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Decrosslinking of Cross-linked Polyethylene using Supercritical Methanol  

Hong, Soon Man (Polymer Hybrids Research Center, Korea Institute of Science and Technology)
Cho, Hang-kyu (Polymer Hybrids Research Center, Korea Institute of Science and Technology)
Koo, Chong Min (Polymer Hybrids Research Center, Korea Institute of Science and Technology)
Lee, Jang Hoon (Youngbo Chemical Co. Ltd.)
Park, Wan Yong (Youngbo Chemical Co. Ltd.)
Lee, Hong-Shik (School of Chemical and Biological Engineering & Institute of Chemical Processes, Seoul National University)
Lee, Youn-Woo (School of Chemical and Biological Engineering & Institute of Chemical Processes, Seoul National University)
Publication Information
Korean Chemical Engineering Research / v.46, no.1, 2008 , pp. 63-68 More about this Journal
Abstract
We investigated the recycling method to re-plasticize cross-linked polyethylene by using supercritical methanol. The cross-linked polyethylene is successfully fragmented to thermoplasticized polyethylene with little degradation reactions in supercritical fluids. The thermo-plasticization reaction was accelerated with increase in temperature in the range from $360^{\circ}C$ to $400^{\circ}C$, resulting in decrease in crosslinking density, molecular weight and mechanical properties. However, the thermoplasticized polyethylene at $360^{\circ}C$ showed comparable tensile strength and impact strength with a raw resin of crosslinked polyethylene. Chemical structure of main chain of polyethylene was not affected by reaction condition.
Keywords
Crosslinked Polyethylene; Recycling; Supercritical Fluids;
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Times Cited By KSCI : 2  (Citation Analysis)
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