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Synthetic approaches for advanced multi-block anion exchange membranes

机译:高级多块阴离子交换膜的合成方法

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摘要

Despite our ability to post-functionalize poly(arylene ether sulfone) multi-block copolymers by rapid chloromethylation, bromination, or acylation, with degrees of functionalization that exceeded 70% in a few hours, materials formed during attempts to prepare fully post-functionalized multi-block copolymers are poorly soluble due to undesired side reactions, such as crosslinking or di-bromination. In particular, clustered reactive sites in multi-block copolymers increase the chance of self-reactions between polymer backbones, resulting in the formation of by-products. On the other hand, the authentic multi-block copolymer with good solubility and high molecular weight was successfully synthesized using functionalized monomers. Despite its low ion-exchange capacity, the resulting multi-block copolymer outperformed the commercial FAA-3-30 membrane in terms of anion conductivity, even under low relative humidity conditions.
机译:尽管我们能够通过快速氯甲基化,溴化或酰化,溴化或酰化多嵌段共聚物,官能化在几小时内超过70%的官能化,在尝试完全官能化多功能后形成的材料 - 受阻共聚物由于不希望的副反应而易溶,例如交联或二溴化物。 特别地,多嵌段共聚物中的聚类反应性位点增加了聚合物骨架之间的自我反应的可能性,从而形成副产物的形成。 另一方面,使用官能化单体成功地合成了具有良好溶解度和高分子量的真实的多嵌段共聚物。 尽管其离子交换能力低,所得到的多嵌段共聚物在阴离子电导率方面,即使在低相对湿度条件下也能占商业FAA-3-30膜。

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  • 来源
    《RSC Advances》 |2019年第37期|共10页
  • 作者单位

    Korea Inst Energy Res Fuel Cell Lab Daejeon 34129 South Korea;

    Korea Inst Energy Res Fuel Cell Lab Daejeon 34129 South Korea;

    Korea Inst Energy Res Fuel Cell Lab Daejeon 34129 South Korea;

    Korea Inst Energy Res Fuel Cell Lab Daejeon 34129 South Korea;

    Korea Inst Energy Res Fuel Cell Lab Daejeon 34129 South Korea;

    Korea Inst Sci &

    Technol Fuel Cell Res Ctr Seoul 02792 South Korea;

    Korea Inst Sci &

    Technol Fuel Cell Res Ctr Seoul 02792 South Korea;

    Korea Inst Energy Res Fuel Cell Lab Daejeon 34129 South Korea;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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