PMMA/SiO_2透明块体材料的制备及其热性能  

Preparation and Thermal Properties of Transparent PMMA/SiO_2 Hybrid Bulk Materials

作　　者：毕于铁[1,2] 任洪波[2] 张林[2] 王鲜[1,2] 尚承伟[2] 

机构地区：[1]西南科技大学材料科学与工程学院 [2]中国工程物理研究院激光聚变研究中心,绵阳621900

出　　处：《应用化学》2009年第10期1244-1246,共3页Chinese Journal of Applied Chemistry

基　　金：国家"八六三"计划(2007AA804128)资助项目

摘　　要：以正硅酸乙酯为前驱体,采用无溶剂水解技术,制备出了均一、稳定、透明的SiO2溶胶,通过透射电子显微镜分析,粒径在100nm左右;在溶胶中加入甲基丙烯酸甲酯(MMA)和偶氮二异丁腈(AIBN),采用热固化制备了透明的块体PMMA/SiO2杂化材料,通过差热(DSC)和热重分析(TGA)研究了杂化材料的热性能。DSC结果表明,当体系中的SiO2质量分数超过20%时,杂化材料无明显的玻璃化转变现象。TGA结果表明,杂化材料的分解温度提高约110℃。透射电子显微镜观察结果表明,无机相均匀分散在有机相中,两相之间没有明显的相分离现象。Silicon dioxide sol was synthesized from inorganic salt precursor, tetraethylorthosilioate by hydrolysis and condensation in water. The thermal stabilities and micro-structure of PMMA/SiO2 hybrid materials were characterized with TEM, DSC and TG. The studies reveal that the diameter of the particles was about 100 nm. The glass transition temperature of the PMMA/SiO2 hybrid materials disappeared when w（ SiO2 ） was more than 20% , and the thermal decomposition temperature increased by 110℃. The forming of homogeneous inter-penetrated network between the organic phase and the inorganic phase demonstrated the miscibility of the two species had been improved.

关 键 词：有机-无机杂化材料 SIO2溶胶 甲基丙烯酸甲酯 正硅酸乙酯 

分 类 号：O632[理学—高分子化学]