Effect of metals, metal oxides, and carboxylates on the thermal decomposition processes of poly(vinyl chloride)

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Abstract

The influence of metals, metal oxides, and carboxylates on the thermal degradation of poly(vinyl chloride) (PVC) was investigated using pyrolysis-mass spectrometry and pyrolysis-gas chromatography/mass spectrometry. Al, Zn, Fe, ferric oxide, and titanium dioxide reduced the onset temperature of dehydrochlorination by weakening the C-Cl bonds in PVC. Benzene formation was hindered by the studied metals, oxides, and carboxylates as long as they were forming chlorides with HCl. The promotion of benzene evolution in alumina was assumed to be the result of a facilitated hydrogen exchange on the oxide surface which was necessary for the detachment of benzene from a dehydrochlorinated PVC segment.

Original languageEnglish
Pages (from-to)125-143
Number of pages19
JournalJournal of Analytical and Applied Pyrolysis
Volume49
Issue number1
DOIs
Publication statusPublished - Feb 1999
EventProceedings of the 1998 13th International Symposium on Analiyical and Applied Pyrolysis, PYROLYSIS-98 - Munich, DEU
Duration: May 18 1999May 20 1999

ASJC Scopus subject areas

  • Analytical Chemistry
  • Fuel Technology

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