Effect of mineral fillers on heat resistance of polymer composite materials

The thermophysical properties of composite materials based on thermoplastic elastomers have been studied. The regularities of changes in the heat resistance of composites depending on the content of introduced mineral fillers (basalt, wollastonite) have been studied. When choosing fillers, special attention was paid to obtaining composites with improved thermophysical properties. From the variety of existing minerals in Kyrgyzstan, based on their properties (in particular, stability at high temperatures) and the availability of raw materials, basalt and wollastonite were chosen for further research. The obtained experimental results showed that an increase in the heat resistance index is observed in all TPE compositions filled with basalt and wollastonite chips, short basalt fibers along a quadratic parabola, which is primarily due to the high melting point of the mineral fillers used, as well as the content of silicon dioxide in their composition. providing low moisture content. Moreover, in compositions with wollastonite chips faster than in others. Density is an important indicator that affects strength, extensibility, hardness and a number of other properties. Density determination was carried out in accordance with state standards describing the features of hydrostatic weighing. It has also been experimentally established that an increase in the volume fraction of the dispersed phase leads to an increase in the density of the composite. The introduction of up to 14 volume percent of fillers into the composition leads to an increase in density by 10 and 15% for basalt filler, and by 17% for wollastonite filler. A further increase in the amount of filler in the composition (above 14% by volume) leads to an increase in viscosity. This makes it difficult to process the composite material. The experimental data obtained make it possible to choose the optimal content of mineral fillers in the composition of the polymer composite material, which provides the required performance properties of the shoe bottom materials