新型SiOC陶瓷前驱体的合成及性能  

Synthesis and Properties Investigation of New Precursor for SiOC Ceramic

作　　者：吴纪全[1] 王丁[1] 王秀军[1] 李永明[1] 徐彩虹[1] 

机构地区：[1]中国科学院化学研究所,北京100190

出　　处：《宇航材料工艺》2013年第2期51-53,共3页Aerospace Materials & Technology

基　　金：国家自然科学基金(50973114);科技部(2010CB934705;2012CB933200)资助

摘　　要：采用四甲基四乙烯基环四硅氧烷(TMTVS)与四甲基环四硅氧烷(TMS)通过阳离子开环聚合反应制备了含Si—H及SiCHCH2官能团的聚硅氧烷。用红外、核磁、凝胶渗透色谱及热重分析对该聚硅氧烷进行了表征,结果表明其结构与设计相吻合,其分子量、黏度及Si—H、SiCHCH2的比例可以通过改变原料比例来调节。这种新型聚硅氧烷用作SiOC陶瓷前驱体具有低黏度、高陶瓷产率等特点。Polysiloxanes containing Si--H and Si--CH=CH2 were synthesized by cationic ring-opening poly- merization of 1,2,3,4-tetramethyl-1,2,3,4-tetravinyl cyclotetrasiloxane and 1,2,3,4-tetramethyl cyclotetrasiloxane. The polysiloxanes were characterized by fourier transfer infrared spectrometer, nuclear magnetic resonance, gel perme- ation chromatography, and hermogravimetric analyses. The results indicated the polymers have designed structure, their molecular weight, viscosities, and the ratios of Si--H to Si--CH=CH2 could be adjusted by changing the ra- tio of raw materials. The new polysiloxanes have low viscosity and high ceramic yield.

关 键 词：聚硅氧烷 陶瓷前驱体 SIOC 

分 类 号：TQ174.758[化学工程—陶瓷工业]