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Depolymerization of Polyethyleneterephthalate in supercritical methanol

Title
Depolymerization of Polyethyleneterephthalate in supercritical methanol
Author
배성열
Keywords
depolymerization; polyethyleneterephthalate; supercritical methanol; methanolysis
Issue Date
2001-06
Publisher
John Wiley & Sons, Inc.
Citation
Journal of Applied Polymer Science, v. 81, issue. 9, page. 2102-2108
Abstract
The depolymerization of polyethyleneterephthalate (PET) in supercritical methanol was carried out using a batch-type autoclave reactor. The total conversion and the yield of dimethylterephthalate (DMT) increased with rising temperature. The final yield of DMT at 300 degreesC and 310 degreesC reached 97.0% and 97.7%, respectively. The yield of DMT was markedly increased when the methanol density was 0.08 g/cm(3), and leveled off at higher densities. A kinetic model to describe the depolymerization of PET in supercritical methanol was proposed, where the scission of one ester linkage in PET by a methanol molecule produces one carboxymethyl group and one hydroxyl group. The values of the forward reaction rate constant at different temperatures were determined by comparing the observed time dependence of carboxymethyl group concentration with that calculated by the proposed model. The activation energy was evaluated to be 49.9 kJ/mol, a value close to a Literature value (55.7 kJ/mol). (C) 2001 John Wiley & Sons, Inc.
URI
https://onlinelibrary.wiley.com/doi/full/10.1002/app.1645https://repository.hanyang.ac.kr/handle/20.500.11754/158338
ISSN
0021-8995; 1097-4628
DOI
10.1002/app.1645
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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