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通过成醚反应制备了一种新型含砜基的萘酐:4,4’-(砜基双(4,1-亚苯基)双氧)-双(1,8-萘酐)(SPNDA)。利用这种新的萘酐先与己二胺(HDA)反应形成疏水段,再与4,4’-二(4-氨基苯氧基)-3,3’-联苯二磺酸(BAPBDS)和1,4,5,8-萘四甲酸二酐(NTDA)共聚,合成了一系列磺化聚酰亚胺序列共聚物。所得的共聚物具有良好的成膜性,XRD表明了非晶相聚合物中存在部分准晶体。共聚物膜具有良好的化学稳定性和热稳定性,尺寸变化率和吸水率较文献中具有相似结构相同IEC的聚合物膜均有一定程度的减少。质子传导率80℃下达到0.11~0.16S/cm。
A novel sulfone group-containing naphthalene anhydride was prepared through the ether-forming reaction: 4,4 ’- (sulfonebis (4,1-phenylene) dioxy) . The new naphthalene anhydride is first reacted with hexamethylenediamine (HDA) to form a hydrophobic segment and then reacted with 4,4’-bis (4-aminophenoxy) -3,3’-biphenyldisulfonic acid (BAPBDS) And 1,4,5,8-naphthalene tetracarboxylic dianhydride (NTDA), a series of sulfonated polyimide sequence copolymers were synthesized. The resulting copolymer had good film formability and XRD showed that some of the quasicrystals were present in the amorphous phase polymer. Copolymer film has good chemical stability and thermal stability, dimensional change rate and water absorption than the literature have the same structure with the same IEC polymer films have a certain degree of reduction. The proton conductivity reaches 0.11 to 0.16 S / cm at 80 ° C.