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通过聚甲基三乙氧基硅烷(PTS)与环氧丙氧丙基三甲氧基硅烷缩合产物对线型酚醛树脂进行接枝改性,并将其改性产物用于固化环氧树脂。通过制备一系列不同比例改性酚醛树脂并分别与环氧树脂固化。所得的环氧固化产物进行冲击强度、玻璃化转变温度、热失重等测试,结果表明,改性固化产物比未改性固化产物玻璃化转变温度提高了约30℃,冲击强度最高提高了36.6%,高温热稳定性也显著增强。改性产物实现了热稳定性和韧性的综合提升。
The phenolic novolac resins are graft modified with polymethyltriethoxysilane (PTS) and glycidoxypropyltrimethoxysilane condensation products and their modified products are used to cure the epoxy resin. By preparing a series of different proportions of modified phenolic resin and respectively curing with epoxy resin. The obtained epoxy cured product was tested for impact strength, glass transition temperature and weight loss. The results showed that the glass transition temperature of the modified product was about 30 ℃ higher than that of the unmodified product, and the highest impact strength was 36.6% , High temperature thermal stability is also significantly enhanced. Modified products to achieve the comprehensive improvement of thermal stability and toughness.