A Kinetic Study on the De-Crosslinking and Decomposition of Silane-Cross-Linked Polyethylene in Supercritical Methanol

Giyoung Hong, Soon Man Hong, Chong Min Koo, Bum Ki Baek, Hong Shik Lee, Youn Woo Lee

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

De-crosslinking of silane-cross-linked polyethylene (S-XLPE) in supercritical methanol was investigated. Changes in gel content and molecular weight with reaction temperature and reaction time were analyzed in a batch reactor, and kinetic parameters were calculated from the experimental data. The reaction time for de-crosslinking shortened as the reaction temperature increased and the complete de-crosslinking of S-XLPE was achieved at 320 °C and 20 min. The de-crosslinking rate of S-XLPE fit well with the first order reaction model. In addition, the molecular weight of de-cross-linked polyethylene (DXPE) decreased further as reaction temperature and reaction time increased when the reaction temperature exceeded 360 °C relative to that of the original polyethylene before being cross-linked. The decreasing molecular weight trend also fit well with the first order reaction model.

Original languageEnglish
Pages (from-to)11961-11965
Number of pages5
JournalIndustrial and Engineering Chemistry Research
Volume54
Issue number48
DOIs
Publication statusPublished - 2015 Dec 9
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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