Abstract: With the polycondensates of methyltrimethoxysilane（MTMS）as film forming materials，the silica sol［hydrolysis products of tetraethylorthosilicate（TEOS）］surface-modified by 3-（methacryloxypropyl）-trimethoxysilane（MEMO）as an inorganic reinforcing material，the transparent organic-inorganic hybrid film on polycarbonate（PC）was prepared by the co-condensation reaction between hydroxy groups.The effects of the silica sol modified by MEMO on the properties and structure of the hybrid films were studied with TG/DTA，FTIR，UV-vis and metallographic microscope.The results showed that the cross-linked inorganic structure end-capped with organic groups formed on PC by the co-condensation reaction between hydrolysis products of MTMS and TEOS，whose base backbone was Si—O—Si network structure.At 150—250℃，thermally-initiated polymerization of C =C was observed and the hybrid film became more flexible with increase of MEMO.The film increased the transparency of PC while MEMO modification had little effect on its transparency.The film can obviously improve the hardness of PC，and the addition of MEMO can increase the thickness of film and make the film less liable to crack.

摘要： 以甲基三甲氧基硅烷（MTMS）水解聚合产物作为主要成膜物质，经甲基丙烯酰氧基丙基三甲氧基硅烷（MEMO）表面改性的正硅酸乙酯（TEOS）水解产物硅胶作为无机增强物，利用两者羟基之间的共缩聚反应在聚碳酸酯（PC）板表面制备有机/无机复合透明耐磨薄膜;采用TG/DTA、FTIR、UV-vis、金相显微镜及SEM等测试手段对不同含量MEMO改性硅胶对薄膜结构及性能的影响进行表征.研究结果表明，MTMS和TEOS的水解聚合产物通过共缩聚反应在PC板表面形成带有机基团的无机交联网络结构，基本骨架由Si—O—Si组成;在150～250℃之间，MEMO所带的C=C会发生热引发自由基聚合反应;随MEMO含量的增加，薄膜的柔韧性提高;薄膜对PC板有一定的增透作用，MEMO含量的改变对其增透性能影响不大;薄膜能显著提高PC板的硬度，随着MEMO含量的增加，能制备厚膜而不易开裂.