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Degradation of High Density Polyethylene, Polypropylene and Their Mixtures in Supercritical Acetone

Title
Degradation of High Density Polyethylene, Polypropylene and Their Mixtures in Supercritical Acetone
Author
배성열
Keywords
Degradation; Supercritical Acetone; High Density Polyethylene; Polypropylene
Issue Date
2001-05
Publisher
The Korean Institute of Chemical Engineers
Citation
Korean Journal of Chemical Engineering, v. 18, no. 3, page. 396-401
Abstract
The degradation of high density polyethylene (HDPE), polypropylene (PP) and their mixtures was carried out in supercritical acetone under the reaction temperature ranging from 450 degreesC to 470 degreesC, pressure ranging from 60 atm to 100 atm and reaction duration time as 60 min. The yields of gas, oil and wax components and the compositions and distributions of liquid-like products were measured by means of gas chromatography and gas chromatography/mass spectrometer. In every run, the reaction was completed in 30 min after reaching the prescribed temperature. The yields of oil and gas degraded from PP were not greatly influenced by the temperature, whereas in HDPE, the yields of oil decreased and that of gas increased, respectively, with rising temperature. The yields of oil from HDPE and PP increased with increasing pressure up to 7 atm and the values under higher pressure remained almost constant, i.e., 88% for HDPE and 96% for PP. Correspondingly, the yields of wax from HDPE and PP decreased with increasing pressure below 75 atm and above the value they remained almost constant, especially zero with PP. Generally, the degradation performance was influenced by the temperature rather than applied pressure. For the degradation of mixtures of HDPE and PP, with increasing PP composition, the yield of oil increased, whereas that of wax decreased, and above 80% of PP composition, it decreased to zero. For example, the yields of oil, wax and gas from a 52 were HDPE similar to 48 wt% PP mixture, amounted to 90 wt%, 1 wt% and 9 wt%, respectively. The yield of wax decreased with increasing PP percentage.
URI
https://link.springer.com/article/10.1007/BF02699185https://repository.hanyang.ac.kr/handle/20.500.11754/158459
ISSN
0256-1115; 1975-7220
DOI
10.1007/BF02699185
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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