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Enhanced Charpy impact strength of epoxy resin modified with vinyl‐terminated polydimethylsiloxane
Author(s) -
Vilčáková Jarmila,
Kutějová Lenka,
Jurča Marek,
Moučka Robert,
Vícha Robert,
Sedlačík Michal,
Kovalcik Adriana,
Machovský Michal,
Kazantseva Natalia
Publication year - 2018
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.45720
Subject(s) - materials science , polydimethylsiloxane , dynamic mechanical analysis , composite material , epoxy , toughness , diglycidyl ether , elastomer , izod impact strength test , charpy impact test , polymer , bisphenol a , ultimate tensile strength
This article deals with enhancement of the toughness of epoxy resin (ER) based on diglycidyl ether bisfenol A by either polydimethylsiloxane (PDMS) or vinyl‐terminated polydimethylsiloxane (VT‐PDMS). To improve the compatibility of these two phases, dicumylperoxide (DCP) was used as a compatibilizer. It was established that only specific composition of the components can lead to enhancement of ER toughness without significant reduction of storage modulus, T g , and interphase adhesion. The highest impact strength was recorded for ER with VT‐PDMS (10 wt %) and DCP (2 wt %) due to increased interfacial compatibility between two phases, which was proved by 1 H NMR and dielectric spectroscopy. Critical ductile brittle transition occurring between 10 and 15 wt % of rubber was observed by both morphological and dynamic mechanical analysis studies. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 45720.
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