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Model treatments of the heat conductivity of heterogeneous polymers

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Thermal and Electrical Conductivity of Polymer Materials

Part of the book series: Advances in Polymer Science ((POLYMER,volume 119))

Abstract

Basic physical concepts and limitations of current approaches to the theoretical description of the composition dependence of heat conductivity of microheterogeneous polymer materials (MHM) are reviewed. All “pragmatic” approaches (i.e., those assuming the existence of a infinitely thin, “mathematical” interface between the components) fail to account explicitly for salient structural features of MHM such as the onset of an “infinite” cluster of a disperse component at the percolation threshold, and the transition of a portion of a continuous component into a structurally different “boundary interphase” (BI). Among the “physical” approaches, it is apparently the Step-by-Step-Averaging (SSA) model which accounts simultaneously for both cited structural features of MHM. The SSA model was shown to provide a quantitative description of the experimental data available by an appropriate choice of relevant BI parameters (i.e., thickness and “partial” heat conductivity): at the present stage, however, the numerical values of the latter should be considered as fitting variables, rather than true material properties of BI.

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  1. Institute of Macromolecular Chemistry, Academy of Sciences of Ukraine, 253160, Kiev, Ukraine

    V. P. Privalko & V. V. Novikov

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Privalko, V.P., Novikov, V.V. (1995). Model treatments of the heat conductivity of heterogeneous polymers. In: Thermal and Electrical Conductivity of Polymer Materials. Advances in Polymer Science, vol 119. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0021280

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  • DOI: https://doi.org/10.1007/BFb0021280

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