软嵌段磺化苯乙烯-丁二烯-苯乙烯(SBS)三嵌段共聚物质子交换膜†

IF 3.9 2区 化学 Q2 POLYMER SCIENCE
Michael K. Pagels , Ding Tian , Stefan Turan , Chulsung Bae
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引用次数: 0

摘要

通过聚苯乙烯-b-聚丁二烯-b-聚苯乙烯的部分加氢反应,再进行巯基咔嗒反应和氧化反应,生成中间嵌段磺化SEBS质子交换膜的新合成方法。通过将磺化位点从硬的聚苯乙烯端段切换到软的聚(乙烯-对丁烯)中间段,由于缺乏聚苯乙烯段内的增塑作用,中间段磺化SEBS膜在水中的溶胀率较低,尺寸稳定性优于类似磺酸盐浓度的常规聚苯乙烯段磺化SEBS膜。在巯基咔嗒反应后,通过加入光酸将未反应的碳-碳双键交联,进一步抑制了水的吸收。交联膜在水中表现出良好的导电性和弹性力学性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Soft block sulfonated styrene–butadiene–styrene (SBS) triblock copolymer proton exchange membranes

Soft block sulfonated styrene–butadiene–styrene (SBS) triblock copolymer proton exchange membranes
A new synthetic method that generates a middle block sulfonated SEBS proton exchange membrane through partial hydrogenation of polystyrene-b-polybutadiene-b-polystyrene and a subsequent thiol–ene click reaction and oxidation. By switching the sulfonation site from hard polystyrene end blocks to the soft poly(ethylene-r-butylene) middle block, the middle block sulfonated SEBS membranes showed lower swelling in water and greater dimensional stability than conventional polystyrene block sulfonated SEBSs with similar sulfonate concentrations because of the lack of the plasticization effect of the polystyrene block. Water uptake can be suppressed further by crosslinking unreacted carbon–carbon double bonds in the backbone after the thiol–ene click reaction by the addition of a photoacid. Crosslinked membranes showed good conductivity in water and resilient mechanical properties in stress–strain analysis.
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来源期刊
Polymer Chemistry
Polymer Chemistry POLYMER SCIENCE-
CiteScore
8.60
自引率
8.70%
发文量
535
审稿时长
1.7 months
期刊介绍: Polymer Chemistry welcomes submissions in all areas of polymer science that have a strong focus on macromolecular chemistry. Manuscripts may cover a broad range of fields, yet no direct application focus is required.
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