Crosslinked polyurethanes based on hyperbranched polymers
2008; Association of Chemical Engineers of Serbia; Volume: 62; Issue: 6 Linguagem: Inglês
10.2298/hemind0806353v
ISSN2217-7426
AutoresJasna Vuković, Marija V. Pergal, Slobodan Jovanović, Vesna Vodnik,
Tópico(s)Polymer composites and self-healing
ResumoIn this paper, two samples of polyurethane (PU) crosslinked with hydroxy -functonal hyperbranched aliphatic polyester of the second pseudo generation were investigated. For the synthesis of these crosslinked PUs two different macrodiols were used: poly(tetramethyleneoxide) (PTMO) for PUPTMO and ethylene oxide-poly(dimethylsiloxane)-ethylene oxide (PDMS-EO) for PUPDMS-EO sample. Synthesized samples behave as elastomers and have yellow color. Obtained results show that swelling degree of the sample PUPDMS-EO in N-methyl-2-pyrrolidinon (NMP) determined at room temperature is higher than for the sample PUPTMO. It has been also observed that thermal properties of these polyurethane networks can be changed by incorporation of siloxane sequences in their structure.
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