Abstract
The effect of pendant-anion type (sulfonate or carboxylate), polyol type (PEG, PPG, PTMG), and polyol molecular weight on the morphology of model polyurethane ionomers was studied. Analysis of the SAXS data with a liquidlike hard-sphere model revealed that the carboxylated ionomers had lower degrees of phase separation, larger aggregate sizes, and lower aggregate number densities than their sulfonated analogues. Polyol type and polyol molecular weight affected carboxylated and sulfonated ionomers similarly. Evaluation of new models of ionomer morphology for analysis of SAXS data revealed that two of the three models were inadequate
Published Version
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