Conclusions on Calorimetry Techniques

In the early eighties, many workers preferred using the DC technique rather than the DSC calorimetry for studying the kinetics of reactions, essentially because the temperature would be supposed constant, which simplifies the kinetic study. 

In the DSC technique, some gradients of temperature are developed through the thickness of the sample, but they are not so steep as in the DC technique, and after a certain period, they become constant. Moreover, as these temperature gradients are proportional to the heating rate, they can be controlled by choosing an appropriate heating rate. 

After a few studies, among them these contribution [3,14], almost all researchers were inclined to use the calorimetry in scanning mode. 

Let us note that this question about the temperature—either to be kept constant or programmed with a constant rate used in calorimetry—is quite general for all techniques initially run under isothermal conditions. Thus, this problem arising in calorimetry will be also considered in the same way with the moving die rheometer (MDR) technique. 

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