ISSN: 0256-1115 (print version) ISSN: 1975-7220 (electronic version)
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In relation to this article, we declare that there is no conflict of interest.
Publication history
Received August 30, 2023
Accepted December 29, 2023
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Preparation of De-crosslinked Polyethylene from Waste Crosslinked High-Density Polyethylene Using Supercritical Twin-Screw Extrusion

Department of Mechanical Engineering , Gachon University
hskim70@gachon.ac.kr
Korean Journal of Chemical Engineering, June 2024, 41(6), 1767-1773(7), https://doi.org/10.1007/s11814-023-00010-3

Abstract

This study examined a method for de-crosslinking high-density polyethylene (HDPE) for use in heating pipes using supercritical

fl uids and recycling them into polyethylene. Waste crosslinked HDPE is mostly incinerated because it is a thermosetting

plastic and cannot be recycled. Therefore, there is an urgent need to develop new recycling technologies for crosslinked

HDPE to prevent environmental pollution. Many experiments have been conducted under various subcritical and supercritical

conditions using methanol as the supercritical solvent to recycle crosslinked HDPE. Consequently, PE can be prepared via

a de-crosslinking reaction. To recycle crosslinked high-density polyethylene, we conducted experiments at three rotational

speeds (80, 250, and 400 rpm) of the screw under the conditions of various temperatures (300–360

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