Synthesis of sulfonated poly(phthalazinone ether sulfone)s by direct polymerization

摘要

Sulfonated poly(phthalazinone ether sulfone)s with high molecular weight were directly prepared by polycondensation of 4-(4-hydroxyphenyl) phthalazinone with various ratios of disodium 5.5'-sulfonylbis(2-fluoro-benzenesulfonate) to 4-fluorophenyl sulfone. The resulting ionomers with high IEC showed low swelling. The low swelling orginates from intermolecular hydrogen bonds, which is confirmed by variable temeprature IR spectroscopy. The membranes show very good perspectives in PEMFC applications.