Fluorinated Poly(aryl ether) Containing a 4‐Bromophenyl Pendant Group and its Phosphonated Derivative

Abstract

Summary: A high‐molecular‐weight fluorinated poly(aryl ether) with a 4‐bromophenyl pendant group has been synthesized based on a bromo‐bisphenol. A phosphonic acid derivative is readily prepared from this in high conversion yield. The phosphonated polymer possesses excellent thermal, oxidative, and dimensional stability, low methanol permeability, and reasonable proton conductivity, and may be a candidate polymeric electrolyte membrane for fuel cell applications.

Aromatic Poly(ether ketone)s with Pendant Sulfonic Acid Phenyl Groups Prepared by a Mild Sulfonation Method for Proton Exchange Membranes

“…However, high cost, low operation temperature (e80°C), high methanol crossover, and environmental recycling uncertainties of Nafion and other similar perfluorinated membranes are limiting their widespread commercial application in PEMFC and DMFC. [3][4][5][6] Aromatic polymers with sulfonic acid groups are promising materials for PEMs and polymer-inorganic hybrid membranes because of their outstanding thermal and chemical stability. Sulfonated derivatives of poly(ether sulfone) (SPES), [7][8][9] polyimide (SPI), [10][11][12] polyimidazole, 13 poly(aryl ether), 14,15 polyphenylene, 16,17 and polybenzimidazole 18 are among those being investigated as potential PEMs.…”

Radiation-induced grafting of styrene onto ultra-high molecular weight polyethylene powder for polymer electrolyte fuel cell application

“…The current price for Nafion membranes is of the order of US $100 per kilowatt of generated electric power [6]. These factors, in addition to environmental recycling uncertainties of perfluorinated membranes, have combined to limit their widespread commercial application in PEMFC and DMFC [7,8]. Currently, there is much ongoing research for developing non-perfluorinated polymers with better performance and lower cost as alternative PEM materials [7,[9][10][11].…”

Synthesis of crosslinked polystyrene-b-poly(hydroxyethyl methacrylate)-b-poly(styrene sulfonic acid) triblock copolymer for electrolyte membranes

“…1,2 Especially, sulfonated polymer membranes have been extensively investigated for the applications to fuel cells, as can be seen from the increasing number of research papers. [3][4][5][6][7][8][9] The commercially available membranes in fuel cells are mostly based on perfluorosulfonic polymers such as Nafion, Gore-Select, Aciplex, Xus and Flemiom. They exhibited the excellent thermal and mechanical properties as well as high proton conductivity (around 0.1 S/cm at room temperature).…”

“…Therefore, there has been a great deal of research into alternative sulfonated polymeric materials. [3][4][5][6][7][8][9] A high proton conductivity of sulfonated polymer membranes has been considered essential to improve the efficiency of fuel cells. The sulfonated polymers with high degree of sulfonation exhibit high proton conductivity but typically produce water solubility, leading to their inadequate use for fuel cells or other applications.…”