Multiblock Copolymers Containing Highly Sulfonated Poly(arylene sulfone) Blocks for Proton Conducting Electrolyte Membranes

摘要: We report on multiblock copolymers consisting of highly sulfonated hydrophilic poly(arylene sulfone) (SPAS) blocks combined with hydrophobic ether (PAES) blocks. Thiol-terminated precursor thioether (SPATS) were first prepared via polycondensations involving a novel tetrasulfonated dichlorotetraphenyldisulfone monomer, followed by coupling pentafluorophenyl end-capped PAES under mild conditions to form SPATS–PAES block copolymers. The bridges the SPATS then selectively oxidized obtain SPAS–PAES containing exclusively sulfone bridges. Thus, SPAS designed for high chain stiffness and stability toward desulfonation had an ion exchange capacity (IEC) 4.2 mequiv g–1. Membranes phase separated nanoscale showed increased thermal decreased water uptake in relation correspo...