Linear segmented polyurethane electrolytes—I. morphology and physical properties

Abstract This paper describes the preparation of salt-free and salt-doped linear segmented polyurethanes and the effect of addition of alkali metal salts on the morphology and physical properties of these materials. 1 H- and 13 C-NMR, i.r., DSC, X-ray diffraction, optical microscopy and penetration measurements were used in these investigations. Variations in the effects of molecular weight of the soft block, the hard block content and the total salt content in the polymer electrolyte are reported. Correlations were observed between the degree of phase separation and the structure of the elastomers and also between the physical properties and the salt content.