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A series of sulfonated polyimide/poly (vinyl alcohol-co-vinyl acetate) (SPI/PVA-co-PVAc) composite membranes was facilely prepared from blending SPI salt with 80% hydrolyzed PVA-co-PVAc in m-cresol followed by casting. A miscible system of the prepared composite membranes was confirmed by scanning electron microscopy (SEM). Properties required for a proton exchange membrane, such as ion exchange capacity,...
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