APPLICATION OF A NEW THEORETICAL EQUATION DESCRIBING THERMAL CONDUCTIVITY OF COMPOSITES, POLYMER BLENDS, AND FILLED POLYMERS

摘要

A new theoretical equation that describes the thermal conductivity of two-phase materials has been proposed. This new equation has been applied to carbon short fiber (CSF) filled polyethylene (PE). Although the other equations failed to describe the thermal conductivity of this composite system, the new equation has described it successfully. The dispersion state of the CSF is represented by P_(d max), which is a new parameter introduced into the new equation. All experimental data of the thermal conductivity of the CSF filled PE were scattered in the region from P_(d max)=0.17 to P_(d max)=0.52. This result suggests that the closest packing state of the CSF in this system is random packing.