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Degradation of Polystyrene in Supercritical n-Hexane

Title
Degradation of Polystyrene in Supercritical n-Hexane
Author
배성열
Keywords
Degradation; Polystyrene; Supercritical n-Hexane; Pyrolysis
Issue Date
2001-11
Publisher
The Korean Institute of Chemical Engineers
Citation
KOREAN JOURNAL OF CHEMICAL ENGINEERING, v. 18, no. 6, page. 854-861
Abstract
Degradation of polystyrene was carried out in supercritical n-hexane under reaction temperature ranging from 330 degreesC to 390 degreesC, pressure ranging from 30 bar to 70 bar and reaction duration of 90 min. The conversion of polystyrene increased with rising temperature and pressure. The degradation performance was influenced by the temperature rather than applied pressure. Polystyrene rapidly degraded in 30 min after reaching a prescribed temperature ranging from 350 degreesC to 390 degreesC. At a prescribed temperature of 390 degreesC, the degree of degradation was higher than 90%. The degradation reaction was examined experimentally at a relatively low temperature of 330 degreesC. The degradation of polystyrene by using supercritical n-hexane has been found to be more effective compared to general pyrolysis (thermal degradation). Among the selectivity of liquid products, that of a single aromatic ring group like styrene at 390 degreesC increased up to 65% in 90 min. It was found from the analysis by a gel permeation chromatograph (GPC), that high molecular-weight compounds decreased but oligomers increased with rising temperature.
URI
https://link.springer.com/article/10.1007/BF02705608https://repository.hanyang.ac.kr/handle/20.500.11754/161524
ISSN
0256-1115
DOI
10.1007/BF02705608
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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