文献类型：期刊文献

英文题名：Synergistic enhancement of processability and thermal properties in phthalonitrile resins via incorporation of silicon-containing arylacetylene

作者：Guan, Yichen[1];Tang, Hongfang[1];Liu, Xiwei[1];Hu, Jianke[1];Ping, Zijian[1];Hu, Yanhong[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Specially Funct Polymer Mat & Related Tech, Minist Educ, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2026

外文期刊名：HIGH PERFORMANCE POLYMERS

收录：;EI(收录号：20262621002906);WOS:【SCI-EXPANDED(收录号:WOS:001804741100001)】；

基金：The authors disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: Yichen Guan, Hongfang Tang, Xiwei Liu, Jianke Hu, Zijian Ping, Yanhong Hu supported by the Fundamental Research Funds for the Central Universities (No. JKD01261701).

语种：英文

外文关键词：phthalonitrile resin; silicon-containing arylacetylene; resin matrix composite; processing performance; heat resistance

摘要：Phthalonitrile (PN) resin has attracted significant attention due to its exceptional thermal stability and mechanical properties. However, the requirement for elevated curing temperatures remains a critical challenge for their widespread practical applications. In this study, phthalonitrile containing branched cyanine (BPN) was blended with silicon-containing arylacetylene (PSA) to investigate their synergistic curing effects. The 10 wt% PSA formulation offers an optimal trade-off, demonstrating that moderate PSA loading synergistically enhances both processability and thermal stability without compromising high-temperature mechanical robustness: a reduction of the initial curing temperature from 234.3 degrees C to 198.7 degrees C and a decrease in the melting point from 161.6 degrees C to 147.4 degrees C. Conversely, the processing window expanded from 41.3 degrees C to 54.7 degrees C. Furthermore, the system exhibited enhanced thermal stability, evidenced by an increase in the 5% weight loss temperature (T d5 ) from 530.33 degrees C to 552.38 degrees C and a rise in the char yield from 75.73% to 80.13%. No distinct glass transition was detected below 400 degrees C, indicating a substantial improvement in both the processability and thermal stability of the blend system. Although the incorporation of PSA resulted in a slight reduction in the mechanical properties of BPN, the blends retained excellent mechanical performance at elevated temperatures, surpassing the room-temperature properties of PSA. The findings significantly enhance the industrial viability of phthalonitrile-based materials, effectively paving the way for their large-scale deployment in high-performance sectors.