Assessment of a new method for the analysis of decomposition gases of polymers by a combining thermogravimetric solid-phase extraction and thermal desorption gas chromatography mass spectrometry
| Autor: | Ulrike Braun, G. Fabian, Heinz Sturm, E. Duemichen, R. Senz |
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| Rok vydání: | 2014 |
| Předmět: |
Thermogravimetric analysis
Chromatography Polymers Chemistry Polyesters Solid Phase Extraction Organic Chemistry Chemical process of decomposition Thermal decomposition Thermal desorption Analytical chemistry Reproducibility of Results General Medicine Mass spectrometry Biochemistry Decomposition Gas Chromatography-Mass Spectrometry Analytical Chemistry Thermogravimetry Spectroscopy Fourier Transform Infrared Solid phase extraction |
| Zdroj: | Journal of Chromatography A. 1354:117-128 |
| ISSN: | 0021-9673 |
| DOI: | 10.1016/j.chroma.2014.05.057 |
| Popis: | For analysis of the gaseous thermal decomposition products of polymers, the common techniques are thermogravimetry, combined with Fourier transformed infrared spectroscopy (TGA-FTIR) and mass spectrometry (TGA-MS). These methods offer a simple approach to the decomposition mechanism, especially for small decomposition molecules. Complex spectra of gaseous mixtures are very often hard to identify because of overlapping signals. In this paper a new method is described to adsorb the decomposition products during controlled conditions in TGA on solid-phase extraction (SPE) material: twisters. Subsequently the twisters were analysed with thermal desorption gas chromatography mass spectrometry (TDS-GC-MS), which allows the decomposition products to be separated and identified using an MS library. The thermoplastics polyamide 66 (PA 66) and polybutylene terephthalate (PBT) were used as example polymers. The influence of the sample mass and of the purge gas flow during the decomposition process was investigated in TGA. The advantages and limitations of the method were presented in comparison to the common analysis techniques, TGA-FTIR and TGA-MS. |
| Databáze: | OpenAIRE |
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