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Enhanced Charpy impact strength of epoxy resin modified with vinyl-terminated polydimethylsiloxane

机译:用乙烯基封端的聚二甲基硅氧烷改性环氧树脂的夏比冲击强度

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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 H-1 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. (c) 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45720.
机译:本文涉及通过聚二甲基硅氧烷(PDMS)或乙烯基封端的聚二甲基硅氧烷(VT-PDMS)基于二甲基醚双苯酚A的环氧树脂(ER)的韧性提高环氧树脂(ER)的韧性。 为了改善这两种相的相容性,使用二氨基氧化物(DCP)作为增容剂。 建立了只有组分的特定组成可以导致ER韧性的增强,而不会显着降低储存模量,T-G和差异粘附。 由于两相之间的界面相容性增加,通过VT-PDMS(10wt%)和DCP(2wt%)记录了最高冲击强度,其具有增加的界面相容性,由H-1 NMR和介电光谱证实。 通过形态和动态机械分析研究,观察到临界延性脆性转变发生在10和15wt%的橡胶之间。 (c)2017 Wiley期刊,Inc.J.Phill。 聚合物。 SCI。 2018,135,45720。

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