High-Tg, heat resistant epoxy-silica hybrids with a low content of silica generated by nonaqueous sol-gel process

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F14%3A00431458" target="_blank" >RIV/61389013:_____/14:00431458 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1002/app.40899" target="_blank" >http://dx.doi.org/10.1002/app.40899</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/app.40899" target="_blank" >10.1002/app.40899</a>

Result language
angličtina
Original language name
High-Tg, heat resistant epoxy-silica hybrids with a low content of silica generated by nonaqueous sol-gel process
Original language description
The epoxy-silica hybrids showing high Tg and thermal stability are prepared by the non-aqueous sol?gel process initiated with borontriflouride monoethylamine. Tetramethoxysilane (TMOS) is used as a precursor of silica and 3-glycidyloxypropyl trimethoxysilane as a coupling agent to strengthen the interphase interaction with an epoxy matrix. The basic factors governing the nonaqueous sol?gel process are studied in order to reveal the formation?structure?properties relationships and to optimize the hybridcomposition as well as conditions of the nonaqueous synthesis. The formation of the hybrid, its structure, thermomechanical properties and thermal stability are followed by chemorheology experiments, NMR, DMA and TGA. The most efficient reinforcement ofthe epoxy network is achieved by the combination of both alkoxysilanes, showing synergy effects. The hybrids with a low content (10 wt %) of the in situ generated silica exhibit dramatic increase in Tg and the high modulus, 335 MPa, up to
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%2F12%2F1459" target="_blank" >GAP108/12/1459: Advanced smart polymer materials</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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