Studies and Synthesizes Sulfonylimided Poly(phenylene) Membranes by Super Acid-Catalyzed Reaction for PEMFC

Imidation of the polymer was synthesized by condensation poly(phenylene) and sulfamoyl fluoride, and studied as a proton exchange fuel cell. Poly(phenylene) was prepared from monomer N-methyl isatin and biphenyl by a super acid catalyzed polyhydroxy alkylation reactions. The sulfamoyl fluoride was performed in two steps, firstly, fluorosulfonyl isocyanate was synthesized by chlorosulfonyl isocyanate and antimony trifluoride, and then condensation with formic acid. The chemical structures of monomers and polymers were confirmed by
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H NMR spectroscopy. IEC values of sulfonated poly(phenylene) and sulfonylimided poly(phenylene) were 1.91meq/g and 2.10 meq/g for 30% ionic groups, respectively.