Isosorbide-Based Thermoplastic Polyurethane with Different Polyols and Soft/Hard Ratios

A series of isosorbide-based thermoplastic polyurethanes (ISB-TPUs) with different soft/hard ratios have been successfully step polymerized using individual two types polycaprolactone diol (PCL) or poly (tetramethylene glycol) (PTMG) for soft segment and bio-based isosorbide (ISB) methylene diphenyl diisocyanate (MDI) hard segment, based on the similar molecular weight. The effect structure mechanical thermal properties has evaluated in terms polyol, ranging from 6/4 to 9/1 ratio values. With increasing PCL content, ISB-TPU enhanced gradually. When range was 6/4, tensile strength achieved maximum value comparison that PTMG block. Elongation at break increased increase concentration, due superior interaction between ester groups urethane groups. obtained ISB-TPUs can be a promising resin soft, flexible, biocompatible application fields.