Polyurethane-Urea Anionomer Dispersions. II

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Abstract
Polyurethane-urea anionomer dispersions containing about 50% hard segments were prepared from poly(oxypropylene) glycols, toluene diisocyanate (TDI), or a mixture of TDI and polymeric MDI (PMDI), dimethylolpropionic acid (DMPA), 1,4-butanediol (BD), and different diamines as chain extenders. The structure-properties relationships of these polyurethane-urea anionomers were studied. The effects of compositional ratio, type of chain extender, and isocyanate structure on the morphology and properties of the dispersion-cast films were investigated by means of differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), and determination of mechanical properties.