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Sulfopropylated ethylene-vinyl alcohol copolymers (s-EVOHs) have been synthesized via reacting 1,3-propanesultone with EVOH. Solution-cast membranes from the s-EVOH and its blend with EVOH of ethylene segment ratio of 44mol% (44E) were prepared. The results of FT-IR, wide angle X-ray diffraction (WAXD) and differential scanning calorimetry (DSC) showed that pendant sulfonic acid groups diminished...
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