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Abstract  

A modified isoconversional method is applied to perform the kinetic analysis 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 solidification process. Temperature-cooling rate-transformation diagrams were constructed and there was a good agreement between experimental data and the calculated T-CR-T curves. Moreover, morphological qualitative analysis has been performed by means of scanning electron microscopy.

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, the Kauzmann temperature is the lowest theoretical boundary for the glass transformation. It is clear from Eqs. 1 and 2 that at some heating rate, one can assume that T g = T cr = T k . . After solving Eqs 1 and 2 for T k

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of a polyethylene glycol (PEG 4000): T-CR-T diagram construction . J Therm Anal Calorim . 2000 ; 61 : 711 – 718 . 10.1023/A:1010120424573 . 8. Riikonen , J , Salonen , J , Lehto

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Isoconversional analysis of solid state transformations

A critical review. Part II. Complex transformations

Journal of Thermal Analysis and Calorimetry
Authors: J. Farjas and P. Roura

, Suñol , JJ . A modified method for T-CR-T diagram construction: application to polyethylene glycol . J Therm Anal Calorim . 1998 ; 52 : 765 – 772 . 10.1023/A:1010158406598 . 14

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