PMMA-b-PS基凝胶聚合物电解质的性能  

Properties of PMMA-b-PS Based Gel Polymer Electrolytes

作　　者：宋颖[1] 马晓燕[1] 唐林[1] 周华龙[1] 

机构地区：[1]西北工业大学理学院应用化学系,西安710129

出　　处：《功能高分子学报》2011年第4期335-339,358,共6页Journal of Functional Polymers

基　　金：陕西省自然科学基金(2009JZ004)

摘　　要：通过原子转移自由基聚合反应(ATRP)合成了含刚性聚苯乙烯(PS)链段的聚(甲基丙烯酸甲酯-b-苯乙烯)嵌段共聚物(PMMA-b-PS)。用红外光谱、核磁共振氢谱和凝胶渗透色谱分析了该共聚物的化学结构、分子量及其分布。结果表明:PMMA-b-PS的数均分子量为2.69×105,分子量分布为1.53。以合成的PMMA-b-PS为基体,通过溶液浇铸法制备凝胶聚合物电解质(GPE)薄膜,研究了其电导率。PMMA-b-PS质量分数为40%的GPE具有较好的成膜性和导电性,室温下其电导率为8.82×10-5S/cm;热失重分析表明,该GPE在质量损失5%时的热分解温度为139°C,比相应的纯PMMA基GPE高49°C。Block copolymers PMMA-b-PS were synthesized through atom transfer radical polymerization（ATRP） and characterized by FT-IR,1H-NMR,and gel permeation chromatography（GPC）.The number-average molecular weight and molecular weight distribution were 2.69×105 and 1.53,respectively.A series of PMMA-b-PS based gel polymer electrolytes（GPE） membranes were prepared by solution casting technique.The ion conductivity of GPE membranes was characterized by AC impedance.It was found that 40%（mass fraction） PMMA-b-PS was good for performance of the GPE film with conductivity of 8.82×10-5 S/cm.TGA results of the GPE showed that the thermal decomposition temperature of block copolymer gel electrolyte was 139 °C at 5% mass loss which was 49 °C higher than that of PMMA-based GPE.

关 键 词：聚(甲基丙烯酸甲酯-b-苯乙烯) 原子转移自由基聚合 凝胶电解质 离子电导率 热稳定性 

分 类 号：O63[理学—高分子化学]