The examination of mechanical and tribological properties of carbon fiber, PTFE and wax filled Pa6 polymer composites materials

In this study PA6 polymer composites were proruced by adding at the ratio of %10, %20 ve %30 carbon fiber. PA6+20 KE polymer composites were produced by adding 5% and 10% polytetrafluoroethylene (PTFE) and wax 2% and 4% wax) solid lubricants. KE, PTFE and wax-added PA6 polymer composite granules were produced in double-screw extruders. Subsequently, tensile, impact and wear samples were produced by injection molding using a mold designed in accordance with standards. In order to determine mechanical properties, density and Shore D hardness tests were applied to PA6 and PA6 composite specimens for tensile test, impact test and bending tests, to determine physical properties. HDT, vicat, differential scanning calorimetry (DSC) and scanning electron microscopy (SEM) were used for TGA microstructural characterization to determine the thermal properties of PA6 composites. The abrasion and friction tests were carried out in a pin-disc device under dry conditions. Experiments were performed with shear rates of 10N, 20N, 30N, 40N load and 0,4 m/s – 0,8m s – 1,2m/s, constant 2000 meter shear distance. As a result of experimental studies, friction coefficient and wear rate increased due to increased load and shear rate. PTFE and wax added to 20% carbon fiber reinforced PA6 polymer significantly reduce the friction coefficient and wear rate of the samples. The lowest coefficient of friction and wear rate were obtained at 4% wax added PA6. The tensile strength, modulus of elasticity, flexural strength and isod impact strength of the carbon fiber added to the PA6 polymer and the amount of carbon fiber increased, while the elongation at break decreased. At the same time, the amount of carbon fiber added to the PA6 polymer also increased HDT and Vicat values.