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Title: Copoly(arylene ether)s containing pendant sulfonic acid groups as proton exchange membranes

Abstract

A copoly(arylene ether) (PAE) with high fluorine content and a copoly(arylene ether nitrile) (PAEN) with high nitrile content, each containing pendant phenyl sulfonic acids were synthesized. The PAE and P AEN were prepared from decafluorobiphenyl (DFBP) and difluorobenzonitrile (DFBN) respectively, by polycondensation with 2phenylhydroquinone (PHQ) by conventional aromatic nucleophilic substitution reactions. sulfonic acid groups were introduced by mild post-sulfonation exclusively on the para-position of the pendant phenyl ring in PHQ. The membrane properties of the resulting sulfonated copolymers sPAE and sPAEN were compared for fuel cell applications. The copolymers sPAE and sPAEN, each having a degree of sulfonation (OS) of 1.0 had high ion exchange capacities (IEC{sub v})(wet) (volume-based, wet state) of 1.77 and 2.55 meq./cm3, high proton conductivities of 135.4 and 140.1 mS/cm at 80 C, and acceptable volume-based water uptake of 44.5 -51.9 vol% at 80 C, respectively, compared to Nafion. The data points of these copolymer membranes are located in the upper left-hand corner in the trade-off plot of alternative hydrocarbon polyelectrolyte membranes (PEM) for the relationship between proton conductivity versus water uptake (weight based or volume based), i.e., high proton conductivity and low water uptake. Furthermore, the relative selectivity derived from proton conductivity and methanol permeabilitymore » is higher than that of Nafion.« less

Authors:
 [1];  [1];  [2];  [2]
  1. Los Alamos National Laboratory
  2. CANADA-NRC
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
956392
Report Number(s):
LA-UR-09-00754; LA-UR-09-754
TRN: US201013%%95
DOE Contract Number:  
AC52-06NA25396
Resource Type:
Journal Article
Journal Name:
Macromolecules
Additional Journal Information:
Journal Name: Macromolecules
Country of Publication:
United States
Language:
English
Subject:
36; AROMATICS; COPOLYMERS; ETHERS; FLUORINE; FUEL CELLS; HYDROCARBONS; ION EXCHANGE; MEMBRANES; METHANOL; NITRILES; PERMEABILITY; PROTONS; SULFONATION; SULFONIC ACIDS; WATER

Citation Formats

Dae Sik, Kim, Yu Seung, Kim, Gilles, Robertson, and Guiver, Michael D. Copoly(arylene ether)s containing pendant sulfonic acid groups as proton exchange membranes. United States: N. p., 2009. Web.
Dae Sik, Kim, Yu Seung, Kim, Gilles, Robertson, & Guiver, Michael D. Copoly(arylene ether)s containing pendant sulfonic acid groups as proton exchange membranes. United States.
Dae Sik, Kim, Yu Seung, Kim, Gilles, Robertson, and Guiver, Michael D. Thu . "Copoly(arylene ether)s containing pendant sulfonic acid groups as proton exchange membranes". United States. https://www.osti.gov/servlets/purl/956392.
@article{osti_956392,
title = {Copoly(arylene ether)s containing pendant sulfonic acid groups as proton exchange membranes},
author = {Dae Sik, Kim and Yu Seung, Kim and Gilles, Robertson and Guiver, Michael D},
abstractNote = {A copoly(arylene ether) (PAE) with high fluorine content and a copoly(arylene ether nitrile) (PAEN) with high nitrile content, each containing pendant phenyl sulfonic acids were synthesized. The PAE and P AEN were prepared from decafluorobiphenyl (DFBP) and difluorobenzonitrile (DFBN) respectively, by polycondensation with 2phenylhydroquinone (PHQ) by conventional aromatic nucleophilic substitution reactions. sulfonic acid groups were introduced by mild post-sulfonation exclusively on the para-position of the pendant phenyl ring in PHQ. The membrane properties of the resulting sulfonated copolymers sPAE and sPAEN were compared for fuel cell applications. The copolymers sPAE and sPAEN, each having a degree of sulfonation (OS) of 1.0 had high ion exchange capacities (IEC{sub v})(wet) (volume-based, wet state) of 1.77 and 2.55 meq./cm3, high proton conductivities of 135.4 and 140.1 mS/cm at 80 C, and acceptable volume-based water uptake of 44.5 -51.9 vol% at 80 C, respectively, compared to Nafion. The data points of these copolymer membranes are located in the upper left-hand corner in the trade-off plot of alternative hydrocarbon polyelectrolyte membranes (PEM) for the relationship between proton conductivity versus water uptake (weight based or volume based), i.e., high proton conductivity and low water uptake. Furthermore, the relative selectivity derived from proton conductivity and methanol permeability is higher than that of Nafion.},
doi = {},
journal = {Macromolecules},
number = ,
volume = ,
place = {United States},
year = {2009},
month = {1}
}