Abstract
Thermal conductivity of carbon fibers (CFs), being one of the important properties, is not easily quantified due to practical difficulties in measuring it. We suggest a universal correlation between the thermal conductivity of CFs and their electrical and mechanical properties in order to estimate it without direct measurement. Crystalline structural information did not show a clear correlation with thermal conductivity, especially for commercially available polyacrylonitrile- or isotropic pitch-based CFs that have less than a few nanometers of La and Lc. However, in a correlation between tensile modulus and thermal conductivity, there are three distinct regions and two properties increase with a different inclination in each region. We envisage tensile modulus to be utilized to estimate thermal conductivity without a direct measurement for all kinds of CFs.
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