Novel partially fluorinated sulfonated poly(arylenethioether)s and poly(aryleneether)s prepared from octafluorotoluene and pentafluoropyridine, and their blends with PBI-Celazol

From polybenzimidazoles to polybenzimidazoliums and polybenzimidazolides

“…246 Following this, the concept has been extended to a wide range of blend systems of m-PBI and various sulfonated derivatives of e.g. poly(arylene thioether)s, 247 partially fluorinated poly(arylene(thio)ether)s 202,248,249 and poly(arylene ether sulfone) copolymers. 250 Blends of m-PBI and perfluorosulfonic acid (Nafion ® ) have been extensively studied using different cationic forms of the ionomer, and visually homogeneous blends could be obtained in the full composition range when the ammonium form was used.…”

Sulfonated fluorinated-aromatic polymers as proton exchange membranes

“…The challenge lies in efficient proton conduction with low methanol crossovers retaining the high temperature properties, sufficient oxidative stability, and mechanical strength with low water uptake at higher sulfonation degree. [103] 1-22 [105] Scheme 17 Representative structures of a sulfonated fluorinated poly(arylene ether) used for preparing blend membrane with PBI.…”

Perfluoropyridine: Discovery, Chemistry, and Applications in Polymers and Material Science

“…Initially, compound 7 was prepared by the nucleophilic thiolation of PFPy, followed by oxidation of the thiol to sulfonic acid. Next, 7 was reacted with 4.4′-thiobisbenzenethiol or 4,4′-dihydroxybiphenol to obtain a new poly(arylene thioether) or poly(arylene ether), respectively ( 8 or 9 , Scheme 11 ) [ 61 ]. Characterization of polymer 8 and 9 by 19 F NMR analysis indicated the structures shown.…”