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	超支化聚碳硅烷的掺硼改性与陶瓷化研究; Modification of a hyperbranched polycarbosilane with boron and its polymer-to-ceramic conversion
	张佩 ; 杨乐 ; 徐敏珊 ; 闵浩 ; 余兆菊
	2014-02-28
关键词	二甲基胺硼烷 烯丙基超支化聚碳硅烷 先驱体 陶瓷化 dimethylamine borane(DMAB) allylhydridropolycarbosilane(AHPCS) precursor polymer-to-ceramic conversion
英文摘要	通过二甲基胺硼烷(dMAb)与烯丙基超支化聚碳硅烷(AHPCS)反应合成含硼聚碳硅烷先驱体,后经170℃热交联及高温裂解制备出碳化硅陶瓷。采用傅立叶红外光谱、热重分析、X射线衍射分析及扫描电子显微镜对上述过程进行研究。结果表明,dMAb中的b—H键可分别与AHPCS中的CC键及SI—H键发生硼氢化反应和脱氢偶合反应,从而促进AHPCS的热交联,并显著提高陶瓷产率。此外,硼的引入还可有效抑制β-SIC在高温下的结晶。; A boron-modified AHPCS was prepared by chemical reactions between allylhydridopolycarbosilane( AHPCS)with dimethylamine borane( DMAB),and then cross-linking at 170 ℃,followed by pyrolyzing at high temperatures to afford SiC-based ceramics.The cross-linking and polymer-to-ceramic conversion of the boron-modified AHPCS were characterized by FT-IR,TGA,XRD and SEM.The results indicate that the cross-linking of AHPCS was improved,involving hydroboration reaction between vinyl groups of AHPCS and B—H groups of DMAB,and dehydrocoupling reaction between Si—H groups of AHPCS and B—H groups of DMAB.As a result,the ceramic yield of the B-modified AHPCS was significantly enhanced.Moreover,the introduction of boron inhibits the crystallization of β-SiC at high temperatures obviously.; 国家自然科学基金资助项目(50802079); 福建省自然科学基金资助项目(2011J01330)
语种	zh_CN
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/98455]
专题	材料学院－已发表论文
推荐引用方式 GB/T 7714	张佩,杨乐,徐敏珊,等. 超支化聚碳硅烷的掺硼改性与陶瓷化研究, Modification of a hyperbranched polycarbosilane with boron and its polymer-to-ceramic conversion[J],2014.
APA	张佩,杨乐,徐敏珊,闵浩,&余兆菊.(2014).超支化聚碳硅烷的掺硼改性与陶瓷化研究..
MLA	张佩,et al."超支化聚碳硅烷的掺硼改性与陶瓷化研究".(2014).

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