文献类型：期刊文献

英文题名：A novel boron-silicon-alkynyl hybrid copolymer: Synthesis, characterization, heat resistance, and thermo-oxidative stabilities

作者：Zhou, Qi[1];Zhou, Quan[1];Geng, Jie[1];Ni, Li Zhong[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Special Funct Polymer Mat & Related Techn, Minist Educ, Shanghai 200237, Peoples R China

年份：2017

卷号：29

期号：3

起止页码：249

外文期刊名：HIGH PERFORMANCE POLYMERS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000398608500001)】；

基金：The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article. This study is supported by the National Natural Science Foundation (51573044) and the Shanghai Natural Science Foundation of China (15ZR1409800). The authors are grateful for the financial support from the Shanghai Postdoctoral Scientific Research FundingScheme and Special Fund of KeyResearch Base of Young Teachers of East China University of Science and Technology.

语种：英文

外文关键词：Boron-silicon-alkynyl hybrid; curing; heat resistance; precursor for ceramics

摘要：A novel boron-silicon-alkynyl hybrid copolymer (BSD) was synthesized by condensation polymerization of 1,3-diethynylbenzene with dichloromethylsilane and boron trifluoride etherate. Fourier transform infrared and H-1-, C-13-, and Si-29-nuclear magnetic resonance spectroscopies were used to confirm the structures of the copolymers. Thermogravimetric analysis and differential scanning calorimetry showed that the polymer exhibited excellent heat resistance and thermo-oxidative stabilities under nitrogen and air. The cure cross-linking reaction mechanisms of the BSD were related to Diels-Alder intermolecular cyclization involving two C C bonds and hydrosilylation reaction between Si-H and C C bonds. The T-d5 of the BSD was above 591 degrees C and 530 degrees C under nitrogen and air, respectively. The residues at 1000 degrees C were above 88% under nitrogen and 25% in air. X-ray diffraction was used to study the formation of ceramics. The precursor for ceramics (beta-SiC, alpha-SiC, and B4C) was formed at 1600 degrees C under an argon atmosphere. The thermo-oxidative stabilities of the copolymers were attributed to the existing organic groups of alkynyl and inorganic elements of silicon and boron.