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http://dx.doi.org/10.9713/kcer.2012.50.1.088

Recycling of Crosslinked Polypropylene and Crosslinked Polyethylene in Supercritical Methanol  

Lee, Hong-Shik (School of Chemical and Biological Engineering, Seoul National University)
Jeong, Ju Hyeong (School of Chemical and Biological Engineering, Seoul National University)
Hong, Soon Man (Korea Institute of Science and Technology)
Koo, Chong Min (Korea Institute of Science and Technology)
Cho, Hang-Kyu (Korea Institute of Science and Technology)
Lee, Youn-Woo (School of Chemical and Biological Engineering, Seoul National University)
Publication Information
Korean Chemical Engineering Research / v.50, no.1, 2012 , pp. 88-92 More about this Journal
Abstract
Decrosslinking of crosslinked polypropylene(XLPP) in supercritical methanol was investigated compared with that of crosslinked polyethylene(XLPE). Effect of reaction temperature and initial gel contents was studied using a batch reactor. Gel contents of samples before and after reaction were measured for quantitative analysis. As reaction temperature and initial gel contents increased, the decrosslinking rate increased. The rate of decrosslinking reaction is dependent linearly on the gel contents. Experimental results indicated that the decrosslinking of XLPP was faster than that of XLPE, and it was confirmed quantitatively by the calculation of kinetic constants. In conclusion, it is considered that XLPP has better recyclability than XLPE.
Keywords
Crosslinked Polypropylene; Crosslinked Polyethlene; Supercritical; Decrosslinking; Recycling;
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