A novel approach for determining the proportions of pyrolysis and hydrolysis in the degradation of poly(ethylene terephthalate) in 18O-labeled steam

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Abstract

The proportions of pyrolysis and hydrolysis in poly(ethylene terephthalate) (PET) degradation were determined from the decomposition of PET in 18O-labeled steam, producing labeled and unlabeled terephthalic acid. At a 100 vol % steam concentration at 400 °C, 74% of the ester bonds were pyrolyzed and 26% were hydrolyzed, as determined by gas chromatographymass spectrometry. In addition, thermogravimetric analysis revealed the activation energy to be 199 kJ mol-1 under pyrolytic conditions, decreasing with increasing steam concentration, and reaching a minimum of 132kJmol-1 at 75vol %.

Original languageEnglish
Pages (from-to)212-214
Number of pages3
JournalChemistry Letters
Volume42
Issue number3
DOIs
Publication statusPublished - 2013

ASJC Scopus subject areas

  • Chemistry(all)

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