Synthesis of biodegradable polycaprolactone/polyurethane by curing with H 2 O

摘要: To prepare a pre-polymer in this study, the following materials were used: 4,4′-diphenylmethane diisocyanate, poly(e-caprolactone) diol (PCL), and polytetramethylene ether glycol. The was then cured using H2O to form new type of polyurethane (PU), PCL/H2O-PU. Fourier transform infrared analysis confirmed successful synthesis Results from thermal gravimetric analysis, differential scanning calorimetry, dynamic mechanical showed that resistance glass transition temperature PCL/H2O-PU increased with hard segment content. Stress–strain curves for specimens increasing content, tensile strength Young’s modulus increased, but elongation at break decreased. WAXD patterns indicated higher polymer chains more ordered arrangement, although morphology still amorphous. degree swelling an aqueous ethanol solution hydrolytic degradation rate PCL Scanning electron microscopic images during period, original wrinkled surface became smooth, cracks formed. severe when temperature.