Dechlorination behaviour of flexible poly(vinyl chloride) in NaOH/EG solution

Toshiaki Yoshioka, Tomohito Kameda, Masashi Ieshige, Akitsugu Okuwaki

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54 Citations (Scopus)


Flexible poly(vinyl chloride) (PVC) was found to be dechlorinated in NaOH/ethylene glycol (EG) solution at moderate temperature and at atmospheric pressure. The degree of dechlorination increased over time with all particle sizes and with decreasing particle size. Decreased particle size resulted in an increased effective surface area, increasing the contact between the material and OH- in the NaOH/EG solution, which contributed to the high degree of dechlorination. The dechlorination of flexible PVC in NaOH/EG solution was expressed as a first-order reaction and proceeded under chemical reaction control. Diisononyl-phthalate (DINP) in the flexible PVC powder decomposed readily into phthalic acid and isononyl alcohol in a short time. For the dechlorination of the flexible PVC, the substitution (SN2) of chloride by the hydroxyl group was considered to be preferential to the elimination (E2) of hydrogen chloride.

Original languageEnglish
Pages (from-to)1822-1825
Number of pages4
JournalPolymer Degradation and Stability
Issue number10
Publication statusPublished - 2008 Oct


  • Apparent activation energy
  • Apparent rate constant
  • Dechlorination
  • Flexible poly(vinyl chloride)
  • NaOH/EG solution


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