阳离子超支化聚合物电解质的合成及离子传导性能研究

Synthesis and performance of hyperbranched polymer electrolytes with terminal alkylimidazolium cationic groups

以间苯三酚、1,2,4-偏苯三酸酐和环氧氯丙烷为原料合成不同支化度的超支化聚合物(HBP),利用合成的超支化聚合物外围的氯原子与N-甲基咪唑进行离子化反应,制备含咪唑阳离子的超支化聚合物电解质(HBPE)。利用1H-NMR、FT-IR、DSC、TG和复阻抗谱分析等对HBPE的化学结构,热力学性能和离子传导性能进行了研究,结果表明,该聚合物电解质室温离子电导率可达2.3×10-4S/cm,热稳定性在270℃以上。

Hyperbranched polymer （HBP） was synthesized from phloroglucinol （as the central core）, 1,2,4-tri- mellitic anhydride, and epichlorohydrin, and then hyperbranehed polymer electrolytes （HBPE） with terminal alkylimidazolium cationic groups were prepared by using the peripheral chlorine group of synthetic HBP to react with N-methyl imidazole. The chemical structure, thermal behavior, and ionic conductive property of the HB- PE were investigated by 1H-NMR, FT-IR, differential scanning calorimetry, thermogravimetric analyzer, and complex impedance analysis, respectively. The HBPE can achieve an ionic conductivity of 2.3 ×10^-4 S/cm at room temperature. Thermogravimetric result revealed that they have good thermal stability up to about 270℃.