高珊珊^1,2,王文硕¹,包永忠¹

• 1:化学工程联合国家重点实验室(浙江大学)，浙江大学 化学工程与生物工程学院，浙江 杭州 310058
• 2:贵州大学 化学与化工学院，贵州 贵阳 550025

摘要(Abstract)：

为了制备综合性能优异的固态聚合物电解质基材，通过碘转移活性自由基聚合(ITP)合成聚偏氟乙烯-b-聚甲氧基聚乙二醇甲基丙烯酸酯(PVDF-b-PPEGMA)共聚物。通过¹H-核磁共振和凝胶渗透色谱证明了共聚物分子的合成，采用红外光谱和透射电子显微镜分析共聚物的凝聚态结构，并测试共聚物/双三氟甲基磺酰亚胺锂(LiTFSi)固态聚合物电解质的电导率。结果表明：聚甲氧基聚乙二醇甲基丙烯酸酯(PPEGMA)链段的嵌段引入可促进β相聚偏氟乙烯(PVDF)结晶的形成；PVDF和PPEGMA链段热力学不相容，嵌段共聚物存在微相分离，随着PPEGMA嵌段比增加，共聚物由“海-岛”相结构向双连续相结构转变。PPEGMA质量分数为25.5% 的嵌段共聚物与锂盐混合(氧化乙烯与Li⁺物质的量比n(EO):n(Li⁺)为10:1)能达到9.4×10^-5 S·cm^-1的室温离子电导率。

关键词(KeyWords)： 偏氟乙烯;甲氧基聚乙二醇甲基丙烯酸酯;嵌段共聚物;结晶;相结构

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 高珊珊^1,2,王文硕¹,包永忠¹

DOI: 10.3969/j.issn.1003-9015.2023.04.006

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