中文摘要：

同步采用无皂乳液聚合法和溶胶-凝胶法制备了聚丙烯酸酯／纳米SiO2复合材料，通过TEM、力学性能、DSC、TG和XRD等检测手段研究了不同有机硅烷偶联剂对聚丙烯酸酯／纳米SiO2复合材料性能的影响。结果表明，分别采用3-甲基丙烯酸氧丙基三甲氧基硅烷（MEMO）和乙烯基三甲氧基硅烷（VT—MO）制备的纳米复合材料，力学性能随其用量的增加而同步增强增韧；TEM结果表明，采用MEMO和VTM0制备的聚丙烯酸酯／纳米SiO2复合材料中的纳米SiO2的粒径约20nm，且分布均匀；热性能结果表明，采用乙烯基三乙氧基硅烷（VTEO）制备的纳米复合材料的玻璃化温度（-8．1℃）和热裂解温度（350℃）最高；XRD结果表明，有机硅烷偶联剂的加入降低了纳米复合材料的结晶度。

英文摘要：

Polyacrylate/nano-SiO2 composite materials were prepared via sol-gel process and emulsifier-free emulsion polymerization. The properties of polyacrylate/nano-SiO2 composite with different silane coupling agents were studied by Transmission Electron microscopy （TEM）,mechanical properties test,differential scanning calorimeters （DSC）,thermal gravity analysis（TG） and X-Ray diffraction（XRD）. TEM represented that nano-SiO2 of 20nm dispersed evenly in polyacrylate/nano-SiO2 latex particles with the presence of MEMO and VTMO. The tensile strength and elongation at break of nanocomposites with the incorporation of 3-methacryloxypropyltrime- thoxysilane （MEMO） and vinyltrimethoxysilicane （VTMO） increase with the use level of these silane coupling agents. Thermal properties showed that the glass transition temperature（-8.1℃） and thermal decomposition temperature（350℃） of polyacrylate/nano-SiO2 composite with vinyltriethoxysilane （VTEO） are highest. XRD demonstrated that the addition of silane coupling agent decreased the crystal degree of nanocomposite.