含乙烯基的液态聚碳硅烷的结构与性能表征  

Synthesis and Properties of a Liquid Polycarbosilane Containing Allyl Groups

作　　者：王彦桥[1] 宋永才[1] 

机构地区：[1]国防科技大学CFC国防科技重点实验室,长沙410073

出　　处：《有机硅材料》2010年第2期85-88,共4页Silicone Material

摘　　要：以聚二甲基硅烷为原料，热分解得到液态聚碳硅烷（LPCS）；然后与四甲基四乙烯基环四硅氧烷（D4^Vi）反应，合成了液态聚碳硅烷（LPVCS）。利用FT—IR、TG、XRD等分析手段对LPVCS及其陶瓷产物的组成、结构和热稳定性进行表征。结果表明，LPVCS中含有SiH及C=C活性基团，可在250～300℃固化，300℃固化质量保留率为89．2％，对应1000℃陶瓷产率为59．0％，1200cc陶瓷产物出β-SiC微晶。Liquid polycarbosilane （LPCS） was prepared from thermal decomposition of PDMS; then the liquid polycarbosilane containing allyl groups （LPVCS） was synthesized by reacting with 2,4,6,8 - Tetravinyl -2,4,6,8 -tetramethylcyclotetrasiloxane（D4^Vi）. The chemical composition, structure and thermal stability properties of both polymer and ceramics were investigated by FT - IR, TG, XRD and other analytical tools. The results showed that LPVCS contained both Si-H and Si-Vinyl reactive groups. It could cure during 250 - 300 ℃, and the residual weight at 300℃ was 89.2%. The ceramic yield of LPVCS at 1000 ℃ in N2 atmosphere was 59.0%. β-SiC crystallite appeared in the ceramics product at 1200℃.

关 键 词：四甲基四乙烯基环四硅氧烷 聚碳硅烷 性能表征 液态 结构 聚二甲基硅烷 陶瓷产率 Β-SIC 

分 类 号：O634.41[理学—高分子化学]