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Morphology and Conductivity of Polymer Blends Filled with Carbon Black

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Abstract

It has been shown that the electrical conductivity of polymer blends filled with carbon black (CB) can be much higher than that of each constituent for the same level of loading. It is very difficult to understand this phenomenon due to the complexity of the three phases system. In particular it has been argued that the results could not be explained if the morphology of the blend was independent of the amount of CB. Indeed, an image analysis of the TEM and SEM micrographs of polymer blends filled with Ketjenblack (KB), reveals that the size distribution of the polystyrene component of the blend changes with the concentration of KB. One observes that an increase of 5% in KB results in a reduction of the average size of the PS component by 50% Since the KB dispersion seems to be linked to the dispersion of the polystyrene component our findings could explain why the dispersion is improved in the blend and gives rise to a lower percolation threshold.

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Authors and Affiliations

  1. Department of Chemistry, Université Libre de Bruxelles, Campus Plaine, B-1050

    G. Geuskens & E. De Kezel

  2. Physique des Matériaux, Université de Liège, B-4000, Belgium

    S. Blacher, Génie Chimique & F. Brouers

Authors
  1. G. Geuskens
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  2. E. De Kezel
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  3. S. Blacher
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  4. Génie Chimique
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  5. F. Brouers
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Geuskens, G., De Kezel, E., Blacher, S. et al. Morphology and Conductivity of Polymer Blends Filled with Carbon Black. MRS Online Proceedings Library 214, 95–100 (1990). https://doi.org/10.1557/PROC-214-95

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  • DOI: https://doi.org/10.1557/PROC-214-95

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