Synthesis and investigation of sulfonated poly(<i>p</i>-phenylene)-based ionomers with precisely controlled ion exchange capacity for use as polymer electrolyte membranes
作者:Miru Yoshida-Hirahara、Satoshi Takahashi、Masahiro Yoshizawa-Fujita、Yuko Takeoka、Masahiro Rikukawa
DOI:10.1039/d0ra01816c
日期:——
achieve precise control of sulfonated polymer structures, a series of poly(p-phenylene)-based ionomers with well-controlled ion exchange capacities (IECs) were synthesised via a three-step technique: (1) preceding sulfonation of the monomer with a protecting group, (2) nickel(0) catalysed coupling polymerisation, and (3) cleavage of the protecting group of the polymers. 2,2-Dimethylpropyl-4-[4-(2,5-dichl
为了实现对磺化聚合物结构的精确控制,通过以下方法合成了一系列具有良好控制离子交换容量(IEC)的聚(对苯)基离聚物。三步技术:(1) 用保护基团预先磺化单体,(2) 镍(0) 催化偶联聚合,和 (3) 聚合物保护基团的裂解。通过用氯硫酸和新戊醇处理合成2,2-二甲基丙基-4-[4-(2,5-二氯苯甲酰基)苯氧基]苯磺酸盐(NS-DPBP)作为前述磺化单体。NS-DPBP 易溶于各种有机溶剂,在镍(0) 催化的偶联反应过程中稳定。通过改变 NS-DPBP 的化学计量,获得了具有不同 IEC的磺化聚(4-苯氧基苯甲酰基-1,4-亚苯基)(S-PPBP)均聚物和七种无规共聚物(S-PPBP- co -PPBP)。IEC 和重均分子量 ( M ws) 的离聚物在 0.41–2.84 meq 的范围内。g -1和 143 000–465 000 g mol -1分别。离聚物的吸水率、质子电导率和水扩散特性表现出强烈的