Thermal stability

Differential thermal analysis is used in screening to test the thermal stability of a substance or reaction mixture in a closed system in air or under a foreign gas blanket (up to 70 bar) and to determine the decomposition energy.

Thermogravimetry is used to determine the release of volatile substances during heating-up (up to 1000°C).

The adiabatic induction time TMR24h (Time to Maximum Rate 24 h) is a measure of the maximum temperature at which a substance or mixture of substances can normally be handled safely without additional safety measures. It is determined by heat accumulation tests (Dewar, VSP, ARC). In these tests, the volume of gas and its rate of evolution are also recorded. The limit temperatures obtained are directly applicable to industrial plants. To assess deflagration, the propagation rate/pressure build-up rate is measured in the open/closed vessel. Information can be gained from this on the pressure relief required in handling such substances. The explosion hazard is determined in accordance with the requirements of the German Chemicals Act (ChemG). For transport classification of highly thermally sensitive substances their SADT (Self Accelerating Decomposition Temperature) must be determined.

Our services:

• Differential thermal analysis
• Thermogravimetry
• Heat accumulation tests for determination of limiting temperature for safe operation:
  Dewar (closed / open system), VSP, ARC
• Tests on deflagration (closed / open system)
• Explosive properties
• Analysis and release rate of decomposition gases