Abstract
A random ionomer, partially (less than 4 mol %) sulfonated polystyrene (SPS) (Na salt), dissolved in DMF was investigated. For high molecular weight ionomers (MW: 200 000 and 400 000), the (effective) diffusion coefficient, D eff , obtained from the methods of cumulants, increases significantly with polymer (ionomer) concentration and bends over at high ionomer concentration. The D eff increases with ion content of the ionomers at fixed polymer concentration
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