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以γ-(2,3-环氧丙氧)丙基三甲氧基硅烷(GPTS)、酸催化剂和混合溶剂等为原料,采用水解-缩合法合成了含环氧基的硅氧烷杂化树脂。以黏度和环氧值为衡量指标,采用单因素试验法优选出制备该杂化树脂的较佳工艺条件,并对其热性能进行了表征。结果表明:在酸性介质中,当n(GPTS)∶n(水)∶n(酸催化剂)∶n(溶剂)=1∶3.0∶0.5∶7.7时,GPTS经水解、缩合反应后,可以获得黏度为1 270～1 320 mPa.s、环氧值为0.183的硅氧烷杂化树脂;该杂化树脂的起始分解温度为270.1℃,800℃时的残炭率(43.0%)相对较高,说明其热稳定性较好。
Epoxy-based siloxane hybrid resin was synthesized by hydrolysis-condensation method using γ- (2,3-epoxypropoxy) propyltrimethoxysilane (GPTS), acid catalyst and mixed solvent as raw materials . Taking the viscosity and the epoxy value as the indexes, the optimum technological conditions for preparing the hybrid resin were optimized by the single factor test method, and its thermal properties were characterized. The results showed that when GPTS: n (water): n (acid catalyst): n (solvent) = 1: 3.0: 0.5: 7.7 in acid medium, the GPTS was hydrolyzed and condensed to obtain the viscosity Was 1 270 ~ 1 320 mPa.s, the epoxy value was 0.183. The initial decomposition temperature of the hybrid resin was 270.1 ℃, and the carbon residue rate (43.0%) was relatively high at 800 ℃ , Indicating that its thermal stability is better.