文献类型：期刊文献

英文题名：Effect of side groups on the properties of silicon-containing arylacetylene resins

作者：Liu, Xiaotian[1];Ma, Manping[1];Li, Chuan[1];Tang, Junkun[1];Yuan, Qiaolong[1];Huang, Farong[1]

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

年份：2022

卷号：62

期号：3

起止页码：793

外文期刊名：POLYMER ENGINEERING AND SCIENCE

收录：;EI(收录号：20220311473297);WOS:【SCI-EXPANDED(收录号:WOS:000743197000001)】；

基金：Central University Basic Research Fund of China, Grant/Award Number: JKD 01211611

语种：英文

外文关键词：effect of side groups; high-performance resins; silicon-containing arylacetylene resin; structure-properties relationships

摘要：Four silicon-containing arylacetylene resins were synthesized by polycondensation of Grignard reagent of m-diethynylbenzene with methylethyldichlorosilane, dimethyldichlorosilane, methylphenyldichlorosilane, and diphenyldichlorosilane, respectively. The structures of the resins were verified by nuclear magnetic resonance spectroscopy and Fourier transform infrared (FTIR) spectroscopy. The solubility, crystallinity, and rheological character of the resins were characterized. The curing behavior was traced by differential scanning calorimetry (DSC) and FTIR analyses. The effect of the side groups on the silicon atom on the properties was investigated. The results show that the resins with asymmetrical side groups display better processability (wide processing window) as compared with those with symmetrical side groups. The resin with side phenyl groups shows higher flexural strength but lower thermal stability as compared with those without side phenyl groups. Meanwhile, the side phenyl groups also enhance the temperature at which secondary relaxation occurs.