Sulfonated Poly(arylene-<i>co</i>-naphthalimide)s Synthesized by Copolymerization of Primarily Sulfonated Monomer and Fluorinated Naphthalimide Dichlorides as Novel Polymers for Proton Exchange Membranes
作者:Zhiming Qiu、Shuqing Wu、Zhiying Li、Suobo Zhang、Wei Xing、Changpeng Liu
DOI:10.1021/ma060275k
日期:2006.9.1
A novel sulfonated aromatic dichloride monomer was successfully prepared by the reaction of 2, 5-dichlorobenzophenone with fuming sulfuric acid. Copolymerization of this monomer in the form of sodium salt (1) with N-(4-chloro-2-trifluoromethylphenyl)-5-chloro-1,8-naphthalimide (2) or bis(N-(4-chloro-2-trifluoromethylphenyl)-1,4,5,8-naphthalimide (3) generated two series of novel poly(arylene-co-naphthalimide)s
通过2,5-二氯二苯甲酮与发烟硫酸的反应成功地制备了一种新型的磺化芳族二氯化物单体。该单体以钠盐(1)的形式与N-(4-氯-2-三氟甲基苯基)-5-氯-1,8-萘二甲酰亚胺(2)或双(N-(4-氯-2-三氟甲基苯基)-1,4,5,8-萘二甲酰亚胺(3)生成了两个系列的新型聚(亚芳基-co-萘二甲酰亚胺)I - x和II- x,其中x代表磺化单体的含量。 -SO 3侧链中的H基团具有高分子量,这是由于它们的高粘度以及坚韧而柔性的膜的形成所揭示的。由于引入了疏水性CF 3基,该共聚物对水和氧化表现出优异的稳定性。与1,8-萘二甲酰亚胺(I - x)具有比1,4,5,8-萘二甲酰亚胺更好的水解和氧化稳定性。室温下,共聚物I-50膜在Fenton试剂中的耐久时间超过83小时。将I-50膜浸入沸水中196小时后,其机械性能几乎保持不变。共聚物薄膜的质子电导率随IEC和温度的升高而增加,在80°C时达到6