Dehydrochlorination behavior of flexible PVC pellets in NaOH solutions at elevated temperature

Shun Myung Shin, T. Yoshioka, A. Okuwaki

Research output: Contribution to journalArticlepeer-review

33 Citations (Scopus)


Flexible PVC pellets were treated at 150-250°C in 0-7M NaOH solutions for 0-12 h. The degree of dehydrochlorination of flexible PVC pellets increased with increasing reaction temperature and was about 100% at 250°C over 5 h. A porous char, 2-16 μm pore size, was produced. The dehydrochlorination of PVC in the flexible PVC was proceeded by a first-order reaction in alkaline solution. The maximum rate of the dehydrochlorination for flexible PVC was reached at 5M NaOH. The apparent activation energies were 22-35 kcal/mol in 1-7M NaOH for flexible PVC.

Original languageEnglish
Pages (from-to)2171-2177
Number of pages7
JournalJournal of Applied Polymer Science
Issue number13
Publication statusPublished - 1998 Mar 28


  • Alkaline solution
  • Dehydrochlorination
  • First-order reaction
  • Flexible PVC
  • Porous char

ASJC Scopus subject areas

  • Chemistry(all)
  • Surfaces, Coatings and Films
  • Polymers and Plastics
  • Materials Chemistry


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