TY  - JOUR
AU  - Džunuzović, Jasna V.
AU  - Pergal, Marija V.
AU  - Jovanović, Slobodan
AU  - Vodnik, Vesna
PY  - 2011
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5659
AB  - A series of six polyurethane (PU) networks was synthesized from Boltorn (R) hydroxy-functional hyperbranched polyester (HBP) of the second pseudo generation as a cross-linking agent, alpha,omega-dihydroxy-(ethylene oxide-poly(dimethylsiloxane)-ethylene oxide) (EO-PDMS-EO) and 4,4-methylenediphenyl diisocyanate, by two-step polymerization in solution. Each sample of the prepared PUs had different EO-PDMS-EO content. The chemical structure of the synthesized networks was analyzed by FTIR spectroscopy. The influence of the EO-PDMS-EO content and type of the solvent on the swelling behavior of the PUs in 2-propanol and toluene was investigated. During the swelling measurements, a certain amount of sal fractions was extracted from the PUs by solvents. According to the H-1-NMR results, sal fractions were mainly composed of the soluble hyperbranched PU, formed during the polymerization by partial modification of the end hydroxyl groups of HBP with NCO-terminated prepolymer synthesized in the first step of the reaction. Chains of the so reacted prepolymer can then fold back and form cyclic products by reaction of the free -NCO group from the NCO-terminated prepolymer with free -OH group of HBP. As the EO-PDMS-EO content increases the amount of the sol fractions and swelling degree also increased, indicating that networks with lower EO-PDMS-EO content are more cross-linked and have higher solvent resistance.
T2  - Hemijska industrija
T1  - Synthesis and swelling behavior of polyurethane networks based on hyperbranched polymer
EP  - 644
IS  - 6
SP  - 637
VL  - 65
DO  - 10.2298/HEMIND110902071D
ER  - 

@article{
author = "Džunuzović, Jasna V. and Pergal, Marija V. and Jovanović, Slobodan and Vodnik, Vesna",
year = "2011",
abstract = "A series of six polyurethane (PU) networks was synthesized from Boltorn (R) hydroxy-functional hyperbranched polyester (HBP) of the second pseudo generation as a cross-linking agent, alpha,omega-dihydroxy-(ethylene oxide-poly(dimethylsiloxane)-ethylene oxide) (EO-PDMS-EO) and 4,4-methylenediphenyl diisocyanate, by two-step polymerization in solution. Each sample of the prepared PUs had different EO-PDMS-EO content. The chemical structure of the synthesized networks was analyzed by FTIR spectroscopy. The influence of the EO-PDMS-EO content and type of the solvent on the swelling behavior of the PUs in 2-propanol and toluene was investigated. During the swelling measurements, a certain amount of sal fractions was extracted from the PUs by solvents. According to the H-1-NMR results, sal fractions were mainly composed of the soluble hyperbranched PU, formed during the polymerization by partial modification of the end hydroxyl groups of HBP with NCO-terminated prepolymer synthesized in the first step of the reaction. Chains of the so reacted prepolymer can then fold back and form cyclic products by reaction of the free -NCO group from the NCO-terminated prepolymer with free -OH group of HBP. As the EO-PDMS-EO content increases the amount of the sol fractions and swelling degree also increased, indicating that networks with lower EO-PDMS-EO content are more cross-linked and have higher solvent resistance.",
journal = "Hemijska industrija",
title = "Synthesis and swelling behavior of polyurethane networks based on hyperbranched polymer",
pages = "644-637",
number = "6",
volume = "65",
doi = "10.2298/HEMIND110902071D"
}

Džunuzović, J. V., Pergal, M. V., Jovanović, S.,& Vodnik, V.. (2011). Synthesis and swelling behavior of polyurethane networks based on hyperbranched polymer. in Hemijska industrija, 65(6), 637-644.
https://doi.org/10.2298/HEMIND110902071D

Džunuzović JV, Pergal MV, Jovanović S, Vodnik V. Synthesis and swelling behavior of polyurethane networks based on hyperbranched polymer. in Hemijska industrija. 2011;65(6):637-644.
doi:10.2298/HEMIND110902071D .

Džunuzović, Jasna V., Pergal, Marija V., Jovanović, Slobodan, Vodnik, Vesna, "Synthesis and swelling behavior of polyurethane networks based on hyperbranched polymer" in Hemijska industrija, 65, no. 6 (2011):637-644,
https://doi.org/10.2298/HEMIND110902071D . .

TY  - JOUR
AU  - Pergal, Marija V.
AU  - Antić, Vesna V.
AU  - Ostojić, Sanja
AU  - Marinović-Cincović, Milena
AU  - Đonlagić, Jasna A.
PY  - 2011
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5638
AB  - A series of novel thermoplastic urethane-siloxane copolymers (TPUSs) based on a alpha,omega-dihydroxy-[poly(epsilon-caprolactone)-b-poly(dimethylsiloxane)-b-poly(epsilon-caprolactone)] (alpha,omega-dihydroxy-PCL-PDMS-PCL) triblock. copolymer, 4,4-methylenediphenyl diisocyanate (MDI) and 1,4-butanediol (BD) was synthesized. The effects of the content (9-63 mass %) of hard urethane segments and their degree of polymerization on the properties of the segmented TPUSs were investigated. The structure, composition and hard segment degree of polymerization of the hard segments were examined using (1)H- and quantitative (13)C-NMR spectroscopy. The degree of crystallinity of the synthesized copolymers was determined using wide-angle X-ray scattering (WAXS). The surface properties were evaluated by measuring the water contact angle and water absorption. In the series of the TPUSs, the average degree of polymerization of the hard segments was varied from 1.2 to 14.4 MDI-BD units. It was found that average values from 3.8 to 14.4 MDI-BD units were effective segment lengths for crystallization of hard segments, which resulted in an increase in the degree of microphase separation of the copolymers. Spherulite-like superstructures were observed in copolymer films by scanning electron microscopy (SEM), which are believed to arise from the crystallization of the hard segments and/or PCL segments, depending on the content of the hard segments. The surface of the copolymers became more hydrophobic with increasing weight fraction of PDMS. The synthesized copolymers based on a PCL-PDMS-PCL segment showed good thermal stability, which increased with increasing content of soft PDMS segments, as was confirmed by the value of the starting temperature of thermal degradation.
T2  - Journal of the Serbian Chemical Society
T1  - Influence of the content of hard segments on the properties of novel urethane-siloxane copolymers based on a poly(epsilon-caprolactone)-b-poly(dimethylsiloxane)-b-poly(epsilon-caprolactone) triblock copolymer
EP  - 1723
IS  - 12
SP  - 1703
VL  - 76
DO  - 10.2298/JSC110307146P
ER  - 

@article{
author = "Pergal, Marija V. and Antić, Vesna V. and Ostojić, Sanja and Marinović-Cincović, Milena and Đonlagić, Jasna A.",
year = "2011",
abstract = "A series of novel thermoplastic urethane-siloxane copolymers (TPUSs) based on a alpha,omega-dihydroxy-[poly(epsilon-caprolactone)-b-poly(dimethylsiloxane)-b-poly(epsilon-caprolactone)] (alpha,omega-dihydroxy-PCL-PDMS-PCL) triblock. copolymer, 4,4-methylenediphenyl diisocyanate (MDI) and 1,4-butanediol (BD) was synthesized. The effects of the content (9-63 mass %) of hard urethane segments and their degree of polymerization on the properties of the segmented TPUSs were investigated. The structure, composition and hard segment degree of polymerization of the hard segments were examined using (1)H- and quantitative (13)C-NMR spectroscopy. The degree of crystallinity of the synthesized copolymers was determined using wide-angle X-ray scattering (WAXS). The surface properties were evaluated by measuring the water contact angle and water absorption. In the series of the TPUSs, the average degree of polymerization of the hard segments was varied from 1.2 to 14.4 MDI-BD units. It was found that average values from 3.8 to 14.4 MDI-BD units were effective segment lengths for crystallization of hard segments, which resulted in an increase in the degree of microphase separation of the copolymers. Spherulite-like superstructures were observed in copolymer films by scanning electron microscopy (SEM), which are believed to arise from the crystallization of the hard segments and/or PCL segments, depending on the content of the hard segments. The surface of the copolymers became more hydrophobic with increasing weight fraction of PDMS. The synthesized copolymers based on a PCL-PDMS-PCL segment showed good thermal stability, which increased with increasing content of soft PDMS segments, as was confirmed by the value of the starting temperature of thermal degradation.",
journal = "Journal of the Serbian Chemical Society",
title = "Influence of the content of hard segments on the properties of novel urethane-siloxane copolymers based on a poly(epsilon-caprolactone)-b-poly(dimethylsiloxane)-b-poly(epsilon-caprolactone) triblock copolymer",
pages = "1723-1703",
number = "12",
volume = "76",
doi = "10.2298/JSC110307146P"
}

Pergal, M. V., Antić, V. V., Ostojić, S., Marinović-Cincović, M.,& Đonlagić, J. A.. (2011). Influence of the content of hard segments on the properties of novel urethane-siloxane copolymers based on a poly(epsilon-caprolactone)-b-poly(dimethylsiloxane)-b-poly(epsilon-caprolactone) triblock copolymer. in Journal of the Serbian Chemical Society, 76(12), 1703-1723.
https://doi.org/10.2298/JSC110307146P

Pergal MV, Antić VV, Ostojić S, Marinović-Cincović M, Đonlagić JA. Influence of the content of hard segments on the properties of novel urethane-siloxane copolymers based on a poly(epsilon-caprolactone)-b-poly(dimethylsiloxane)-b-poly(epsilon-caprolactone) triblock copolymer. in Journal of the Serbian Chemical Society. 2011;76(12):1703-1723.
doi:10.2298/JSC110307146P .

Pergal, Marija V., Antić, Vesna V., Ostojić, Sanja, Marinović-Cincović, Milena, Đonlagić, Jasna A., "Influence of the content of hard segments on the properties of novel urethane-siloxane copolymers based on a poly(epsilon-caprolactone)-b-poly(dimethylsiloxane)-b-poly(epsilon-caprolactone) triblock copolymer" in Journal of the Serbian Chemical Society, 76, no. 12 (2011):1703-1723,
https://doi.org/10.2298/JSC110307146P . .