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将1,4,5,8-萘四羧酸二酐(NTDA)与4,4’-二(4-氨基苯氧基)联苯-3,3’二磺酸(BAPBDS)及3种共聚用二胺单体:2-(4-氨基苯基)-5-氨基-苯并咪唑(APABI)、1,3-二(4-氨基苯氧基)-5-(2-苯并咪唑基)苯(BAPBIB)及4,4’-二(4-氨基苯氧基)联苯(BAPB)在间甲酚中180℃进行无规共聚,分别制得了3种共聚物:主链含咪唑基磺化聚酰亚胺、含侧咪唑基磺化聚酰亚胺及不含咪唑基磺化聚酰亚胺。用溶液浇注法制得了具有良好机械性能的质子交换膜,测定了这些质子交换膜的离子交换容量、吸水率、质子导电率、水解稳定性和抗自由基氧化等性能,重点研究了含咪唑基二胺单体的化学结构对质子交换膜的抗自由基氧化性和水解稳定性的影响规律。
1,4,5,8-naphthalenetetracarboxylic dianhydride (NTDA) and 4,4’-bis (4-aminophenoxy) biphenyl-3,3’disulfonic acid (BAPBDS) The diamines were synthesized using diamine monomers such as 2- (4-aminophenyl) -5-amino-benzimidazole (APABI), 1,3-bis (4- aminophenoxy) -5- ) BAPBIB and 4,4’-bis (4-aminophenoxy) biphenyl (BAPB) were randomly copolymerized at 180 ℃ in m-cresol to prepare three kinds of copolymers respectively: Sulfonated polyimide, imidazole-containing sulfonated polyimide and non-imidazole sulfonated polyimide. Proton exchange membranes with good mechanical properties were prepared by solution casting. The ion exchange capacity, water absorption, proton conductivity, hydrolytic stability and anti-radical oxidation of these proton exchange membranes were measured. Effect of Chemical Structure of Amine Monomer on Antioxidation and Hydrolysis Stability of Proton Exchange Membrane.