文献类型：期刊文献

英文题名：Curing reactions of liquid hydridopolycarbosilanes with vinyl or allyl groups

作者：Qian, Binjie[1];Cao, Biwen[2];Chu, Mingyu[1];Li, Yubing[1];Ma, Hanyu[1];Guo, Rongye[1];Wan, Liqiang[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Specially Funct Polymer Mat & Related Tech, Minist Educ, Shanghai, Peoples R China;[2]Xian Aerosp Composite Mat Inst, Xian, Peoples R China

年份：2023

卷号：140

期号：42

外文期刊名：JOURNAL OF APPLIED POLYMER SCIENCE

收录：;EI(收录号：20233414584561);WOS:【SCI-EXPANDED(收录号:WOS:001049166200001)】；

基金：ACKNOWLEDGMENTS The authors gratefully acknowledge the Fundamental Research Funds for the Central Universities (Grand no. JKD01231701) for the funding support.

语种：英文

外文关键词：catalyst; curing reaction; initiator; liquid hydridopolycarbosilane

摘要：Liquid hydridopolycarbosilanes (LHPCS) with vinyl or allyl groups have attracted significant research interest due to their low curing temperature and high ceramic yield. In this study, allyl-terminated hydridopolycarbosilane (AHPCS) and vinyl-terminated hydridopolycarbosilane (VHPCS) were prepared by the Grignard coupling reaction and characterized by NMR and Fourier infrared spectroscopy (FTIR). And the curing reactions of AHPCS and VHPCS with or without initiators (dicumyl peroxide [DCP], tert-Butyl peroxybenzoate [TBPB]) or Karstedt catalyst were investigated using differential scanning calorimetry and in-situ FTIR. The main curing reactions of VHPCS and AHPCS are the double bond free radical polymerization and hydrosilylation reaction, respectively. The addition of initiators and Karstedt catalyst could promote the corresponding curing reaction and increase the weight residual at 1000 & DEG;C. The thermal properties of the cured resins were investigated by thermogravimetric analysis. The addition of initiators and catalyst could significantly increase the weight residual of VHPCS and AHPCS, respectively. The addition of the Karstedt catalyst increased the weight residual of AHPCS from 75.6% to 83.1%. In addition, the addition of TBPB and DCP increased the weight residual of VHPCS from 74.2% to 81.2% and 80.2%, respectively.