Thermal polymerisation and autoxidation of technical grade linoleic acid

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Abstract

Oligomerisation of technical grade linoleic acid was studied over a broad temperature range. Effects of water and air were specifically addressed. The products were analysed by size-exclusion chromatography to give directly the concentrations of dimers and trimers. Oligomerisation of technical grade linoleic acid was seen to be dependent on temperature and the activation energy for monomer disappearance was 109 kJ/mol. A phenomenological kinetic model was proposed for the linoleic acid oligomerisation giving good model predictions. The presence of water inhibited the oligomerisation reaction. Extensive dimerisation and trimerisation occurred under a continuous air flow, whereas introduction of air pulses resulted in only a minor enhancement of trimerisation.

Original languageEnglish
Pages (from-to)567-572
Number of pages6
JournalJAOCS, Journal of the American Oil Chemists' Society
Volume85
Issue number6
DOIs
Publication statusPublished - Jun 2008
MoE publication typeA1 Journal article-refereed

Keywords

  • Autoxidation
  • Linoleic acid
  • Polymerisation

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