摘要
比较了制备八乙烯基聚硅倍半氧烷的三种酸性水解工艺。结果发现,两步水解法无论是从环保、节能和产率方面考虑,还是从产品提纯上考虑都是较理想的方法。通过IR、29SiNMR、1HNMR、飞行质谱及元素分析法判断,所制备的产物为八乙烯基硅倍半氧烷,与文献报道数据相吻合。产物为六面体晶体,晶胞参数为a=b=1.63nm,c=1.72nm。产物在质量损失率为5%时的温度为265.4℃,在650℃时的残余质量分数为2.8%。
The octavinyl-polyhedral oligomeric silsesquioxane was prepared by hydrolytic condensation of vinylethoxysilane (VES) as material. The structure and properties of octavinyl-polyhedral oligomeric silsesquioxane characterized by means of GPC,FT-IR,29Si NMR,1H NMR and thermal analysis. Its 5% weight loss temperature was 265.4 ℃,therefore there was 2.8% residul at 650 ℃. According to the above data,its structure was in accord with the assumed.
出处
《有机硅材料》
CAS
2007年第5期267-270,共4页
Silicone Material
关键词
乙烯基三乙氧基硅烷
八乙烯基硅倍半氧烷
飞行质谱
vinylethoxysilane,octavinyl-polyhedral oligomeric silsesquioxane,characterization
