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Journal of Materials Science

, Volume 45, Issue 21, pp 5851–5859 | Cite as

Effect of filler dispersion degree on the Joule heating stimulated recovery behaviour of nanocomposites

  • H. H. Le
  • I. Kolesov
  • Z. Ali
  • M. Uthardt
  • O. Osazuwa
  • S. Ilisch
  • H.-J. Radusch
Article

Abstract

Composites based on highly branched ethylene-1-octene copolymer (EOC) and carbon black (CB) with different dispersion degree of CB were prepared. The method of the online measured electrical conductance/resistance was used to monitor the change of the electrical conductance/resistance of the composites during the preparation processes, i.e. mixing and cross-linking. It was found that the kinetics of thermally stimulated shape-memory recovery of CB filled EOC is strongly influenced by the filler dispersion degree, which actually affects the heat transfer in the composites. Using a special arrangement of experiments the Joule heating stimulated shape-memory behaviour was quantified. CB dispersion degree and related electrical resistivity determine the extent of the Joule heating stimulated shape-memory behaviour. Composite collected at the maximum in the online measured conductance–time characteristics showed the best shape-memory effect owing to the highest electrical conductivity in the solid state. The CB filled EOC showed a negative thermal coefficient of resistivity (NTC) effect, which accelerates the temperature increase and shape-memory recovery of the composites when applying a voltage.

Keywords

Carbon Black Joule Heating EPDM Dispersion Degree Carbon Black Surface 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  • H. H. Le
    • 1
  • I. Kolesov
    • 1
  • Z. Ali
    • 1
  • M. Uthardt
    • 1
  • O. Osazuwa
    • 1
  • S. Ilisch
    • 1
  • H.-J. Radusch
    • 1
  1. 1.Center of Engineering Sciences, Polymer TechnologyMartin Luther University Halle-WittenbergHalleGermany

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