Study of the properties of urethane-siloxane copolymers based on poly(propylene oxide)-b-poly(dimethylsiloxane)-b-poly(propylene oxide) soft segments

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F16%3A00459279" target="_blank" >RIV/61389013:_____/16:00459279 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1021/acs.iecr.5b04975" target="_blank" >http://dx.doi.org/10.1021/acs.iecr.5b04975</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acs.iecr.5b04975" target="_blank" >10.1021/acs.iecr.5b04975</a>

Result language
angličtina
Original language name
Study of the properties of urethane-siloxane copolymers based on poly(propylene oxide)-b-poly(dimethylsiloxane)-b-poly(propylene oxide) soft segments
Original language description
Segmented polyurethanes (PURs) were prepared from α,ω-dihydroxypoly(propylene oxide)-b-poly(dimethylsiloxane)-b-poly(propylene oxide) (PPO–PDMS) as the soft segment and 4,4-diphenylmethane diisocyanate and 1,4-butanediol as the hard segment, via two-step polyaddition process in solvent mixture. The content of hard segments is in the range from 10 to 60 wt %. The structure and composition of PURs are determined by 1H NMR, 13C NMR, and ATR-FTIR spectroscopy. Incorporation of PPO–PDMS leads to improvements in thermal stability. Small- and wide-angle X-ray scattering experiments indicate that synthesized PURs with higher content of hard segments have more developed and distinct phase separated morphologies. Dynamic mechanical thermal analysis shows that copolymers have multiple transitions, characteristic for phase-separated systems. The water contact angle increases while water absorption decreases with increasing content of PPO–PDMS segments. The PURs prepared in this work show good thermal, mechanical features with phase separated morphology and high water resistance that enable their widespread application.
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/GA13-06700S" target="_blank" >GA13-06700S: Multifunctional highly elastic polymeric materials with controlled biodegradability</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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