摘要
采用溶胶 -凝胶技术 ,以硅酸钠为原料制备聚硅酸 /四氢呋喃溶胶 ,再与甲基丙烯酸甲酯 (MMA)及少许偶联剂 (甲基丙烯酰氧丙基三甲氧基硅烷 (MPTMS) )混合 ,经聚合、缩合和溶胶 -凝胶过程制备了有机 /无机两相间有— C—Si—O—键的杂化材料——聚甲基丙烯酸甲酯 /二氧化硅 (PMMA/Si O2 )。用红外光谱、透射电镜分析了杂化材料的结构 ;用 TGA和 DSC测试了材料的热性能及体系中 Si O2 含量对材料性能的影响。结果表明 ,制备的 PMMA/Si O2 杂化材料中 ,有机 /无机两相间的相容性好 ,不产生相分离 ,材料透明 ,透光率可达 80 %左右 ,且杂化材料的热稳定和玻璃化转变温度 (Tg)都比纯
Poly(silicic acid) was obtained by the hydrolysis of sodium silicate in hydrochloric acid. Poly(methyl methacrylate) silica hybrids were prepared through polymerization, condensation and sol gel processes of the mixture of methyl methacrylate, poly(silicic acid) and a small amount of coupling agent methacryloxylpropyl trimethoxy siliane in tetrahydrofuran. FTIR, SEM and TEM investigations on the structure of the hybrids showed that there are -C-Si-O- covalent bonds between organic and inorganic moieties in the hybrids. The TGA and DSC analyses revealed the good compatibility between the inorganic and organic moieties and no phase separation was observed. The hybrids have transparency nearly 80% with thermal resistance and glass temperature much higher than that of pure PMMA.
出处
《应用化学》
CAS
CSCD
北大核心
2002年第9期874-877,共4页
Chinese Journal of Applied Chemistry
基金
教育部骨干教师资助计划项目 (2 0 0 0年度 )
