THERMOPHYSICAL CHARACTERISTICS OF POLYMERIC COMPOSITE MATERIALS WITH CARBON COMPONENTS FOR ELECTRICAL DEVICES

The relevance of the work is caused by the need to further improve the properties of composite materials - their manufacturability, re-source and energy efficiency. The scope of such materials is expanding, covering, among other things, the exploration and production of oil and gas resources, due to the possibility of regulating their properties over a wide range. Resistive and insulating products made of pol-ymer materials with carbon components are characterized by low weight and cost, as welas the availability of raw materials and industrial manufacturing technology. The variety of processes in filed polymers used in resistive structures at elevated temperatures requires the study of their thermophysical characteristics, which determine the processes of heat transfer in the material. Heat release and heat transfer in them are realized at different levels: electricaly conductive mesh immersed in a polymer matrix. This makes it relevant to study therm o -physical characteristics, which are formed due to a wide range of parameters. Purpose: to study the thermophysical characteristics of rubbers filed with carbon black to increase the efficiency of their use in products and structures; to reveal the effect of carbon components on the thermophysical and structural characteristics of polymer composite materials. Methods: instrumental measurements of thermophysical characteristics of materials, X-ray diffraction, statistical and correlation analyses. Results. It was experimentaly confirmed that thermophysical characteristics (heat capacity, thermal conductivity, thermal diffusivity) de-pend on the type of binder base. Their relationship with the physical properties of the binder base and composite material is analyzed. The dependence of thermophysical characteristics on the degree of crystalinity of the binder component in the composite material was estab-lished - with an increase in the content of the crystaline phase in the polymer, the heat capacity, thermal conductivity and thermal diffusivi-ty increase. Recommendations are formulated for the selection of a binder material for polymer composite materials with carbon compo-nents, depending on the nature of the thermal regime of the structure, for example, when operating in non-stationary thermal regimes.