Microphase-separated structure and mechanical properties of novel polyurethane elastomers prepared with ether based diisocyanate

摘要

A diisocyanate baring ether bonds,1,2-bis(isocyanate)ethoxyethane (TEGDI),was used for the preparation of polyurethane elastomers (PUEs).The PUEs were synthesized with either TEGDI or HDI,poly(oxytetramethylene) glycol (PTMG),and curing agents by a prepolymer method.1,6-Hexamethylene diisocyanate (HDI) was also used as a control diisocyanate.The TEGDI-based PUEs exhibited highly softened property on account of flexibility of TEGDI itself and weaker phase separation.Another TEGDI-based PUEs were prepared with either poly(oxypropylene) glycol (PPG) or poly(caprolactone) glycol (PCL).Microphase-separated structure of these TEGDI-based PUEs are quite different from those with general diisocyanates and the PUEs were made be greatly softened.