Simultaneous Thermal Analysis

Thermogravimetry & Differential Scanning Caloriemtry

Simultaneous Thermal Analysis (STA) offers the capability to examine thermogravimetric (TG) effects while simultaneously recording a heat flow signal using Differential Scanning Calorimetry (DSC).

STA involves the concurrent application of TG and DTA/DSC analysis techniques to a single sample. This allows for a direct comparison of the results obtained from both methods. Importantly, the potential impact of alterations in sample atmospheres on reaction equilibrium, which may occur with separate measurements, is eliminated.

Example of a measurement

Decomposition of rubber in a STA (TG+DSC), pink curve is the DTA/DSC signal, blue curve is the mass loss

Additionally, Simultaneous Thermal Analysis simplifies the interpretation of measured thermal effects and enables the correction of conversion enthalpies based on weight changes.

Moreover, this approach addresses the uncertainties that can arise from separate TG and DTA/DSC measurements due to factors such as sample inhomogeneities, sample geometry, and temperature inaccuracies.

The clear association of TG and DTA/DSC outcomes facilitates a nearly comprehensive characterization of the sample, particularly for intricate reactions. This combination of information allows for the differentiation between endothermic and exothermic events that do not entail any associated weight change (e.g., melting and crystallization) and those that involve a weight change (e.g., degradation).

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