蝌蚪型POSS嵌段共聚物的合成及其质子交换膜的性能

Synthesis and Property of Proton Exchange Membrane Based on Tadpole-type POSS Block Copolymer

以聚倍半硅氧烷(POSS)为引发剂,用原子转移自由基聚合方法(ATRP)合成聚甲基丙烯酸甲酯与聚苯乙烯嵌段共聚物(PMMA-b-PS)为臂的蝌蚪型POSS嵌段共聚物,并使用红外光谱、核磁共振及GPC等手段分析其结构。结果表明,合成的蝌蚪型POSS嵌段共聚物结构规整。以蝌蚪型POSS嵌段共聚物为基体制备质子交换膜,研究了离子交换容量、吸水率及溶胀率,质子传导率及热性能。结果表明,蝌蚪型POSS嵌段共聚物质子交换膜在高温具有较高的质子传导率、较高的初始热分解温度和耐高温性能。

Tadpoles-type POSS block copolymer with polystyrene block copolymer and polymethyl methacrylate as arms（PMMA-b-PS） was synthesized by atom transfer radical polymerization（ATRP）method with polysilsesquioxane（POSS） as the initiator and polystyrene block copolymer and polymethyl methacrylate as raw material, and then was characterized by means of FTIR,1H NMR and GPC. The results show that the tadpoles-type POSS block copolymer was synthesized successfully. Proton exchange membrane based on the tadpoles-type POSS type block copolymer was prepared, of which the ion exchange capacity, water uptake and swelling rate, proton conductivity and thermal performance was assessed.The results show that proton exchange membrane based on the tadpole-type POSS block copolymer has higher proton conductivity at high temperature as well as high initial decomposition temperature and high temperature resistant performance.