The synthesis of soluble polyelectrolytes by sulphonation of polystyrene

Highly sulfonated polyelectrolytes through friedel–crafts sulfonylation of polyarylenes

“…For example, sulfonated polyarylenes with high proton conductivity, chemical, and thermal stability, and film toughness have prepared by electrophilic sulfonation of polyarylenes . One limitation to sulfonation of aromatic polymers is cross‐linking through the formation of sulfone groups between chains by Friedel–Craft chemistry . This Friedel–Craft sulfonylation, cross‐linking reaction was the inspiration for our present strategy for preparing highly sulfonated polyarylenes.…”