Crystallization of hard segments in MDI/BD-based polyurethanes deformed at elevated temperature and their dependence on the MDI/BD content

摘要

Graphical abstractDisplay OmittedHighlights?Strain-induced crystallization of amorphous hard segments of TPU with low HSC is proposed.?Para-crystalline hard segments of TPU with high HSC transform into form III of MDI/BD modifications.?Formed microfibrils exhibit lateral periodic correlation.?Thickness of hard domain can be elongated at 100?°C.AbstractMorphological variation of thermoplastic polyurethanes (TPUs) with different hard segment contents (HSCs) stretched at 100?°C higher than theTgof hard domain was monitored by in-situ wide-angle X-ray scatteri