Journal
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
Volume 86, Issue 1, Pages 233-238Publisher
ELSEVIER
DOI: 10.1016/j.jaap.2009.06.010
Keywords
Pyrolysis; Gas chromatography mass spectrometry; TGA; Poly(vinyl phenyl ketone); Ink
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The thermal decomposition process and pyrolysis products of poly(vinyl phenyl ketone) (PVPK) were investigated by thermogravimetric analysis (TGA) and on-line pyrolysis-gas chromatography-mass spectrometry (Py-CC-MS). TGA showed a largest weight loss rate around 380 degrees C. Py-GC-MS was used for the qualitative analysis of the pyrolysis products at 350, 500, 600, 700 and 850 degrees C. The major volatile thermal decomposition product was found to be 1-phenyl-2-propenone, which dominated all other volatile species especially under the least severe pyrolysis conditions (<600 degrees C). At higher temperatures a much wider range of pyrolysis products was obtained. The results have been interpreted assuming that primary random chain scission reactions occur followed by typical unzipping mainly producing monomer units; detachment of the side-group occurs only under more severe pyrolysis conditions. PyGC-MS showed to be effective in PVPK detection in ink and paint formulations. (C) 2009 Elsevier B.V. All rights reserved.
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