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Ionic liquid-based random copolymers: a new type of polymer electrolyte with low glass transition temperature

机译:离子液体基无规共聚物:玻璃化转变温度低的新型聚合物电解质

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A new type of polymer electrolyte has been prepared from the side-chains of ionic liquids (IL) and an analogue of ethylene oxide (EO) directly grafted on a polyethylene oxide backbone. By tuning the two types of monomer composition during polymerization, a series of copolymers with different monomer ratios between IL : EO = 8 : 1 to 1 : 4 have been synthesized. All copolymerized polyionic liquids showed higher ionic conductivity than an IL homopolymer. By choosing a composition with IL : EO = 1 : 1, the corresponding polymer gave the highest conductivity, 1.2 x 10(-4) S cm(-1) at room temperature, compared to 9.3 x 10(-6) S cm(-1) from a homopolymer. We attribute this to one order of magnitude improvement of conductivity from a low glass transition temperature (T-g) below -40 degrees C.
机译:从离子液体(IL)的侧链和直接接枝到聚环氧乙烷骨架上的环氧乙烷类似物(EO)制备了一种新型的聚合物电解质。通过在聚合过程中调节两种类型的单体组成,已合成出一系列的单体,它们之间的单体比在IL:EO = 8:1到1:4之间。所有共聚的聚离子液体均显示出比IL均聚物更高的离子电导率。通过选择IL:EO = 1:1的成分,相应的聚合物在室温下的电导率最高,为1.2 x 10(-4)S cm(-1),而在9.3 x 10(-6)S cm(-1)下-1)来自均聚物。我们将其归因于从低于-40摄氏度的低玻璃转化温度(T-g)可以提高电导率一个数量级。

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