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Sulfonated styrene-butadiene-styrene (SSBS) triblock copolymer was cross-linked through condensation of sulfonic acid groups with bis(4-aminophenyl)sulfone to form sulfonamide linkages using a coupling agent (carbonyldiimidazole). Intact and clear light brown membranes were obtained when cast from solution, and cross-linking was established by measuring percent water uptake, determined gravimetrically...
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