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Synthesis and swelling behavior of polyurethane networks based on hyperbranched polymer
dc.creator | Džunuzović, Jasna V. | |
dc.creator | Pergal, Marija V. | |
dc.creator | Jovanović, Slobodan | |
dc.creator | Vodnik, Vesna | |
dc.date.accessioned | 2018-03-01T22:22:47Z | |
dc.date.accessioned | 2023-01-26T13:05:56Z | |
dc.date.available | 2018-03-01T22:22:47Z | |
dc.date.available | 2023-01-26T13:05:56Z | |
dc.date.issued | 2011 | |
dc.identifier.issn | 0367-598X | |
dc.identifier.uri | http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5659 | |
dc.description.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. | en |
dc.relation | info:eu-repo/grantAgreement/MESTD/Basic Research (BR or ON)/172062/RS// | |
dc.rights | openAccess | en |
dc.rights.uri | https://creativecommons.org/licenses/by-nc-nd/4.0/ | |
dc.source | Hemijska industrija | en |
dc.subject | polyurethane | en |
dc.subject | hyperbranched polyester | en |
dc.subject | poly(dimethylsiloxane) | en |
dc.subject | swelling behavior | en |
dc.title | Synthesis and swelling behavior of polyurethane networks based on hyperbranched polymer | en |
dc.type | article | en |
dc.rights.license | BY-NC-ND | |
dc.citation.epage | 644 | |
dc.citation.issue | 6 | |
dc.citation.rank | M23 | |
dc.citation.spage | 637 | |
dc.citation.volume | 65 | |
dc.identifier.doi | 10.2298/HEMIND110902071D | |
dc.identifier.fulltext | http://TechnoRep.tmf.bg.ac.rs/bitstream/id/14879/0367-598X1100071D.pdf | |
dc.identifier.scopus | 2-s2.0-84855262565 | |
dc.identifier.wos | 000302108800002 | |
dc.type.version | publishedVersion |