Thermal Stabilities and the Thermal Degradation Kinetics of Poly(epsilon-Caprolactone)

摘要

The thermal degradation behavior of poly(epsilon-caprolactone)(PCL)in nitrogen atmosphere was investigated by thermogravimetric analysis(TGA),differential scanning calorimetry(DSC)techniques and Fourier Transform Infrared(FTIR)spectroscopy.TGA/DTG/DSC curves display only one main degradation step.TGA/FTIR results indicate PCL decomposes into CO2 and hexanoic acid before 500°C.The activation energies were estimated by iterative isocon-versional procedure.Friedman plot indicates a change in degradation mechanism.The differential method and integral method were used to confirm the exact kinetic mechanism.The best models are Dn(n=1,2,3,and 4)when 0.08