Thermogravimetry thermogram

Thermogravimetry The products of a thermal decomposition can be deduced by monitoring the sample s mass as a function of applied temperature. (Figure 8.9). The loss of a volatile gas on thermal decomposition is indicated by a step in the thermogram. As shown in Example 8.4, the change in mass at each step in a thermogram can be used to identify both the volatilized species and the solid residue. 

Use of thermogravimetry to facilitate interpretation of differential scanning calorimetry thermograms... 

The differential calorimetric curves (DSC) of the various crystalline forms of triamterene grown from organic solutions containing water and from absolute organic solutions, and the DSC curves of triamterene crystals dried under reduced pressure have been described. The differential thermal analysis-thermogravimetry analysis (DTA-TG) thermograms are also given. 

FIGURES Differential scanning calorimetry (lower trace) and thermogravimetry (upper trace) thermograms obtained for the dihydrate phase of magnesium stearate. The data were adapted from reference 54. 

Thermogravimetry has been used in many attempts to determine the mechanisms of the thermal depolymerization of silicone polymers151,155,156,163,164. A typical thermogram shows a single stage in the trace which is interpreted as the occurrence of a single... 

In polymer studies, thermograms provide information about decomposition mechanisms for various polymeric preparations. In addition, the decomposition patterns are characteristic for each kind of polymer and can sometimes be used for identification purposes. Figure 31-3 shows decomposition patterns for five polymers obtained by thermogravimetry. 

In thermogravimetry, the mass of a sample, or the change in its mass is monitored as a function of temperature or time and displayed in a thermogram. Either the temperature is varied in a controlled manner and a mass/temperature thermogram is obtained, or in isothermal studies, the temperature is kept constant and the mass/time plot is displayed. The loss of mass results from the loss of volatile or gaseous products whereas a mass... 

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