利用γ-环氧丙氧基三甲氧基硅烷与磷酸合成了一种含磷硅烷偶联剂,将其与正硅酸乙酯和甲基三乙氧基硅烷反应得到一种硅磷杂化物（HSP）。将HSP加入到双酚A型环氧树脂,以4,4′-二氨基二苯基甲烷为固化剂制备了一种含有硅磷杂化物的环氧树脂固化物。对此固化物的玻璃化转变温度（Tg）、热降解性能和极限氧指数（LOI）进行了测试。结果显示,该固化物的热性能与阻燃性能得到明显改善。当HSP含量占环氧树脂用量的30%时,与纯环氧树脂固化物相比,Tg提高了5℃,700℃残炭率提高了68.4%,LOI达到27.2,获得了明显的阻燃和提高热稳定性等效果。
A kind of hybrid of silicon-phosphorus was synthesized by the hydrolysis and polycondensation reaction of tetraethoxysilane,methyltriethoxysilane and phosphorus-containing silicon coupling agent which was synthesized by γ-glycidoxypropyl trimethoxysilane and phosphoric acid.A cured epoxy resin containing hybrid of silicon-phosphorus was prepared via the in situ curing of the bisphenol-A type epoxy resin and 4,4′-diaminodiphenylmethane with the hybrid of silicon-phosphorus.Thermogravimetric analysis,determinations of differential scanning calorimetry and limited oxygen index were carried out to characterize the cured products.It is found that the flame ratardance and thermal property of the cured epoxy resin is remarkablely improved.The limiting oxygen index（LOI） is 27.2,the residual char yield under 700 ℃ and Tg are higher than those of the pure epoxy resin 68.4% and 5 ℃,respectively,when 30% of the hybrid is doped into epoxy resin.This indicates that the cured epoxy resin possesses better flame retardancy and thermal stability.
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