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

Title
Decrosslinking reaction kinetics of silane-crosslinked polyethylene in sub- and supercritical fluids
Author
김성훈
Keywords
Silane-crosslinked polyethylene; Supercritical fluids; Decrosslinking; Continuous process; Kinetics; Recycling
Issue Date
2016-05
Publisher
ELSEVIER SCI LTD
Citation
POLYMER DEGRADATION AND STABILITY, v. 130, Page. 103-108
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 degrees 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. (C) 2016 Elsevier Ltd. All rights reserved.
URI
https://www.sciencedirect.com/science/article/pii/S0141391016301550?via%3Dihubhttp://hdl.handle.net/20.500.11754/64699
ISSN
0141-3910; 1873-2321
DOI
10.1016/j.polymdegradstab.2016.05.025
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ORGANIC AND NANO ENGINEERING(유기나노공학과) > Articles
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