Standard Test Method for Thermal Stability by Thermogravimetry

Importancia y uso:

5.1 Thermogravimetry provides a rapid method for determining the thermal decomposition and reaction mass change of a material.

5.2 This test method is useful in detecting potentially hazardous reactions and in estimating the temperatures at which these reactions occur. This test method is recommended as a screening test for detecting the thermal hazards of an uncharacterized material or mixture (see Section 8).

5.3 Energetic materials, pharmaceuticals and polymers are examples of materials for which this test might be useful. This test is especially useful for materials having melting points that overlap with the onset of reaction or decomposition.

Note 1: In differential scanning calorimetry (DSC), the melting endotherm may interfere with the determination of the onset temperature for reaction or decomposition.

5.4 This test is not suitable for materials that sublime or vaporize in the temperature range of interest. A sample with volatile impurities needs to be purified prior to testing by thermogravimetric analysis. Alternatively, the sample can be tested as is, however, special caution is required during the data analysis. The mass loss due to the loss of impurity should not interfere with the determination of reaction or decomposition temperature.

5.5 The four significant criteria of this test method are: the detection of a sample mass change; the extent of the mass change; the approximate temperature at which the event occurs; the observance of effects due to the atmosphere.

Subcomité:

E37.01

Referida por:

E2958-21, E1877-21

Volúmen:

14.01

Número ICS:

17.200.99 (Other standards related to thermodynamics)

Palabras clave:

thermal analysis; thermal decomposition; thermal stability; thermogravimetric analysis; thermogravimetry;