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Adjustment of Heating Rate for Maximum Resolution in TG and TMA (MaxRes)

Abstract

Conventional thermogravimetric analysis (TG) uses constant heating rates to determine decomposition rates of a material and compositional analysis. Often, the decomposition steps can not be separated clearly enough due to parallel or consecutive reactions. If the reaction rates and the respective activation energies are enough different the TG resolution can be much enhanced by lowering the heating rate during the decomposition steps. The automated discrete adjustment of the heating rate is controlled by a set of parameters, such as threshold values, waiting times and rate factors. This technique, called MaxRes, allows for faster compositional analysis without loss of resolution. The same technique is also applicable to thermomechanical analysis (TMA) if time/temperature dependent events such as softening are to be separated.

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Riesen, R. Adjustment of Heating Rate for Maximum Resolution in TG and TMA (MaxRes). Journal of Thermal Analysis and Calorimetry 53, 365–374 (1998). https://doi.org/10.1023/A:1010109603273

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  • DOI: https://doi.org/10.1023/A:1010109603273

  • compositional analysis
  • event separation
  • heating rate
  • MaxRes
  • softening
  • TG
  • TMA