With the rapid development of wireless communication technologies and the miniaturization trend in the electronics industry, the reduction of electromagnetic interference has become an important issue. To solve this problem, a lot of attention has been focused on polymer composites with combined functional fillers. In this paper, we report a method for creating an acrylonitrile butadiene styrene (ABS) plastic composite with a low amount of conductive carbon and magnetic fillers preparation. Also, we investigate the mechanical, thermophysical, and electrodynamic characteristics of the resulting composites. Increasing the combined filler amount in the ABS composite from 1 to 5 wt % leads to a composite conductivity growth of almost 50 times. It is necessary to underline the temperature decrease of 5 wt % mass loss and, accordingly, the composite heat resistance reduction with an increase in the combined filler from 1 to 5 wt %, while the thermal conductivity remains almost constant. It was established that electrodynamic and physical–mechanical characteristics depend on the agglomeration of fillers. This work is expected to reveal the potential of combining commercially available fillers to construct effective materials with good electromagnetic interference (EMI) protection using mass production methods (extrusion and injection molding).

Materials based on a rubber–epoxy matrix filled with coal-tar pitch and petroleum coking additive were investigated. The effect of the fillers on the degradation rate of the cured material and the coke residue yield was studied using data of thermogravimetric and differential thermal analyses and differential scanning calorimetry, It was established that the introduction of coal-tar pitches lowers the thermooxidative stability of the polymer matrix, while the introduction of petroleum coking additive raises it. In tests under isothermal and dynamic conditions, the greatest amount of coke residue is formed after annealing of the composite with petroleum coking additive. Burnout of the coke residue of the given material occurs in the widest temperature range. The influence of the nature of the filler and the test temperature on the mechanical properties of the materials was investigated. It was established that at elevated temperature the best deformation and strength properties are possessed by material with the petroleum coking additive. The prospects of using the obtained materials as heat-shielding coatings were assessed.