Studies of the thermal and mechanical properties of poly(urethane-siloxane)s cross-linked by hyperbranched polyesters

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F12%3A00380375" target="_blank" >RIV/61389013:_____/12:00380375 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1021/ie300927z" target="_blank" >http://dx.doi.org/10.1021/ie300927z</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/ie300927z" target="_blank" >10.1021/ie300927z</a>

Result language
angličtina
Original language name
Studies of the thermal and mechanical properties of poly(urethane-siloxane)s cross-linked by hyperbranched polyesters
Original language description
Polyurethane networks based on Boltorn hyperbranched polyesters (HBPs) of different pseudogenerations as cross-linkers, ?,?-dihydroxy(ethylene oxidepoly(dimethylsiloxane)ethylene oxide) (EOPDMSEO) and 4,4´-methylenediphenyl diisocyanate were synthesizedusing 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 EOPDMSEO 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 pseudogener
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CD - Macromolecular chemistry
OECD FORD branch
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Project
<a href="/en/project/GAP108%2F10%2F0195" target="_blank" >GAP108/10/0195: Novel multicomponent polyurethanes ? synthesis, characterization</a><br>
Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2012
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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