Decrosslinking reaction kinetics of silane-crosslinked polyethylene in sub- and supercritical fluids

Bum Ki Baek, Yun Ho La, Albert S. Lee, Haksoo Han, Seong Hun Kim, Soon Man Hong, Chong Min Koo

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Supercritical methanol is a popular fluid as a supercritical medium for decrosslinking reaction of crosslinked polyethylene. However, due to its toxicity, a safe alternative medium is much to be desired. In this work, various sub- and supercritical fluids with different polarity characters were investigated to find a safe alternative medium for continuous decrosslinking of silane-crosslinked polyethylene (S-XLPE). Like methanol, all examined fluids, including ethanol, propanol, and water, exhibited first-order reaction kinetics regarding the gel content in the continuous decrosslinking process. The reaction rate constant values were observed as 2.806, 2.569, 2.383, and 2.130 min-1 in supercritical methanol, supercritical ethanol, supercritical 2-propanol, and subcritical water at 380 °C, respectively. As a non-toxic fluid with reaction kinetics very comparable to that of methanol, ethanol was found to be the best alternative medium for the continuous decrosslinking reaction of S-XLPE.

Original languageEnglish
Pages (from-to)103-108
Number of pages6
JournalPolymer Degradation and Stability
Volume130
DOIs
Publication statusPublished - 2016 Aug 1
Externally publishedYes

Fingerprint

Silanes
Supercritical fluids
supercritical fluids
Polyethylene
Reaction kinetics
silanes
Methanol
Polyethylenes
polyethylenes
reaction kinetics
methyl alcohol
Ethanol
ethyl alcohol
Propanol
Fluids
fluids
1-Propanol
2-Propanol
Water
toxicity

Keywords

  • Continuous process
  • Decrosslinking
  • Kinetics
  • Recycling
  • Silane-crosslinked polyethylene
  • Supercritical fluids

ASJC Scopus subject areas

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

Cite this

Decrosslinking reaction kinetics of silane-crosslinked polyethylene in sub- and supercritical fluids. / Baek, Bum Ki; La, Yun Ho; Lee, Albert S.; Han, Haksoo; Kim, Seong Hun; Hong, Soon Man; Koo, Chong Min.

In: Polymer Degradation and Stability, Vol. 130, 01.08.2016, p. 103-108.

Research output: Contribution to journalArticle

Baek, Bum Ki ; La, Yun Ho ; Lee, Albert S. ; Han, Haksoo ; Kim, Seong Hun ; Hong, Soon Man ; Koo, Chong Min. / Decrosslinking reaction kinetics of silane-crosslinked polyethylene in sub- and supercritical fluids. In: Polymer Degradation and Stability. 2016 ; Vol. 130. pp. 103-108.
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AU - Lee, Albert S.

AU - Han, Haksoo

AU - Kim, Seong Hun

AU - Hong, Soon Man

AU - Koo, Chong Min

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