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THERMOGRAVIMETRIC ANALYSIS/FOURIER TRANSFORM-INFRARED SPECTROSCOPY

 

Mettler Toledo TGA/DSC 1

Thermo Gravimetrical Analysis (see TGA) combined with FT-IR spectrometry(see FT-IR) is a hyphenated thermal analytical technique where volatiles released from a thermobalance (TGA) are transferred through a heated transfer line to a heated cell (200°C) inside a FT-IR spectrometer which acts as detector.
During the TGA experiment, interferograms are continuously recorded as function of temperature (time) which can be transformed to FT-IR spectra.  FT-IR spectra allow correlating functional groups of the released volatiles with specific mass loss from the thermobalance within dedicated temperature ranges.  This hyphenated technique gives information on the stability and degradation mechanisms of a material.  TGA/FT-IR analysis can be obtained in an inert (He, N2) atmosphere or an oxidative environment (air, O2).

Typical applications

  • On-line study of the thermal and thermo-oxidative stability of materials.
  • On-line study of thermal and thermo-oxidative degradation mechanisms of materials.
  • Simulation experiments of thermal process with identification of released components (EGA).