Abstract
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 and SPSS 20-50 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.
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