文献类型：期刊文献

英文题名：Enhancement of processability, thermal stability, and mechanical properties of phthalonitrile resins via 3-aminophenylacetylene modification

作者：Lian, Lebing[1];Bai, Xiaotao[1];Jiang, Fengguang[1];Zhang, Yongcheng[1];Feng, Xuan[1];Liu, Min[1];Zhou, Quan[1]

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

年份：2025

卷号：235

外文期刊名：EUROPEAN POLYMER JOURNAL

收录：;EI(收录号：20252418598014);WOS:【SCI-EXPANDED(收录号:WOS:001510816600001)】；

基金：The authors gratefully acknowledge the financial support from the National Natural Science Foundation of China (No. 52473075) and the Fundamental Research Funds for the Central Universities (No. JKD01251701) .

语种：英文

外文关键词：Phthalonitrile resin; 3-aminophenylacetylene; Processing properties; Thermal properties; Mechanical properties

摘要：Phthalonitrile resins are widely recognized for their outstanding heat resistance, dielectric properties, and mechanical properties. However, the excessively high melting temperature and narrow processing window constrain their applications in fields such as thermal protection. This study successfully prepared BPL-P resins with enhanced processing, thermal, and mechanical properties by modifying laboratory-synthesized siliconecontaining phthalonitrile (BPL) resins with 3-aminophenylacetylene (APA). The alkyne group in APA can selfpolymerize to form polyene and trisubstituted benzene structures, and the amino group in APA encourages the conversion of cyano groups into triazine and phthalocyanine. These modifications confer exceptional thermal and thermo-oxidative stability to the resins, with the Td5 of BPL-P2 resin (containing 20 wt% APA) reaching 563.2 degrees C and 522.2 degrees C, respectively. Additionally, the strong solubility and relatively low viscosity of APA significantly enhance the processing performance of the resin. The softening point of BPL-P2 resin decreases from 161 degrees C to 94 degrees C, and its processing window expands from 32 degrees C to 59 degrees C under a viscosity of 1 Pa & sdot;s. Moreover, the mechanical properties of the quartz fiber-reinforced composite QF/BPL-P2 were substantially enhanced, with flexural strength increasing from 673.6 MPa to 731.9 MPa at room temperature, and from 115.1 MPa to 358.4 MPa after heat treatment at 400 degrees C for 16 h. These findings broaden the potential applications of phthalonitrile resins in high-end industrial sectors.