Structure, composition, and preparation of thermal conductive composite materials based on polyurethane and modified silicon carbide particles

Abstract

This paper presents the first data on the dependence of thermal conductivity of DFPCM on generalized parameters and type of structure, according to the classification (dilute – low filled – medium filled – high filled systems), using the system of polyurethane + modified silicon carbide particles as an example. New plasma-modified silicon carbide particles with a unique structure and high specific surface area have been obtained, and their main characteristics necessary for calculating the compositions, generalized parameters, and determining the type of disperse structure of DFPCM have been determined. The main regularities are established that describe the relationship between the thermal conductivity coefficient (λ pcm) and the generalized parameter Θ, the type of structure of the DFPCM, and the surface morphology of SiC particles. For the first time, the contribution of the specific surface area of dispersed SiC particles (S BET − from 3 to 45 m2/g) to the thermal conductivity of disperse systems is shown.