Mechanochemical dechlorination of polyvinyl chloride by co-grinding with various metal oxides

Tsuyoshi Inoue, Miyuki Miyazaki, Masataka Kamitani, Junya Kano, Fumio Saito

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)

Abstract

Polyvinyl chloride powder was ground with one of the oxide powders, i.e. CaO, Fe2O3, SiO2 and Al2O 3, in air by a planetary ball mill to investigate the mechanochemical dechlorination of PVC. Grinding causes the size reduction of the each component. The PVC powder sample is degraded by grinding with reduction of molecular weight, forming C=C bonds in its structure. The dechlorination occurs in all the ground mixtures, but its phenomenon is classified into two types. One is the solid-phase reaction to form chlorides, CaOHCl and FeCl2 · 2H2O, when CaO and Fe2O3 powders are used. The other is the release of HCl gas by degradation when SiO2 and Al2O3 powders are used. All the same, the dechlorination yield increases not only with an increase in grinding time, but also with excess of oxide powder.

Original languageEnglish
Pages (from-to)215-225
Number of pages11
JournalAdvanced Powder Technology
Volume15
Issue number2
DOIs
Publication statusPublished - 2004 Jan 1

Keywords

  • Dechlorination
  • Degradation
  • Grinding
  • Oxide
  • Polyvinyl chloride

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Mechanics of Materials

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