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用聚乙二醇(PEG1500)和甲醇先后与共聚物(P(MMA-MAh))发生酯化反应,合成得到交联聚合物P(MMA-MAh)-PEG1500.以该交联聚合物P(MMA-MAh)-PEG1500、碳酸丙烯酯(PC)和锂盐(LiClO4)为三种组分制备凝胶聚合物电解质,电解质性能必会受到这些组分间存在的微观相互作用的影响.采用FTIR来研究PC和P(MMA-MAh)-PEG1500中存在的极性基团(C=O和C—O—C)与Li+的相互作用.对于PC/LiClO4和polymer/LiClO4体系,FTIR定量分析显示,极性基团对Li+的吸收系数分别为0.113和0.267,说明在红外光谱中Li+键合C=O和C—O—C极性基团比自由极性基团吸收灵敏度高;另外,计算该二体系中Li+键合极性基团(C=O和C—O—C)的当量百分数极限值分别为94%和45%,表明极性基团与Li+间存在的相互作用是可逆的,并且体系PC/LiClO4中相互作用强度大于体系polymer/LiClO4.
The cross-linked polymer P (MMA-MAh) -PEG 1500 was synthesized through esterification with polyethylene glycol (PEG1500) and methanol (P (MMA-MAh) MMA-MAh) -PEG1500, propylene carbonate (PC) and lithium salt (LiClO4) were used to prepare gel polymer electrolytes, and the electrolyte performance would be affected by the microscopic interaction between these components.Using FTIR To study the interaction of polar groups (C═O and C-O-C) with Li + present in PC and P (MMA-MAh) -PEG 1500. For the PC / LiClO 4 and polymer / LiClO 4 systems, FTIR quantitative analysis , And the absorption coefficients of Li + on the polar groups were 0.113 and 0.267, respectively, indicating that the Li + -bonded C═O and C-O-C polar groups have higher absorption sensitivity than the free polar groups in the infrared spectrum. In addition, The equivalent percentage limits of the Li + -bonded polar groups (C = O and C-O-C) in the two systems were 94% and 45%, respectively, indicating that the interaction between the polar groups and Li + is reversible , And the interaction strength in system PC / LiClO4 is greater than that of polymer / LiClO4.