文献类型：期刊文献

英文题名：High-performance poly(methylsilane arylether arylacetylene) resins with low curing temperatures and weak secondary relaxations

作者：Li, Jixian[1];Gong, Changjun[1];Lv, Shuaikang[1];Tang, Junkun[1];Yuan, Qiaolong[1];Huang, Farong[1,2]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Specially Funct Mat & Related Technol, Minist Educ, Shanghai, Peoples R China;[2]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Specially Funct Mat & Related Technol, Minist Educ, Shanghai 200237, Peoples R China

年份：2024

卷号：141

期号：5

外文期刊名：JOURNAL OF APPLIED POLYMER SCIENCE

收录：;EI(收录号：20234615070082);WOS:【SCI-EXPANDED(收录号:WOS:001103401000001)】；

基金：The authors gratefully acknowledge the support of the Fundamental Research Funds for the Central Universities (JKD01231701).

语种：英文

外文关键词：heat-resistant resins; high-performance resins; linking positions of benzene rings; poly(methylsilane arylether arylacetylene); secondary relaxation

摘要：A series of poly(methylsilane arylether arylacetylene) (PSEA-H) resins were synthesized from methyldichlorosilane and isomeric arylether arylacetylenes, and characterized by 1H-NMR and FT-IR spectroscopies. The effect of reactive Si-H groups and the linking positions of benzene rings in the arylether arylacetylene units on the properties of the resins were investigated. The results show that PSEA-H resins possess good processability with processing windows of over 80 degrees C. The introduction of Si-H groups reduces the curing temperatures for PSEA-H resins and weakens the secondary relaxation for the cured PSEA-H resins. The cured resins and T300 carbon fiber (T300CF) reinforced composites display high mechanical properties. The flexural strengths of a cured PSEA-H resin and its T300CF composite at room temperature reach 64.2 and 426.5 MPa, respectively. The flexural properties depend on the linking positions of benzene rings. The cured PSEA-H resins show excellent heat resistance with a temperature of 5% weight loss (Td5) above 500 degrees C.