Abstract
The applicability of the kinetic analysis of data obtained by non-isothermal differential scanning calorimetry (DSC) is discussed. The Johnson-Mehl-Avrami (JMA) model was used for the computer simulation of DSC traces subsequently analysed by common methods of kinetic analysis of non-isothermal data. For the temperature-independent kinetic exponent n of the JMA equation, the kinetic analysis was shown to provide correct results, e.g. a correct kinetic model and apparent activation energy. On the other hand, for the temperature-dependent kinetic exponent, there is a great possibility of erroneous determination of the correct kinetic model and apparent activation energy, especially at higher heating rates. Since the temperature dependence of n cannot be determined on the basis of non-isothermal DSC experiments, conclusions must be drawn with appropriate caution.
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Holubová, J., Černošek, Z. & Černošková, E. Kinetic Analysis of Non-isothermal DSC Data. Computer-aided test of its applicability. Journal of Thermal Analysis and Calorimetry 62, 715–719 (2000). https://doi.org/10.1023/A:1012077525661
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DOI: https://doi.org/10.1023/A:1012077525661