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

Research output: Contribution to journalArticle

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
Externally publishedYes

Fingerprint

Polyethylene
Extrusion
Methanol
Polyethylenes
Recycling
Extruders
Polymers
Gels
Pumps
Temperature

Keywords

  • crosslinking
  • degradation
  • polyolefins
  • thermosets
  • viscosity and viscoelasticity

ASJC Scopus subject areas

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

Cite this

Continuous supercritical decrosslinking extrusion process for recycling of crosslinked polyethylene waste. / Baek, Bum Ki; Shin, Ji Wook; Jung, Jun Yong; Hong, Soon Man; Nam, Gi Joon; Han, Haksoo; Koo, Chong Min.

In: Journal of Applied Polymer Science, Vol. 132, No. 6, 41442, 01.02.2015.

Research output: Contribution to journalArticle

Baek, Bum Ki ; Shin, Ji Wook ; Jung, Jun Yong ; Hong, Soon Man ; Nam, Gi Joon ; Han, Haksoo ; Koo, Chong Min. / Continuous supercritical decrosslinking extrusion process for recycling of crosslinked polyethylene waste. In: Journal of Applied Polymer Science. 2015 ; Vol. 132, No. 6.
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