Abstract
Small-angle X-ray scattering and differential scanning calorimetry were used to study the morphology in segmented polyester-based polyurethanes with 4,4′-methylene bis(phenyl isocyanate) and butanediol as hard segment. The polyesters with various mole ratios of -CH 3 side chain were synthesized from adipic acid and glycols which were mixtures of various mole ratios of hexanediol and 1,2-propanediol. The effect of -CH 3 side-chain content in polyesters on the phase segregation of soft- and hard-segments of polyurethanes at two annealing temperatures, i.e. 25 and 87°C, was observed. © 1998 Elsevier Science Ltd. All rights reserved.