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Usefulness of Fourier Transform Infrared Spectroscopy in the Analysis of Evolved Gas from the Thermogravimetric Technique Pages: 13 Published: Jan 1988
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View License Agreement The usefulness of thermogravimetry has been amply demonstrated for a wide variety of analytical applications. However, in many instances, additional information is required for adequate characterization of the sample and its thermal decomposition behavior. In this respect, the analyses of evolved gases or condensed liquids has been proven a highly useful approach. Among the various physical methods used for the analyses of thermal degradation products, infrared spectroscopy has often been found very powerful, because it is versatile, rapid, and accessible. In this study, we report a simple and new approach to recover evolved gases and condensed liquids after the thermal degradation of fibrous organic materials, using an infrared gas cell and a polyvinyl chloride (PVC) membrane filter, respectively. The gaseous components were analyzed by transmission Fourier transform infrared (FTIR) and the condensed liquids products were examined directly on the PVC membrane by FTIR in the internal mode. For that purpose, several types of synthetic fibers have been selected: polyvinyl alcohol, polyacrylonitrile, polyaramids, and polyolefins. The decomposition products from the combustion of the organic fibers, both in the presence and absence of oxygen, are discussed. | ||
