Effect of ultraviolet irradiation on the cross-linking process and ceramic yield of liquid hyperbranched polycarbosilane

CORC > 宁波材料技术与工程研究所 > 中国科学院宁波材料技术与工程研究所 > 2017专题

	Effect of ultraviolet irradiation on the cross-linking process and ceramic yield of liquid hyperbranched polycarbosilane
	Huang, Qing; Ji, Peng; Pei, Xueliang; Miao, Yulong; He, Liu
刊名	ADVANCES IN APPLIED CERAMICS
	2017
卷号	116 期号:8 页码:445-451
ISSN号	1743-6753
英文摘要	Liquid hyperbranched polycarbosilanes (LHBPCSs) with different reactant molar ratios of chloropropene/chloromethyltrichlorosilane were synthesised by Grignard coupling, followed by reduction. Different from traditional thermal cross-linking for LHBPCS, ultraviolet (UV) irradiation cross-linking was used. The molecular weight and hardness of LHBPCS increased with prolonging UV irradiation time. According to Fourier transform infrared result, the -Si-H, -Si-H-2 and allyl groups were consumed. Possible cross-linking reactions (hydrosilylation, allyl group polymerisation and dehydrocoupling) were discussed. The ceramic yield of LHBPCS showed an increase trend with increasing the UV irradiation time. After 1h of UV irradiation for LHBPCS-1 (the molar ratio of chloropropene to chloromethyltrichlorosilane was 1:9), 78.0wt-% ceramic yield was obtained. In addition, LHBPCS with higher allyl group content had fewer pores in it. By heating LHBPCS-1 cross-linked by UV irradiation to 1400 degrees C, a non-porous SiC ceramic was obtained.
公开日期	2017-12-25
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/14065]
专题	2017专题
推荐引用方式 GB/T 7714	Huang, Qing,Ji, Peng,Pei, Xueliang,et al. Effect of ultraviolet irradiation on the cross-linking process and ceramic yield of liquid hyperbranched polycarbosilane[J]. ADVANCES IN APPLIED CERAMICS,2017,116(8):445-451.
APA	Huang, Qing,Ji, Peng,Pei, Xueliang,Miao, Yulong,&He, Liu.(2017).Effect of ultraviolet irradiation on the cross-linking process and ceramic yield of liquid hyperbranched polycarbosilane.ADVANCES IN APPLIED CERAMICS,116(8),445-451.
MLA	Huang, Qing,et al."Effect of ultraviolet irradiation on the cross-linking process and ceramic yield of liquid hyperbranched polycarbosilane".ADVANCES IN APPLIED CERAMICS 116.8(2017):445-451.