Journal of Thermal Analysis and Calorimetry

, Volume 76, Issue 1, pp 123-132

First online:

Isoconversional methods

  • P. ŠimonAffiliated withDepartment of Physical Chemistry, Faculty of Chemical and Food Technology, Slovak University of Technology Email author 

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In this paper, fundamentals of the isoconversional methods are summarized and the methods are analyzed from the point of view of their correctness, their applications and the physical meaning of the activation parameters obtained. It is concluded that the activation parameters represent apparent quantities without a mechanistic interpretation. The parameters cannot be used for any theoretical considerations; however, they enable modelling the processes for other temperature regimes than those applied in the measurements. The differential and incremental isoconversional methods give the actual values of activation parameters whereas the isothermal and integral isoconversional methods provide the averaged values. For the modelling, the activation parameters obtained from the treatment of non-transformed kinetic data should be used.

isoconversional methods kinetics modelling solid-state processes