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合成了一种新型的含邻苯二甲腈基团的二胺4-(2,4-二氨基苯氧基)邻苯二甲腈(CNDA),将它与苯甲酰氯和间苯二甲酰氯反应,分别合成了溶解性能良好的酰胺模型化合物(b-CNPA)和酰胺聚合物(m-CNPA),并分别在265℃和275℃对它们进行热固化反应。热重分析(TGA),差示扫描量热分析(DSC)和红外光谱(FT-IR)对固化前后的b-CNPA和m-CNPA进行了对比研究,发现一定条件下的热处理可以实现侧链氰基的固化交联,热固化后的b-CNPA和m-CNPA的热分解温度和残炭率升高,在375℃没有玻璃化转变温度出现,热稳定性和耐热性能提高,且热固化后的b-CNPA和m-CNPA溶解性能下降明显,耐溶剂性能得到一定改善。
A novel 4- (2,4-diaminophenoxy) phthalonitrile (CNDA) containing phthalonitrile group was synthesized and reacted with benzoyl chloride and m-xylene (B-CNPA) and amide polymer (m-CNPA) with good solubility were synthesized and reacted at 265 ℃ and 275 ℃ respectively. The results of thermal gravimetric analysis (TGA), differential scanning calorimetry (DSC) and Fourier transform infrared spectroscopy (FT-IR) show that b-CNPA and m-CNPA before and after curing show that under certain conditions, Cyano-cured cross-linked, heat-cured b-CNPA and m-CNPA pyrolysis temperature and carbon residue rate increased at 375 ℃ no glass transition temperature appears, thermal stability and heat resistance can be improved, and heat Solubility of b-CNPA and m-CNPA after curing decreased significantly, and solvent resistance was improved.