文献类型：期刊文献

英文题名：Synthesis and thermal stability of a novel acetylene end-capped silicon-containing polyimide coupling agent with a silane pendant group

作者：Yang, Teng[1];Hu, Yanhong[1];Deng, Shifeng[1];Du, Lei[1];Zhou, Jiali[1];Hu, Junjie[1];Jian, Xue[1]

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

年份：2019

卷号：31

期号：9-10

起止页码：1259

外文期刊名：HIGH PERFORMANCE POLYMERS

收录：;EI(收录号：20192006914361);WOS:【SCI-EXPANDED(收录号:WOS:000484947700024)】；

基金：The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This work was supported by the Fundamental Research Funds for the Central Universities, China.

语种：英文

外文关键词：Macromolecular coupling agent; silicon-containing polyimide; thermal stability; thermal pyrolysis mechanism; high-temperature mechanical properties

摘要：In this study, a novel heat-resistant polyimide macromolecular coupling agent (PSI-C) was designed and synthesized. Silicon-containing diamine was one of the monomers used to increase the solubility of the polyimide, and m-aminophenylacetylene was the end-capping reagent that copolymerized with the resin matrix. A silane coupling group was introduced into the side chain to match the reinforced fiber. Thermogravimetric analysis revealed that the 5% thermal decomposition temperature (T-d5) of the cured PSI-C could reach 454 degrees C and the residual rate at 800 degrees C was 53%. Thermal pyrolysis of the vaporized resin showed that the heat-resistant functional group was still detectable at 550 degrees C. The thermal stability of the alkynyl-terminated silicon-containing polyimide silane coupling agent was higher than those of conventional silane coupling agents. The curing process of the composite system was not affected when adding the coupling agent PSI-C to the quartz fiber/alkynyl resin composite. The interlaminar shear strength and bending strength of the composite were increased by 55% and 61%, respectively, at room temperature. The high-temperature retention rate at 500 degrees C reached 58% and 63%.