Preparation and characterization of polyvinyl chloride/styrene butadiene rubber blend heterogeneous cation exchange membrane modified by potassium perchlorate

► The effect of KClO4 on properties of ion-exchange membrane was studied. ► Increase of additive loading led to improvement in resin particles distribution. ► Additive particles led to narrow ionic channels formation in membrane matrix. ► The membrane selectivity was increased by additive increasing and then decreased. ► Treated membrane with 8 wt.% KClO4 showed better selectivity compared to others.