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.
|Number of pages||6|
|Journal||Polymer Degradation and Stability|
|Publication status||Published - 2016 Aug 1|
Bibliographical noteFunding Information:
This study was supported by R&D Center for Valuable Recycling (Global-Top R&BD Program) of the 1) Ministry of Environment (Project No. GT-11-C-01-240-0 ) and by grants from the Fundamental R&D Program for Core Technology of Materials and the Industrial Strategic Technology Development Program funded by 2) Ministry of Knowledge Economy , Republic of Korea. The authors also appreciate a grant from Materials Architecturing Research Center of 3) Korea Institute of Science and Technology (KIST).
© 2016 Elsevier Ltd. All rights reserved.
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Mechanics of Materials
- Polymers and Plastics
- Materials Chemistry