摘要
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。
Three kinds of sulfonated copolyimides（SPIs） ：one with benzimidazote groups embedded in polymer back-bone, one with pendant benzimidazole groups, and one without benzimidazole groups have been synthesized by random con- densation copolymerization of 1,4,5,8-naphthalenetetracarboxylic dianhydride （NTDA） with 4,4 ＇-bis （4-aminophenoxy） bi-phenyl-3,3＇-disulfonic acid（BAPBDS）and three diamine comonomers, 2-（4-aminophenyl）-5-aminobenzimidazole（APABI）, 1,3-bis-（4-aminophenoxy）-5-（2-benzimidazolyl） benzene （BAPBIB） and 4,4 ^-bis （4-aminophenoxy） biphenyl, in m-cresol at 180~C. Membranes with good mechanical strength were fabricated by solution cast method. The properties of the SPI mem- branes such as ion exchange capacity, water uptake, proton conductivity, hydrolytic stability and radical oxidative stability were studied. The effects of the chemical structure of the benzimidazole-group-containing diamine moieties on the oxidative stability and hydrolytic stability were discussed in detail.
出处
《化工新型材料》
CAS
CSCD
北大核心
2014年第2期99-101,110,共4页
New Chemical Materials
基金
上海市自然科学基金资助项目(08ZR1410300)
关键词
质子交换膜
磺化聚酰亚胺
咪唑基
化学稳定性
proton exchange membrane,suIfonated polyimide, benzimidazole group,chemical stability
