Continuous supercritical decrosslinking extrusion process for recycling of crosslinked polyethylene waste

Bum Ki Baek, Ji Wook Shin, Jun Yong Jung, Soon Man Hong, Gi Joon Nam, Haksoo Han, Chong Min Koo

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8 Citations (Scopus)

Abstract

This work demonstrates that extrusion process can be used as a continuous reactor for the recycling of crosslinked polyethylene (XLPE) via supercritical methanol decrosslinking reaction. The multistage single screw extruder (L/D = 36, D = 40 mm) with methanol injection pump was customized for the continuous supercritical decrosslinking reaction. Reaction temperature was ranged from 360C to 390C. The amount of methanol was varied from 0 to 7 mL/min. The extruder provided the crosslinked polymers with the supercritical conditions of methanol during continuous process. The gel content of XLPE decreased with the increase in the reaction temperature and methanol content. Although XLPE experienced supercritical methanol for less than 2 min retention time in the continuous supercritical extruder, it was completely decrosslinked above 390C at the methanol feeding rate of 7 mL/min.

Original languageEnglish
Article number41442
JournalJournal of Applied Polymer Science
Volume132
Issue number6
DOIs
Publication statusPublished - 2015 Feb 1

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All Science Journal Classification (ASJC) codes

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

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