Methodological problems
Differential scanning calorimetry with modulated temperature (TMDSC)

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Methodological problems


Differential scanning calorimetry with modulated temperature (TMDSC)

Authors : Jean GRENET, Bernard LEGENDRE

Publication date: March 10, 2011, Review date: September 13, 2019 | Lire en français

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3. Methodological problems

3.1 Phase correction

The previous calculation scheme may lead to erroneous results, as the basic equation (1) and the previous scheme assume a zero phase shift between the thermal response and the modulated excitation signal q (t ) in the absence of kinetic phenomena. This assumption is not entirely accurate: the phase shift between the two experimental signals is due to the time required for heat exchange between the DSC cell and the sample itself (non-exhaustively, this includes the geometry and symmetry of the cell, the cup/support pair, the cup/sample pair) (figure...

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