POLYURETHANE UREA ANIONOMER DISPERSIONS .1.

Polyurethane-urea anionomer dispersions with different stoichiometric DMPA/polyol and NCO/OH ratios were prepared from poly(oxypropylene)gly col, toluene diisocyanate (TDI), dimethylolpropionic acid (DMPA), and ethylenediamine (EDA). The dispersion-cast films were prepared and cha racterized by mechanical properties, dynamic mechanical analysis (DMA) , and differential scanning calorimetry (DSC). Increasing the hard-seg ment content by either increasing the DMPA/polyol or the NCO/OH ratios affects the glass transition temperature (T-g) of the soft segments. (C) 1994 John Wiley and Sons, Inc.