Effect of Copolymer Composition on the Oxygen Transport Properties of Sulfonated Poly(arylene ether sulfone) and Sulfonated Poly(sulfide sulfone) PEMs
نویسندگان
چکیده
Mass transport properties were investigated by means of the chronoamperometry method for a series of sulfonated poly~arylene ether sulfone! ~SPES! membranes and sulfonated polysulfide sulfone ~SPSS! polymers of various ion exchange capacities ~IEC! at a Pt ~microelectrode!/proton exchange membrane ~PEM! interface. The temperature and pressure dependence of oxygen transport parameters show similar trends for the SPES 30-60 sIEC = 1.2-2.2 meq g−1d and SPSS 20-50 sIEC = 0.7-1.8 meq g−1d membranes. The diffusion coefficient was found to increase with the IEC while solubility decreases. The results are discussed in the context of water/polymer interactions and morphology-facilitated mass transport characteristics. © 2005 The Electrochemical Society. @DOI: 10.1149/1.1896529# All rights reserved.
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