Thermal analysis of a polyethylene glycol (PEG 4000): T-CR-T diagram construction

A modified isoconversional method is applied to perform the kinetic analysi s of non-isothermal processes. The solidification process of a polyethylene glycol with a mean molecular of 4000 (PEG 4000) was here analyzed. It was stated that the Avrami model provides a good description of the solidificat ion process. Temperature-cooling rate-transformation diagrams were constructed and there was a good agreement between experimental data and the calculated T-CR-T c urves. Moreover, morphological qualitative analysis has been performed by m eans of scanning electron microscopy.