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| Titel: |
Nonisothermal Degradation Kinetics of Ultra-High Molecular Weight Polyethene Composites Filled with Carbon or Aramid Fibers |
| Auteur: |
Koleva, Dimitrina Atanassov, Atanas Nedelchev, Nedelcho |
| Verschenen in: |
International journal of polymeric materials |
| Paginering: | Jaargang 57 (2008) nr. 9 pagina's 841-851 |
| Jaar: |
2008-09 |
| Inhoud: |
The thermal degradation in static air of three types of composite materials based on ultra-high molecular weight polyethene with unmodified and modified carbon fibers or aramid fibers have been investigated under nonisothermal conditions at a heating rate of 10 K min-1. The Coats-Redfern method was used to determine the kinetic parameters. The analysis of the result obtained by the Coats-Redfern method shows that the thermal degradation process of these composites corresponds to a diffusion-controlled reaction (D5 mechanism, three-dimensional diffusion described by Zhuravlev-Lesokhin-Tempelman equation). It was found that the composites with unmodified and modified carbon fibers or aramid fibers possess the highest thermal stability at 3 mass % fiber content. The activation energy, frequency factor and the changes of entropy, enthalpy and Gibbs energy for the active complex of the composites were also measured. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 25 van 45 gevonden artikelen
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