Continuous Supercritical Decrosslinking Extrusion Process for Recycling of Crosslinked Polyethylene Waste

Title
Continuous Supercritical Decrosslinking Extrusion Process for Recycling of Crosslinked Polyethylene Waste
Authors
백범기신지욱정준영홍순만남기준한학수구종민
Keywords
crosslinking; degradation; polyolefins; thermosets; viscosity and viscoelasticity
Issue Date
2015-02
Publisher
Journal of applied polymer science
Citation
VOL 132, NO 6, 41442(1of7)-0
Abstract
This work demonstrates that extrusion process can be used as a continuous reactor for the recycling of crosslinked polyethylene (XLPE) via supercritical methanol decrosslinking reaction. The multistage single screw extruder (L/D = 36, D = 40 mm) with methanol injection pump was customized for the continuous supercritical decrosslinking reaction. Reaction temperature was ranged from 360°C to 390°C. The amount of methanol was varied from 0 to 7 mL/min. The extruder provided the crosslinked polymers with the supercritical conditions of methanol during continuous process. The gel content of XLPE decreased with the increase in the reaction temperature and methanol content. Although XLPE experienced supercritical methanol for less than 2 min retention time in the continuous supercritical extruder, it was completely decrosslinked above 390°C at the methanol feeding rate of 7 mL/min
URI
http://pubs.kist.re.kr/handle/201004/49765
ISSN
00218995
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KIST Publication > Article
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