One-pot synthesis and characterization of a new, branched polycarbosilane bearing allyl groups  

作　　者：Tian Hua Huang Zhao Ju Yu Xu Min He Mu He Huang Li Fu Chen Hai Ping Xia  Li Tong Zhang 

机构地区：[1]Advanced Materials Laboratory, Department of Materials Science & Engineering, College of Chemistry & Chemical Engineering, Xiamen University, Xiamen 361005, China

出　　处：《Chinese Chemical Letters》2007年第6期754-757,共4页中国化学快报（英文版）

摘　　要：A highly branched polycarbosilane bearing allyl groups has been prepared by a one-pot synthesis with chloromethyltrichlorosilane, chloromethylmethyldichlorosilane and allyl chloride as the starting materials. The resultant polymer, with the approximate formula [SiH1.2(CH3)0.71(CH2CHCH2)0.09CH2]n, has been characterized by 1H, 13C, and 29Si NMR, GPC, TG and elemental analysis. It could be cross-linked thermally at 170 °C in the absence of oxygen. Pyrolysis of the polymer gave a ceramic with a yield of about 70%.A highly branched polycarbosilane bearing allyl groups has been prepared by a one-pot synthesis with chloromethyltrichlorosilane, chloromethylmethyldichlorosilane and allyl chloride as the starting materials. The resultant polymer, with the approximate formula [SiH1.2(CH3)0.71(CH2CHCH2)0.09CH2]n, has been characterized by 1H, 13C, and 29Si NMR, GPC, TG and elemental analysis. It could be cross-linked thermally at 170 °C in the absence of oxygen. Pyrolysis of the polymer gave a ceramic with a yield of about 70%.

关 键 词：POLYCARBOSILANE One-pot synthesis Silicon carbide precursor Ceramic precursor 

分 类 号：O634.41[理学—高分子化学]