环氧树脂
缩水甘油醚
二恶烷
没食子酸
异佛尔酮
热固性聚合物
表面改性
材料科学
有机化学
双酚A
化学
高分子化学
聚合物
烯丙基重排
二胺
催化作用
抗氧化剂
物理化学
作者
Chahinaz Aouf,Hélène Nouailhas,Maxence Fache,Sylvain Caillol,Bernard Boutevin,Hélène Fulcrand
标识
DOI:10.1016/j.eurpolymj.2012.11.025
摘要
Novel biobased epoxy thermoset was synthesized from gallic acid, a phenolic acid encountered in various plants, both in its simple form and as a part of gallotannins. The functionalization of gallic acid was carried out using a two-step synthesis involving the allylation of OH groups followed by the epoxidation of resulting double bonds. The performance of two oxygen transfer agents (meta-chloroperbenzoic acid (mCPBA) and methyl(trifluoromethyl) dioxirane generated in situ from 1,1,1-trifluoroacetone and oxone) was evaluated in the epoxidation of the allylic double bonds. The glycidyl derivative of gallic acid (GEGA) obtained from mCPBA epoxidation was cured in epoxy polymer formulation with isophorone diamine (IPDA). The thermal and mechanical preliminary analyses showed that this new epoxy network based on GEGA displayed interesting properties compared to the epoxy polymer formulated with commercial diglycidyl ether of bisphenol A (DGEBA). A higher glass-transition temperature of GEGA/IPDA epoxy resin indicates a higher crosslinking density of this network.
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