文献类型：期刊文献

英文题名：Synthesis and Characterization of Block Copolymers of Poly(silylene diethynylbenzen) and Poly(silylene dipropargyl aryl ether)

作者：Gao, Man[1];Shang, Chengyuan[2];Li, Jixian[1];Han, Gang[1];Tang, Junkun[1];Yuan, Qiaolong[1];Huang, Farong[1]

机构：[1]East China Univ Sci & Technol, Key Lab Specially Funct Polymer Mat & Related Tec, Minist Educ, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China;[2]Aerosp Res Inst Mat & Proc Technol, Res & Applicat Ctr Struct Composites, Beijing 100076, Peoples R China

年份：2021

卷号：13

期号：9

外文期刊名：POLYMERS

收录：;EI(收录号：20212110392688);WOS:【SCI-EXPANDED(收录号:WOS:000650711300001)】；

基金：This work was supported by the Fundamental Research Funds for the Central Universities (No. 50321042117001).

语种：英文

外文关键词：poly(silylene diethynylbenzen)– b– poly(silylene dipropargyl aryl ether); three-block copolymer; silicon-containing arylacetylene resin; high-performance resin matrix for composites

摘要：Poly(silylene diethynylbenzene)-b-poly(silylene dipropargyloxy diphenyl propane) copolymer (ABA-A), poly(silylene diethynylbenzene)-b-poly(silylene dipropargyloxy diphenyl ether) copolymer (ABA-O), and a contrast poly(silylene diethynylbenzene) with equivalent polymerization degree were synthesized through Grignard reactions. The structures and properties of the copolymers were investigated via hydrogen nuclear magnetic resonance, Fourier transform infrared spectroscopy, Haake torque rheometer, differential scanning calorimetry, dynamic mechanical analysis, thermogravimetric analysis and mechanical tests. The results show that the block copolymers possess comprehensive properties, especially good processability and good mechanical properties. The processing windows of these copolymers are wider than 58 degrees C. The flexural strength of the cured ABA-A copolymer reaches as high as 40.2 MPa. The degradation temperatures at 5% weight loss (T-d5) of the cured copolymers in nitrogen are all above 560 degrees C.