P(VAc-MA)/PMMA为基体的聚合物电解质制备及其在电致变色器件中的应用  

Synthesis of Polymer Electrolyte Based on P(VAc-MA)/PMMA and Its Application in Electrochromic Devices

作　　者：杨道均[1] 傅相锴[1] 蒋庆龙[1] 龚永锋[1] 

机构地区：[1]西南大学化学化工学院应用化学研究所

出　　处：《高等学校化学学报》2007年第9期1781-1786,共6页Chemical Journal of Chinese Universities

摘　　要：以醋酸乙烯酯(VAc)和丙烯酸甲酯(MA)为单体,采用半连续种子乳液聚合法制备了无规共聚物P(VAc-MA),以PMMA与P(VAc-MA)的共混物为基体制备了聚合物电解质.用红外光谱(FTIR)、X射线衍射(XRD)、热重分析(TG)、紫外光谱(UV)、力学性能测试及电化学交流阻抗等方法研究了聚合物、聚合物膜和聚合物电解质的性质.结果表明,VAc与MA通过打开各自的CC键聚合生成P(VAc-MA);P(VAc-MA)与PMMA共混后结晶状态发生了变化,增加了无定形相区,降低了链段运动的能量壁垒,提高了热稳定性和拉伸强度.以P(VAc-MA)/PMMA为基体的聚合物电解质膜具有很高的透明性,最大室温电导率达到1.17×10-3S/cm;离子电导率随着温度的升高而迅速增加,电导率-温度曲线符合Arrhenius方程;将此电解质用于全固态电致变色显示器件显示出优良的性能.A random copolymer P（VAc-MA） was synthesized via seeded emulsion copolymerization with vinyl acetate（VAc） and methyl acrylate （MA） as the monomers, and the polymer electrolytes comprising blend of the corresponding copolymer P（VAc-MA） and PMMA as a host polymer and LiClO4 as a dopant were prepared with solution casting technique. The performances of the synthesized copolymer and prepared polymer membrane and electrolyte were studied with F-FIR, XRD, TG, UV, mechanical testing and AC impedance. It was found that copolymer P（VAc-MA） was formed with breaking the double bonds of monomers. After blending P（VAc-MA） and PMMA, the energy barrier of the segmental motion in the polymer electrolyte was reduced because of the amorphous nature increased; the thermal stability and mechanical performance increased. The polymer electrolytes based on blends P（ VAc-MA）/PMMA possess an excellent transparence and the maximum ionic conductivity value was found to reach 1.17 × 10^-3 S/cm at 25 ℃ ; the ionic conductivity increases as temperature rising, the conductivity temperature plots are found to follow basically the Arrhenius equation. The polymer electrolytes were further evaluated in electrochromic devices （ECD） fabricated by transparent PET-ITO and electrochromic active viologen derivative films, and its excellent performance promised the usage of the polymer electrolytes as the ionic conductor material in ECD.

关 键 词：聚(醋酸乙烯酯-丙烯酸甲酯) 聚甲基丙烯酸甲酯 聚合物电解质 离子电导率 电致变色器件 

分 类 号：O631.23[理学—高分子化学]