Thermogravimetric Analysis according to ISO 11358-1

heating plastic
Testing lab
Plastic characterization
Testing standard

ISO 11358-1

TGA

Principle

TGA is an analytical method that measures the changes in weight of a test sample during a heating process.

Testing procedure

  • A sample (5 à 10 mg) is placed on a fireproof tray.
  • The tray is placed on a balance in an oven. A thermocouple is put aside the tray and logs the temperature. The weight of the tray is measured in function of the temperature in the oven or the residence time.
  • The temperature typically rises to 900°C. The oven can be flushed with pure Nitrogen to prevent oxidation of the sample material.
  • The result of the test is weight reduction due to decomposition or evaporation.
  • The weight changes often indicate which materials decompose or evaporate. The temperatures to provoke these occurences are typical for certain components in a plastic matrix.

Testing applications

  • Determination of the thermal stability or thermal degradation of a material
  • Comparative measurement of a formulation

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