Michael K. Pagels , Ding Tian , Stefan Turan , Chulsung Bae
{"title":"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†","authors":"Michael K. Pagels , Ding Tian , Stefan Turan , Chulsung Bae","doi":"10.1039/d5py00569h","DOIUrl":null,"url":null,"abstract":"<div><div>A new synthetic method that generates a middle block sulfonated SEBS proton exchange membrane through partial hydrogenation of polystyrene-<em>b</em>-polybutadiene-<em>b</em>-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-<em>r</em>-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.</div></div>","PeriodicalId":100,"journal":{"name":"Polymer Chemistry","volume":"16 35","pages":"Pages 3977-3985"},"PeriodicalIF":3.9000,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Soft block sulfonated styrene–butadiene–styrene (SBS) triblock copolymer proton exchange membranes\",\"authors\":\"Michael K. Pagels , Ding Tian , Stefan Turan , Chulsung Bae\",\"doi\":\"10.1039/d5py00569h\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>A new synthetic method that generates a middle block sulfonated SEBS proton exchange membrane through partial hydrogenation of polystyrene-<em>b</em>-polybutadiene-<em>b</em>-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-<em>r</em>-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.</div></div>\",\"PeriodicalId\":100,\"journal\":{\"name\":\"Polymer Chemistry\",\"volume\":\"16 35\",\"pages\":\"Pages 3977-3985\"},\"PeriodicalIF\":3.9000,\"publicationDate\":\"2025-08-19\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Polymer Chemistry\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://www.sciencedirect.com/org/science/article/pii/S1759995425002761\",\"RegionNum\":2,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"POLYMER SCIENCE\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Polymer Chemistry","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/org/science/article/pii/S1759995425002761","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"POLYMER SCIENCE","Score":null,"Total":0}
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.
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.