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Depolymerization of Polycarbonate Waste by Ethylene Glycol  

Kim, Dongpil (Department of Chemical Engineering, Chungnam National University)
Kim, Bo-kyung (Department of Chemical Engineering, Chungnam National University)
Cho, Youngmin (Department of Chemical Engineering, Chungnam National University)
Han, Myungwan (Department of Chemical Engineering, Chungnam National University)
Kim, Beom-Sik (New Chemical Research Division, Korea Research Institute of Chemical Technology)
Publication Information
Korean Chemical Engineering Research / v.46, no.5, 2008 , pp. 875-879 More about this Journal
Abstract
A method for the depolymerization of polycarbonate waste by glycolysis using ethylene glycol without catalyst was explored in order to get the monomer bisphenol A (BPA). The effect of operation variables such as reaction time, reaction temperature, EG/PC weight ratio and the kinetic of glycolysis were studied. It was found that the polymerization reaction has two different activation energies depending on the reaction temperature. A drop in activation energy with temperature indicates that the reaction mechanism has shifted from one of a succession of elementary steps to another in the series. The maximum yield of BPA of 95.6% was achieved at reaction temperature $220^{\circ}C$ for 85min with EG/PC weight ratio 4.
Keywords
Polycarbonate; Bisphenol A; Depolymerization; Glycolysis;
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