Electrochemical comparison of two sulfonated styrene PEM membranes synthesized by different methods

The synthesis of two random copolymers was carried out by radical copolymerization. Poly(styrene-co-acrylic acid) in a 94:6 (St:AA) molar ratio, partially cross-linked with trimethylol propane trimethacrylate was synthesized by mass polymerization and then sulfonated (PSAAS-m) with sulfuric acid. On the other hand, the same random PSAA was synthesized by solution polymerization, but cross-linked with divinylbenzene and then sulfonated (PSAAS-s)....