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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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

Název v anglickém jazyce

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

Popis výsledku anglicky

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

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CD - Makromolekulární chemie

OECD FORD obor

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Projekt

<a href="/cs/project/GAP108%2F12%2F1459" target="_blank" >GAP108/12/1459: Pokročilé inteligentní polymerní materiály</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2014

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Applied Polymer Science

ISSN

0021-8995

e-ISSN

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Svazek periodika

131

Číslo periodika v rámci svazku

20

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

"40899_1"-"40899_10"

Kód UT WoS článku

000340239000018

EID výsledku v databázi Scopus

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