Dechlorination of poly(vinyl chloride) by microwave irradiation I: A simple examination using a commercial microwave oven

M. Ito, K. Ushida, N. Nakao, N. Kikuchi, R. Nozaki, K. Asai, M. Washio

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

Poly(vinyl chloride) (PVC) was decomposed by microwave (MW) irradiation (2.45 GHz) using a commercial MW oven. The efficiency of dielectric absorption was evaluated quantitatively from the rate of temperature increase on MW irradiation. The efficiency of dielectric heating increased at temperatures above the glass transition temperature (Tg). The decomposition on MW irradiation, monitored using the weight, depended on the initial (preheating) temperature of the sample before irradiation. The degradation time profile with various initial temperatures was shifted along the time axis and was successfully superimposed on a single curve. A pure PVC film was subjected to heating at a constant temperature from 230 °C to 310 °C, and the rate of weight decrease on heating was measured. The apparent activation energy was 84.4 kJ/mol for a single monomer unit.

Original languageEnglish
Pages (from-to)1694-1700
Number of pages7
JournalPolymer Degradation and Stability
Volume91
Issue number8
DOIs
Publication statusPublished - 2006 Aug 1

Keywords

  • Dechlorination
  • Dielectric constant
  • Dielectric heating
  • Microwave
  • PVC
  • Plastic wastes

ASJC Scopus subject areas

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

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