Accelerating the crosslinking process of hyperbranched polycarbosilane by UV irradiation

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	Accelerating the crosslinking process of hyperbranched polycarbosilane by UV irradiation
	Zhong, Xiqiang; Pei, Xueliang; Miao, Yulong; He, Liu; Huang, Qing
刊名	JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
	2017
卷号	37 期号:10 页码:3263-3270
ISSN号	0955-2219
英文摘要	A liquid hyperbranched polycarbosilane (LHBPCS) with stoichiometric C/Si ratio but without unsaturated groups was synthesized. Different from traditional thermal crosslinking, ultraviolet (UV) irradiation crosslinking was taken. The molecular weight, the consumption of -Si-H group and ceramic yield of LHBPCS showed an increase trend with increasing the UV irradiation time. After 30 min of UV irradiation, 71.8 wt% ceramic yield was obtained. In addition, extra divinyldimethylsilane was added into LHBPCS. Under UV irradiation, both the -Si-H group and vinyl group of divinyldimethylsilane were consumed. But the reaction extend of vinyl group was much faster than that of -Si-H group. Compared with pure LHBPCS, the mixture of LHBPCS and 5 wt% divinyldimethylsilane gave a higher ceramic yield of 79 wt% after 30 min of UV irradiation. By heating the crosslinked LHBPCS to 1000 degrees C, a near stoichiometric SiC ceramic was got. It exhibited excellent thermal stability at 1400 degrees C in air. (C) 2017 Elsevier Ltd. All rights reserved.
公开日期	2017-12-25
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/13700]
专题	2017专题
推荐引用方式 GB/T 7714	Zhong, Xiqiang,Pei, Xueliang,Miao, Yulong,et al. Accelerating the crosslinking process of hyperbranched polycarbosilane by UV irradiation[J]. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,2017,37(10):3263-3270.
APA	Zhong, Xiqiang,Pei, Xueliang,Miao, Yulong,He, Liu,&Huang, Qing.(2017).Accelerating the crosslinking process of hyperbranched polycarbosilane by UV irradiation.JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,37(10),3263-3270.
MLA	Zhong, Xiqiang,et al."Accelerating the crosslinking process of hyperbranched polycarbosilane by UV irradiation".JOURNAL OF THE EUROPEAN CERAMIC SOCIETY 37.10(2017):3263-3270.