Reparation and Characterization of Water-borne Polyurethane based on PCDL or (and) PCL Prepolymer

A series of waterborne polyurethanes (WPUs) were synthesized by a pre-polymer process from isophorone diisocyanate and polycarbonatediol (PCDL), polycaprolactone (PCL). Fourier transform infrared spectroscopy, thermal gravimetric analysis, dynamic thermomechanical analysis and mechanical measurements were employed to characterize the thermal stability, physical and mechanical properties of the films derived from the emulsions. The results show that there is better mechanical properties of and thermal stability for PCL-based WPU. The thermal stability of PCDL-PCL based WPU, whichin the mass ratio of PCDL to PCL is 1 to 1 is the best. The PCDL-based WPU has the highest glass transition temperature.