文献类型：期刊文献

英文题名：Highly heat resistant and thermo-oxidatively stable borosilane alkynyl hybrid polymers

作者：Zhou, Hua[1];Zhou, Quan[1];Zhou, Qi[1];Ni, Lizhong[1];Chen, Qi[1]

机构：[1]E 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：2015

卷号：5

期号：16

起止页码：12161

外文期刊名：RSC ADVANCES

收录：;EI(收录号：20150600496254);WOS:【SCI-EXPANDED(收录号:WOS:000348985400060)】；

基金：The research in this paper was supported by the National Natural Science Foundation of China (51073053), China Postdoctoral Science Foundation (2013M541486), The Shanghai Natural Science Foundation (15ZR1409800) and Shanghai Postdoctoral Scientific Program.

语种：英文

外文关键词：Crosslinking - Fluorine compounds - Differential scanning calorimetry - Gel permeation chromatography - Hydrosilylation - Heat resistance - Oxidation resistance - Silicon compounds

摘要：A type of boron-silicon containing hybrid polymer with C equivalent to C units (HBS) was prepared, and the effects of three different substituents on the properties of the polymers were studied. The polymers were synthesized with ethynylmagnesium bromide, dichlorosilane and boron fluoride etherate by using a Grignard reagent method. The structures of HBS were characterized by Fourier-transform infrared spectra, proton-NMR (H-1-NMR), C-13-NMR, Si-29-NMR, and gel permeation chromatography. Thermal and oxidative stabilities were studied using differential scanning calorimetry and thermogravimetry analysis, and the crosslinking reaction mechanisms of the HBS are discussed. All the polymers exhibit excellent thermal and oxidation resistance, particularly, HBS-1 with Si-H bonds which was highly heat resistant and showed good thermo-oxidative stability. The temperatures of 5% weight loss (T-d5) were 624 degrees C and 607 degrees C in nitrogen and air, respectively, and the residues at 1000 degrees C were 86.8% and 77.5%, respectively. The thermal and oxidative stabilities of the polymers were attributed to the synergistic effect of boron and silicon elements and the cross linking during hydrosilylation and Diels-Alder reactions.