Dechlorination of poly(vinyl chloride) using NaOH in ethylene glycol under atmospheric pressure

Toshiaki Yoshioka, Tomohito Kameda, Shogo Imai, Akitsugu Okuwaki

Research output: Contribution to journalArticle

45 Citations (Scopus)

Abstract

A solution of NaOH dissolved in ethylene glycol (EG) was effective in the dechlorination of poly(vinyl chloride) (PVC) at atmospheric pressure. The degree of dechlorination increased with increasing temperature, reaching a maximum of 97.8% at 190 °C. The dechlorination proceeded under chemical control and exhibited first-order kinetics with an apparent activation energy of 170 kJ mol-1. The apparent rate constant for dechlorination in 1.0 M NaOH/EG was approximately 150 times greater than that in 1.0 M NaOH/H2O. In addition, dechlorination was faster at atmospheric pressure in NaOH/EG than under high pressure in NaOH/H2O. The dechlorination reaction occurs via a combination of E2 and SN2 mechanisms.

Original languageEnglish
Pages (from-to)1138-1141
Number of pages4
JournalPolymer Degradation and Stability
Volume93
Issue number6
DOIs
Publication statusPublished - 2008 Jun 1

Keywords

  • Atmospheric pressure
  • Dechlorination
  • Ethylene glycol
  • NaOH
  • Poly(vinyl chloride)
  • Reaction kinetics

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Polymers and Plastics
  • Materials Chemistry

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