SEARCH Articles Figures Tables Membranes sulfonated Polystyrene sulfonate Polystyrene sulfonated acid Polystyrene sulfonation Polystyrene sulfonic acid Polystyrene sulfonic acid), -sulfonates Sulfonate membranes Sulfonated polystyrene Sulfonated polystyrene sulfonic acid) Sulfonated polystyrene sulfonic acid) membranes