Modification of a hyperbranched polycarbosilane with boron and its polymer-to-ceramic conversion

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	Modification of a hyperbranched polycarbosilane with boron and its polymer-to-ceramic conversion
	Zhang, ; Yang, Le ; Xu, Min-Shan ; Min, Hao ; Yu, Zhao-Ju ; Yu ZJ(余兆菊)
刊名	http://dx.doi.org/10.3969/j.issn.1001-9731.2014.04.007
	2014
关键词	Boron Ceramic materials Dendrimers Polysilanes Silicon carbide
英文摘要	A boron-modified AHPCS was prepared by chemical reactions between allylhydridopolycarbosilane (AHPCS) with dimethylamine borane (DMAB), and then cross-linking at 170°C, 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.
语种	英语
出版者	Journal of Functional Materials
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/87479]
专题	材料学院－已发表论文
推荐引用方式 GB/T 7714	Zhang,,Yang, Le,Xu, Min-Shan,et al. Modification of a hyperbranched polycarbosilane with boron and its polymer-to-ceramic conversion[J]. http://dx.doi.org/10.3969/j.issn.1001-9731.2014.04.007,2014.
APA	Zhang,,Yang, Le,Xu, Min-Shan,Min, Hao,Yu, Zhao-Ju,&余兆菊.(2014).Modification of a hyperbranched polycarbosilane with boron and its polymer-to-ceramic conversion.http://dx.doi.org/10.3969/j.issn.1001-9731.2014.04.007.
MLA	Zhang,,et al."Modification of a hyperbranched polycarbosilane with boron and its polymer-to-ceramic conversion".http://dx.doi.org/10.3969/j.issn.1001-9731.2014.04.007 (2014).