A Kinetic Study on the De-Crosslinking and Decomposition of Silane-Cross-Linked Polyethylene in Supercritical Methanol
| Autor: | Chong Min Koo, Hong-shik Lee, Giyoung Hong, Soon Man Hong, Bum Ki Baek, Youn-Woo Lee |
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| Rok vydání: | 2015 |
| Předmět: |
Cross-linked polyethylene
Chemistry General Chemical Engineering First-order reaction Batch reactor technology industry and agriculture Analytical chemistry macromolecular substances General Chemistry Polyethylene Silane Industrial and Manufacturing Engineering Supercritical fluid chemistry.chemical_compound Reaction rate constant Polymer chemistry Methanol |
| Zdroj: | Industrial & Engineering Chemistry Research. 54:11961-11965 |
| ISSN: | 1520-5045 0888-5885 |
| Popis: | De-crosslinking of silane-cross-linked polyethylene (S-XLPE) in supercritical methanol was investigated. Changes in gel content and molecular weight with reaction temperature and reaction time were analyzed in a batch reactor, and kinetic parameters were calculated from the experimental data. The reaction time for de-crosslinking shortened as the reaction temperature increased and the complete de-crosslinking of S-XLPE was achieved at 320 °C and 20 min. The de-crosslinking rate of S-XLPE fit well with the first order reaction model. In addition, the molecular weight of de-cross-linked polyethylene (DXPE) decreased further as reaction temperature and reaction time increased when the reaction temperature exceeded 360 °C relative to that of the original polyethylene before being cross-linked. The decreasing molecular weight trend also fit well with the first order reaction model. |
| Databáze: | OpenAIRE |
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