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Dielectric properties of a filled epoxy resin: Effect of thermal treatments

  • Polymer Science
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Abstract

Dielectric measurements have been performed at several frequencies on samples of a cycloaliphatic epoxy resin filled with aluminum hydroxide. The samples were thermally treated at three different temperatures for times up to 2,000 hours. At low aging temperatures and times an improvement of the characteristics is observed due perhaps to an assessment of the bulk of the polymer and more precisely to a change in the free volume. At high temperatures and times a thermo-oxidation involving layers deeper and deeper becomes the predominant mechanism responsible of the decrease in the properties with respect to the virgin material.

T g, tanδ and ɛ′ versust a, generalized curves are finally presented useful to predict the behaviour for aging times not easily experienced.

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Author notes

  1. F. P. La Mantia

    Present address: Istituto di Ingegneria Chimica, University of Palermo, Palermo, Italy

Authors and Affiliations

  1. Istituto di Ingegneria Chimica, University of Palermo, Palermo, Italy

    R. Schifani & D. Acierno

  2. Istituto di Elettrotecnica ed Elettronica, University of Palermo, Palermo, Italy

    R. Schifani

Authors
  1. F. P. La Mantia
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  2. R. Schifani
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  3. D. Acierno
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Additional information

Thanks are due to Magrini-Galileo, Italy, for supplying the samples and to C.N.R., Italy, for financial support.

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La Mantia, F.P., Schifani, R. & Acierno, D. Dielectric properties of a filled epoxy resin: Effect of thermal treatments. Colloid & Polymer Sci 260, 297–302 (1982). https://doi.org/10.1007/BF01447967

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  • DOI: https://doi.org/10.1007/BF01447967

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