Crystallinity 1 Densifications 1 Domain structure 1 Elastomers 1 Elongation 1 Elongation ratio 1 Hard segments 1 Heat elongation 1 High-strength 1 Polyurethane films Polyurethanes 1 Reinforced plastics 1 Small angle X-ray scattering 1 Stacked domain structure 1 Thermoplastic polyurethanes 1 X ray scattering 1 heat elongation 1 polyurethane 1 small-angle X-ray scattering 1 stacked domain structure 1 tensile property 1