Determining the influence of a filler on the properties of composite materials based on Phenylone C2 for tribojunctions in machines and assemblies

Abstract

The introduction of polymer-composite materials makes it possible not only to solve the problem of increasing durability, reducing the mass and cost of machines, but also, by introducing fillers, to adapt them to the required operating conditions. At the same time, there is a problem regarding the high cost of technologies for obtaining composites, which limits their widespread implementation. That is why the object of this research is the processes of influence of the filler on the characteristics and properties of polymer-composite materials. Complex laboratory studies of physical and mechanical characteristics, tribological and thermophysical properties of the developed polymer-composite materials based on Phenylone C2 were carried out. The dependence of the coefficient of friction and wear of the material based on Phenylone C2, containing thermally expanded graphite, on the pressure and nature of counter-bodies during friction with lubrication and without it was established. It was revealed that the minimum amount of wear of the material, with friction with lubrication, is achieved under the pressure on tribojunction of 5 MPa. It was established that with an increase in the concentration of filler from 5 to 25 wt% the coefficient of thermal conductivity increases by 4–40.8 %, compared with that non-filled with Phenylone C2. It was found that the introduction of thermally expanded graphite into Phenylone C2 in the amount of 5 wt % leads to a decrease in heat capacity by 34 %. The proposed technology of obtaining polymer-composite materials in the electromagnetic field provides sufficient physical and mechanical characteristics, tribological properties and low cost of finished products (parts). The results reported here make it possible to adapt the physical and mechanical characteristics, thermophysical and tribological properties of polymer-composite materials to certain modes of operation of movable junctions

The development of composite reinforced hybrid fiber musa acuminata stem-hibiscus tiliaceust bark with filler liquid rubber as vehicle bumper

“…5. The MASF-HTBF hybrid fiber, which causes an increase in the heat resistance of the specimen, is supported by the results of [15].…”

“…5 it can be seen that there are decomposition symptoms that occur in the sample due to heating in the Thermogravimetric (TGA) test. Decomposition is a chemical reaction process that releases heat and indicates the occurrence of thermal decomposition of the sample organic matter [15]. From the TGA test result curve for decomposition due to thermal degradation of all samples, there are 4 main steps related to degradation due to decomposition reactions in polyester composite specimens reinforcement hybrid fiber MASF-HTBF with filler CTBN).…”