以3,3’,4,4’-二苯酮四酸二酐(简称酮酐)(BTDA),甲苯二异氰酸酯(TDI),4,4’-二苯基甲烷二异氰酸酯(MDI)为原料,通过一步法合成三元共聚聚酰亚胺.并利用傅里叶变换红外光谱(FT-IR)、激光拉曼光谱(Raman)、核磁共振波谱(1H-NMR)对产物的化学结构进行表征.利用正交试验对该聚合反应的影响因素进行研究,得出最优化的反应条件:反应温度为80℃,BTDA与二异氰酸酯(-CNO)的摩尔比为1∶1.05,滴加速率为14 s/d～16 s/d(秒/滴),催化剂的质量为0.005g.并对试验结果进行方差分析,得到影响聚合物相对分子质量的显著性因素为BTDA与二异氰酸酯(-CNO)的摩尔比.
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