双甲基丙烯酰氧基聚乙二醇与甲基丙烯酸盐共聚及导电性

SYNTHESIS OF α,ωBISMETHACRYLOYL CAPPED POLY(ETHYLENE GLYCOL) AND CONDUCTIVITY OF ITS COPOLYMER WITH SALT OF METHACRYLIC ACID

在合成α，ω－双甲基丙烯酰氧基封端的聚乙二醇（ＢＭＡＰＥＧ）的基础上，通过ＢＭＡＰＥＧ与甲基丙烯酸盐（ＭＡＡＭ）共聚，制备了离子导电率（σ）在３０℃时为４．０×１０－６Ｓ／ｃｍ的单离子传导的ＡＢ交联型聚醚类固体电解质（ＡＢＣＰＥ）。研究了影响ＡＢＣＰＥ离子导电率的因素。结果表明，用甲基丙烯酰氯与聚乙二醇进行酯化反应可以合成所期望结构的ＢＭＡＰＥＧ。ＡＢＣＰＥ的σ随ＰＥＧ链段长度和共聚单体浓度的增加出现最大值；降低ＢＭＡＰＥＧ的双键官能度，或升高温度，σ升高。

Single ion conducting AB crosslinked polyether solid electrolytes(ABCPE) with ionic conductivity(σ) of 4.0×10-6 S/cm(30 ℃) were obtained by copolymerizing salt of methacrylic acid(MAAM) with α,ωbismethacryloyl capped poly(ethylene glycol)(BMAPEG), which was synthesized by reaction of methacryloyl chlorid with poly(ethylene glycol)( PEG). BMAPEG was characterized by IR, UV and 1HNMR. The factors influencing σ of ABCPE were studied. The results show that the maxium σ occurred at both the optimum comonomer concentration and the optimum segmental chain length of PEG, while σ increased with decreasing crosslinking degree of ABCPE, or with increasing temperature.