NIMTE OpenIR  > 2017专题
Effect of ultraviolet irradiation on the cross-linking process and ceramic yield of liquid hyperbranched polycarbosilane
Ji, Peng; Pei, Xueliang; Miao, Yulong; He, Liu; Huang, Qing
2017
Source PublicationADVANCES IN APPLIED CERAMICS
ISSN1743-6753
Volume116Issue:8Pages:445-451
AbstractLiquid 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.
Document Type期刊论文
Identifierhttp://ir.nimte.ac.cn/handle/174433/14065
Collection2017专题
Recommended Citation
GB/T 7714
Ji, Peng,Pei, Xueliang,Miao, Yulong,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 Ji, Peng,Pei, Xueliang,Miao, Yulong,He, Liu,&Huang, Qing.(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 Ji, Peng,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.
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