUR
AU  - Pergal, Marija
AU  - Antić, Vesna
AU  - Govedarica, Milutin
AU  - Gođevac, Dejan
AU  - Ostojić, Sanja
AU  - Đonlagić, Jasna
PY  - 2011
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5658
AB  - Novel polyurethane copolymers derived from 4,4'-methylenediphenyl diisocyanate (MDI), 1,4-butanediol (BD) and alpha, omega-dihydroxy-[poly(caprolactone)-poly (dimethylsiloxane)-poly(caprolactone)] (a, x-dihydroxy( PCL-PDMS-PCL); (M) over bar (n) 6100 g mol(-1)) were synthesized by a two-step polyaddition reaction in solution. In the synthesis of the polyurethanes, the PCL blocks served as a compatibilizer between the nonpolar PDMS blocks and the polar comonomers, MDI and BD. The synthesis of thermoplastic polyurethanes (TPU) with high soft segment contents was optimized in terms of the concentrations of the reactants, the molar ratio of the NCO/OH groups, and the time and temperature of the polyaddition reaction. The structure, composition, and hard MDI/BD segment length of the synthesized polyurethane copolymers were determined by H-1, C-13-NMR, and two-dimensional correlation (COSY, HSQC, and HMBC) spectroscopy, while the hydrogen bonding interactions in the copolymers were analyzed by FT-IR spectroscopy. The influence of the reaction conditions on the structure, molecular weight, thermal, and some physical properties was studied at constant composition of the reaction mixture. A change in the molar ratio of the NCO/OH groups and the reaction conditions modified not only the molecular weight of the synthesized polyurethanes, but also the microstructure and therefore the thermal and physical properties of the copolymers. It was demonstrated that only PCL segments with high soft segment contents crystallize, thereby showing spherulitic morphology.
PB  - Wiley-Blackwell, Malden
T2  - Journal of Applied Polymer Science
T1  - Synthesis and Characterization of Novel Urethane-Siloxane Copolymers with a High Content of PCL-PDMS-PCL Segments
EP  - 2730
IS  - 4
SP  - 2715
VL  - 122
DO  - 10.1002/app.33926
ER  - 

@article{
author = "Pergal, Marija and Antić, Vesna and Govedarica, Milutin and Gođevac, Dejan and Ostojić, Sanja and Đonlagić, Jasna",
year = "2011",
abstract = "Novel polyurethane copolymers derived from 4,4'-methylenediphenyl diisocyanate (MDI), 1,4-butanediol (BD) and alpha, omega-dihydroxy-[poly(caprolactone)-poly (dimethylsiloxane)-poly(caprolactone)] (a, x-dihydroxy( PCL-PDMS-PCL); (M) over bar (n) 6100 g mol(-1)) were synthesized by a two-step polyaddition reaction in solution. In the synthesis of the polyurethanes, the PCL blocks served as a compatibilizer between the nonpolar PDMS blocks and the polar comonomers, MDI and BD. The synthesis of thermoplastic polyurethanes (TPU) with high soft segment contents was optimized in terms of the concentrations of the reactants, the molar ratio of the NCO/OH groups, and the time and temperature of the polyaddition reaction. The structure, composition, and hard MDI/BD segment length of the synthesized polyurethane copolymers were determined by H-1, C-13-NMR, and two-dimensional correlation (COSY, HSQC, and HMBC) spectroscopy, while the hydrogen bonding interactions in the copolymers were analyzed by FT-IR spectroscopy. The influence of the reaction conditions on the structure, molecular weight, thermal, and some physical properties was studied at constant composition of the reaction mixture. A change in the molar ratio of the NCO/OH groups and the reaction conditions modified not only the molecular weight of the synthesized polyurethanes, but also the microstructure and therefore the thermal and physical properties of the copolymers. It was demonstrated that only PCL segments with high soft segment contents crystallize, thereby showing spherulitic morphology.",
publisher = "Wiley-Blackwell, Malden",
journal = "Journal of Applied Polymer Science",
title = "Synthesis and Characterization of Novel Urethane-Siloxane Copolymers with a High Content of PCL-PDMS-PCL Segments",
pages = "2730-2715",
number = "4",
volume = "122",
doi = "10.1002/app.33926"
}

Pergal, M., Antić, V., Govedarica, M., Gođevac, D., Ostojić, S.,& Đonlagić, J.. (2011). Synthesis and Characterization of Novel Urethane-Siloxane Copolymers with a High Content of PCL-PDMS-PCL Segments. in Journal of Applied Polymer Science
Wiley-Blackwell, Malden., 122(4), 2715-2730.
https://doi.org/10.1002/app.33926

Pergal M, Antić V, Govedarica M, Gođevac D, Ostojić S, Đonlagić J. Synthesis and Characterization of Novel Urethane-Siloxane Copolymers with a High Content of PCL-PDMS-PCL Segments. in Journal of Applied Polymer Science. 2011;122(4):2715-2730.
doi:10.1002/app.33926 .

Pergal, Marija, Antić, Vesna, Govedarica, Milutin, Gođevac, Dejan, Ostojić, Sanja, Đonlagić, Jasna, "Synthesis and Characterization of Novel Urethane-Siloxane Copolymers with a High Content of PCL-PDMS-PCL Segments" in Journal of Applied Polymer Science, 122, no. 4 (2011):2715-2730,
https://doi.org/10.1002/app.33926 . .

TY  - JOUR
AU  - Vučković, Marija V.
AU  - Antić, Vesna
AU  - Govedarica, Milutin
AU  - Đonlagić, Jasna
PY  - 2010
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5615
AB  - A series of thermoplastic elastomers based on ethylene oxide- poly(dimethylsiloxane)-ethylene oxide (EO-PDMS-EO), as the soft segment, and poly(butylene terephthalate) (PBT), as the hard segment, were synthesized by catalyzed two-step, melt transesterification reaction of dimethyl terephthalate (DMT) with 1, 4-butanediol (BD) and α, ω-dihydroxy-(EO-PDMS-EO). Copolymers with a content of hard PBT segments between 40 and 90 mass % and a constant length of the soft EO-PDMS-EO segments were prepared. The siloxane prepolymer with hydrophilic terminal EO units was used to improve the miscibility between the polar comonomers, DMT and BD, and the nonpolar PDMS. The molecular structure and composition of the copolymers were determined by 1HNMR spectroscopy, whereas the effectiveness of the incorporation of α, ω-dihydroxy-(EO-PDMS-EO) into the copolymer chains was verified by chloroform extraction. The effects of the structure and composition of the copolymers on the melting temperatures and the degree of crystallinity, as well as on the thermal degradation stability and some rheological properties, were studied. It was demonstrated that the degree of crystallinity, the melting and crystallization temperatures of the copolymers increased with increasing mass fraction of the PBT segments. The thermal stability of the copolymers was lower than that of PBT homopolymer, because of the presence of thermoliable ether bonds in the soft segments.
PB  - Wiley
T2  - Journal of Applied Polymer Science
T1  - Synthesis and characterization of copolymers based on poly(butylene terephthalate) and ethylene oxide-poly(dimethylsiloxane)-ethylene oxide
EP  - 3216
IS  - 6
SP  - 3205
VL  - 115
DO  - 10.1002/app.31416
ER  - 

@article{
author = "Vučković, Marija V. and Antić, Vesna and Govedarica, Milutin and Đonlagić, Jasna",
year = "2010",
abstract = "A series of thermoplastic elastomers based on ethylene oxide- poly(dimethylsiloxane)-ethylene oxide (EO-PDMS-EO), as the soft segment, and poly(butylene terephthalate) (PBT), as the hard segment, were synthesized by catalyzed two-step, melt transesterification reaction of dimethyl terephthalate (DMT) with 1, 4-butanediol (BD) and α, ω-dihydroxy-(EO-PDMS-EO). Copolymers with a content of hard PBT segments between 40 and 90 mass % and a constant length of the soft EO-PDMS-EO segments were prepared. The siloxane prepolymer with hydrophilic terminal EO units was used to improve the miscibility between the polar comonomers, DMT and BD, and the nonpolar PDMS. The molecular structure and composition of the copolymers were determined by 1HNMR spectroscopy, whereas the effectiveness of the incorporation of α, ω-dihydroxy-(EO-PDMS-EO) into the copolymer chains was verified by chloroform extraction. The effects of the structure and composition of the copolymers on the melting temperatures and the degree of crystallinity, as well as on the thermal degradation stability and some rheological properties, were studied. It was demonstrated that the degree of crystallinity, the melting and crystallization temperatures of the copolymers increased with increasing mass fraction of the PBT segments. The thermal stability of the copolymers was lower than that of PBT homopolymer, because of the presence of thermoliable ether bonds in the soft segments.",
publisher = "Wiley",
journal = "Journal of Applied Polymer Science",
title = "Synthesis and characterization of copolymers based on poly(butylene terephthalate) and ethylene oxide-poly(dimethylsiloxane)-ethylene oxide",
pages = "3216-3205",
number = "6",
volume = "115",
doi = "10.1002/app.31416"
}

Vučković, M. V., Antić, V., Govedarica, M.,& Đonlagić, J.. (2010). Synthesis and characterization of copolymers based on poly(butylene terephthalate) and ethylene oxide-poly(dimethylsiloxane)-ethylene oxide. in Journal of Applied Polymer Science
Wiley., 115(6), 3205-3216.
https://doi.org/10.1002/app.31416

Vučković MV, Antić V, Govedarica M, Đonlagić J. Synthesis and characterization of copolymers based on poly(butylene terephthalate) and ethylene oxide-poly(dimethylsiloxane)-ethylene oxide. in Journal of Applied Polymer Science. 2010;115(6):3205-3216.
doi:10.1002/app.31416 .

Vučković, Marija V., Antić, Vesna, Govedarica, Milutin, Đonlagić, Jasna, "Synthesis and characterization of copolymers based on poly(butylene terephthalate) and ethylene oxide-poly(dimethylsiloxane)-ethylene oxide" in Journal of Applied Polymer Science, 115, no. 6 (2010):3205-3216,
https://doi.org/10.1002/app.31416 . .

TY  - JOUR
AU  - Vučković, Marija V.
AU  - Antić, Vesna V.
AU  - Dojčinović, Biljana P.
AU  - Govedarica, Milutin N.
AU  - Đonlagić, Jasna
PY  - 2006
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5472
AB  - A series of novel thermoplastic elastomers based on ABA-type triblock prepolymers, poly[(propylene oxide)-(dimethylsiloxane)-(propylene oxide)] (PPO-PDMS-PPO), as the soft segments, and poly(butylene terephthalate) (PBT), as the hard segments, was synthesized by catalyzed two-step melt transesterification of dimethyl terephthalate (DMT) with 1,4-butanediol (BD) and α,ω-dihydroxy-(PPO-PDMS-PPO) (M̄ n = 2930 g mol -1 ). Several copolymers with a content of hard PBT segments between 40 and 60 mass% and a constant length of the soft PPO-PDMS-PPO segments were prepared. The siloxane-containing triblock prepolymer with hydrophilic terminal PPO blocks was used to improve the compatibility between the polar comonomers, i.e. DMT and BD, and the non-polar PDMS segments. The structure and composition of the copolymers were examined using 1 H NMR spectroscopy, while the effectiveness of the incorporation of α,ω-dihydroxy-(PPO-PDMS-PPO) prepolymer into the copolyester chains was controlled by chloroform extraction. The effect of the structure and composition of the copolymers on the transition temperatures (T m and T g ) and the thermal and thermo-oxidative degradation stability, as well as on the degree of crystallinity, and some rheological properties, were studied.
PB  - John Wiley and Sons Ltd
T2  - Polymer International
T1  - Synthesis and characterization of poly(ester ether siloxane)s
EP  - 1314
IS  - 11
SP  - 1304
VL  - 55
DO  - 10.1002/pi.2085
ER  - 

@article{
author = "Vučković, Marija V. and Antić, Vesna V. and Dojčinović, Biljana P. and Govedarica, Milutin N. and Đonlagić, Jasna",
year = "2006",
abstract = "A series of novel thermoplastic elastomers based on ABA-type triblock prepolymers, poly[(propylene oxide)-(dimethylsiloxane)-(propylene oxide)] (PPO-PDMS-PPO), as the soft segments, and poly(butylene terephthalate) (PBT), as the hard segments, was synthesized by catalyzed two-step melt transesterification of dimethyl terephthalate (DMT) with 1,4-butanediol (BD) and α,ω-dihydroxy-(PPO-PDMS-PPO) (M̄ n = 2930 g mol -1 ). Several copolymers with a content of hard PBT segments between 40 and 60 mass% and a constant length of the soft PPO-PDMS-PPO segments were prepared. The siloxane-containing triblock prepolymer with hydrophilic terminal PPO blocks was used to improve the compatibility between the polar comonomers, i.e. DMT and BD, and the non-polar PDMS segments. The structure and composition of the copolymers were examined using 1 H NMR spectroscopy, while the effectiveness of the incorporation of α,ω-dihydroxy-(PPO-PDMS-PPO) prepolymer into the copolyester chains was controlled by chloroform extraction. The effect of the structure and composition of the copolymers on the transition temperatures (T m and T g ) and the thermal and thermo-oxidative degradation stability, as well as on the degree of crystallinity, and some rheological properties, were studied.",
publisher = "John Wiley and Sons Ltd",
journal = "Polymer International",
title = "Synthesis and characterization of poly(ester ether siloxane)s",
pages = "1314-1304",
number = "11",
volume = "55",
doi = "10.1002/pi.2085"
}

Vučković, M. V., Antić, V. V., Dojčinović, B. P., Govedarica, M. N.,& Đonlagić, J.. (2006). Synthesis and characterization of poly(ester ether siloxane)s. in Polymer International
John Wiley and Sons Ltd., 55(11), 1304-1314.
https://doi.org/10.1002/pi.2085

Vučković MV, Antić VV, Dojčinović BP, Govedarica MN, Đonlagić J. Synthesis and characterization of poly(ester ether siloxane)s. in Polymer International. 2006;55(11):1304-1314.
doi:10.1002/pi.2085 .

Vučković, Marija V., Antić, Vesna V., Dojčinović, Biljana P., Govedarica, Milutin N., Đonlagić, Jasna, "Synthesis and characterization of poly(ester ether siloxane)s" in Polymer International, 55, no. 11 (2006):1304-1314,
https://doi.org/10.1002/pi.2085 . .

TY  - JOUR
AU  - Antić, Vesna V.
AU  - Govedarica, Milutin N.
AU  - Đonlagić, Jasna
PY  - 2004
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5405
AB  - A series of thermoplastic elastomers based on soft polydimethylsiloxane (PDMS) and hard poly(butylene terephthalate) (PBT) segments was synthesized using a two-step transesterification reaction in the melt. The molar mass of the soft PDMS component was constant (M̄ n P DMS = 1056 g mol -1 ) while the starting reaction mixture compositions were varied to obtained copolymers with a mass ratio of hard to soft segments in the range from 70/30 to 40/60. The structure and composition of the copolymers was verified by 1 H NMR spectroscopy. It appeared that there was a pronounced molar mass maximum when the PBT content of the copolymers was approximately 60 mass%, whereas all samples were considerably inhomogeneous with respect to the distribution of the lengths of the hard segments. Differential scanning calorimetry-(DSC) thermograms showed that the melting and crystallization temperature increased with increasing PBT content, as did the total degree of crystallinity, which was confirmed by wide-angle X-ray scattering (WAXS) analysis. Thermogravimetric analysis (TGA) performed in nitrogen gave subtle differences for samples of different composition, including that of the PBT homopolymer, whereas in oxygen these differences were more pronounced in the way the thermo-oxidative stability of the obtained copolymers decreased with decreasing PBT content. Finally, it was shown that the hardness depended directly on the PBT content, ie the higher the PBT content, the greater the hardness of the corresponding copolymer.
PB  - John Wiley and Sons Ltd
T2  - Polymer International
T1  - The effect of the mass ratio of hard and soft segments on some properties of thermoplastic poly(ester-siloxane)s
EP  - 1794
IS  - 11
SP  - 1786
VL  - 53
DO  - 10.1002/pi.1582
ER  - 

@article{
author = "Antić, Vesna V. and Govedarica, Milutin N. and Đonlagić, Jasna",
year = "2004",
abstract = "A series of thermoplastic elastomers based on soft polydimethylsiloxane (PDMS) and hard poly(butylene terephthalate) (PBT) segments was synthesized using a two-step transesterification reaction in the melt. The molar mass of the soft PDMS component was constant (M̄ n P DMS = 1056 g mol -1 ) while the starting reaction mixture compositions were varied to obtained copolymers with a mass ratio of hard to soft segments in the range from 70/30 to 40/60. The structure and composition of the copolymers was verified by 1 H NMR spectroscopy. It appeared that there was a pronounced molar mass maximum when the PBT content of the copolymers was approximately 60 mass%, whereas all samples were considerably inhomogeneous with respect to the distribution of the lengths of the hard segments. Differential scanning calorimetry-(DSC) thermograms showed that the melting and crystallization temperature increased with increasing PBT content, as did the total degree of crystallinity, which was confirmed by wide-angle X-ray scattering (WAXS) analysis. Thermogravimetric analysis (TGA) performed in nitrogen gave subtle differences for samples of different composition, including that of the PBT homopolymer, whereas in oxygen these differences were more pronounced in the way the thermo-oxidative stability of the obtained copolymers decreased with decreasing PBT content. Finally, it was shown that the hardness depended directly on the PBT content, ie the higher the PBT content, the greater the hardness of the corresponding copolymer.",
publisher = "John Wiley and Sons Ltd",
journal = "Polymer International",
title = "The effect of the mass ratio of hard and soft segments on some properties of thermoplastic poly(ester-siloxane)s",
pages = "1794-1786",
number = "11",
volume = "53",
doi = "10.1002/pi.1582"
}

Antić, V. V., Govedarica, M. N.,& Đonlagić, J.. (2004). The effect of the mass ratio of hard and soft segments on some properties of thermoplastic poly(ester-siloxane)s. in Polymer International
John Wiley and Sons Ltd., 53(11), 1786-1794.
https://doi.org/10.1002/pi.1582

Antić VV, Govedarica MN, Đonlagić J. The effect of the mass ratio of hard and soft segments on some properties of thermoplastic poly(ester-siloxane)s. in Polymer International. 2004;53(11):1786-1794.
doi:10.1002/pi.1582 .

Antić, Vesna V., Govedarica, Milutin N., Đonlagić, Jasna, "The effect of the mass ratio of hard and soft segments on some properties of thermoplastic poly(ester-siloxane)s" in Polymer International, 53, no. 11 (2004):1786-1794,
https://doi.org/10.1002/pi.1582 . .

TY  - JOUR
AU  - Antić, Vesna V.
AU  - Govedarica, Milutin N.
AU  - Đonlagić, Jasna
PY  - 2003
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5400
AB  - A series of novel thermoplastic elastomers, based on poly(dimethylsiloxane) (PDMS) as the soft segment and poly(butylene terephthalate) (PBT) as the hard segment, were synthesized by catalyzed two-step, melt transesterification reactions of dimethyl terephthalate and methyl esters of carboxypropyl-terminated poly(dimethylsiloxane)s (M̄ n = 550-2170 g mol -1 ) with 1,4-butanediol. The lengths of both the hard and soft segments were varied while the weight ratio of the hard to soft segments in the reaction mixture was maintained constant (57/43). The molecular structure, composition and molecular weights of the poly(ester-siloxane)s were examined by 1 H NMR spectroscopy. The effectiveness of the incorporation of the methyl-ester-terminated poly(dimethylsiloxane)s into the copolymer chains was verified by chloroform extraction. The effect of the segment length on the transition temperatures (T m and T g ) and the thermal and thermo-oxidative degradation stability, as well as the degree of crystallinity and hardness properties of the synthesized TPESs, were studied.
PB  - John Wiley and Sons Ltd
T2  - Polymer International
T1  - The effect of segment length on some properties of thermoplastic poly(ester-siloxane)s
EP  - 1197
IS  - 7
SP  - 1188
VL  - 52
DO  - 10.1002/pi.1241
ER  - 

@article{
author = "Antić, Vesna V. and Govedarica, Milutin N. and Đonlagić, Jasna",
year = "2003",
abstract = "A series of novel thermoplastic elastomers, based on poly(dimethylsiloxane) (PDMS) as the soft segment and poly(butylene terephthalate) (PBT) as the hard segment, were synthesized by catalyzed two-step, melt transesterification reactions of dimethyl terephthalate and methyl esters of carboxypropyl-terminated poly(dimethylsiloxane)s (M̄ n = 550-2170 g mol -1 ) with 1,4-butanediol. The lengths of both the hard and soft segments were varied while the weight ratio of the hard to soft segments in the reaction mixture was maintained constant (57/43). The molecular structure, composition and molecular weights of the poly(ester-siloxane)s were examined by 1 H NMR spectroscopy. The effectiveness of the incorporation of the methyl-ester-terminated poly(dimethylsiloxane)s into the copolymer chains was verified by chloroform extraction. The effect of the segment length on the transition temperatures (T m and T g ) and the thermal and thermo-oxidative degradation stability, as well as the degree of crystallinity and hardness properties of the synthesized TPESs, were studied.",
publisher = "John Wiley and Sons Ltd",
journal = "Polymer International",
title = "The effect of segment length on some properties of thermoplastic poly(ester-siloxane)s",
pages = "1197-1188",
number = "7",
volume = "52",
doi = "10.1002/pi.1241"
}

Antić, V. V., Govedarica, M. N.,& Đonlagić, J.. (2003). The effect of segment length on some properties of thermoplastic poly(ester-siloxane)s. in Polymer International
John Wiley and Sons Ltd., 52(7), 1188-1197.
https://doi.org/10.1002/pi.1241

Antić VV, Govedarica MN, Đonlagić J. The effect of segment length on some properties of thermoplastic poly(ester-siloxane)s. in Polymer International. 2003;52(7):1188-1197.
doi:10.1002/pi.1241 .

Antić, Vesna V., Govedarica, Milutin N., Đonlagić, Jasna, "The effect of segment length on some properties of thermoplastic poly(ester-siloxane)s" in Polymer International, 52, no. 7 (2003):1188-1197,
https://doi.org/10.1002/pi.1241 . .