Polymer electrolyte membranes based on polystyrenes with phosphonic acid via long alkyl side chains
作者:Youko Tamura、Li Sheng、Satoshi Nakazawa、Tomoya Higashihara、Mitsuru Ueda
DOI:10.1002/pola.26246
日期:2012.10.15
A series of polystyrenes with phosphonic acid (5) via long alkyl side chains (4, 6, and 8 methylene units) were prepared by the radical polymerization of the corresponding diethyl ω‐(4‐vinylphenoxy)alkylphosphonates, followed by the hydrolysis with trimethylsilyl bromide. The resulting phosphonated polystyrene membranes had a high oxidative stability against Fenton's reagent at room temperature. The
通过相应的ω-(4-乙烯基苯氧基)烷基膦酸二乙酯的自由基聚合,然后用三甲基甲硅烷基水解,制备了一系列通过长烷基侧链(4、6和8个亚甲基单元)与膦酸(5)的聚苯乙烯系列。溴化物。所得的膦化聚苯乙烯膜在室温下对芬顿试剂具有高氧化稳定性。由5制备的膜在30至80%相对湿度(RH)的宽范围内表现出非常低的吸水率,类似于Nafion 117的吸水率。这些膜的质子电导率在30%至90%RH的范围内低于Nafion 117的质子电导率,但与报道的具有更高IEC值的膦酸酯化聚合物如膦酸酯化的聚(N-苯基丙烯酰胺)(PDPAA,IEC:6.72 mequiv / g)和带有侧链膦酸的氟化聚合物(M47,IEC:8.5 mequiv / g),在低RH条件下,尽管IEC值低得多(3.0–3.8 mequiv / g)这些膜。这些结果表明,考虑到这些聚合物的吸水率非常低,柔性侧链5的侧链将有助于氢键网络的形成。©2012