OBRABOTKAMETALLOV MATERIAL SCIENCE Vol. 27 No. 1 2025 elements, such as gold (Au), were observed, which were applied onto the surface to improve image contrast. The elemental distribution confirms that the presence of PEEK does not significantly affect the base composition, but introduces functional groups associated with the chemical structure of PEEK. Fluctuations in oxygen levels in different locations may be related to the presence of these functional groups, which are important for PEEK properties, including its thermal stability and resistance to harsh environments. The data from scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) collectively show that the addition of 10 wt. % PEEK to the base material has a significant impact on the microstructure, especially compared to lower PEEK concentrations. SEM images show a uniform distribution of PEEK particles, which, in turn, leads to an increase in mechanical properties such as stiffness and tensile strength. This improvement in mechanical properties can be explained by the reinforcing action of the particles within the polymer matrix. The inherent amorphous structure of the material, which is maintained even at the higher PEEK concentration, is advantageous for maintaining its flexibility and impact toughness. EDS analysis confirms these findings, demonstrating that the composition of the material mainly corresponds to the composition of PEEK, with carbon and oxygen being the main components. The inclusion of PEEK particles does not lead to significant phase separation, thereby maintaining a homogeneous structure in the composite. Discussion: The incorporation of PEEK into the Acrylate polymer matrix at concentrations of 5 wt. % or 10 wt. % enhances the mechanical properties of the material by reinforcing the structure, while the material maintains flexibility and surface smoothness. These composites possess a balanced combination of strength, durability, and adaptability, making them optimal candidates for applications where these characteristics are essential. The choice between 5 wt. % and 10 wt. % PEEK content will depend on the specific mechanical property requirements of the material based on the intended application, where higher PEEK concentrations will provide increased stiffness and strength. Wear testing results The results of pin-on-disc wear tests conducted on samples of base Acrylate, a 5 wt. % PEEK in Acrylate composite, and a 10 wt. % PEEK in Acrylate composite clearly demonstrate the impact of PEEK reinforcement on the wear resistance and frictional properties of Acrylate. Table 5 presents the experimental observations obtained during the pin-on-disc wear tests. A systematic analysis of friction coefficients, wear rates, and SEM images of the worn surfaces clearly shows the benefits of PEEK reinforcement for improving the tribological properties in applications where the material is subjected to loads. The wear test results demonstrate a pronounced relationship between the degree of reinforcement, wear resistance, and frictional characteristics for the base Acrylate, a 5 wt. % PEEK in Acrylate composite, and a 10 wt. % PEEK in Acrylate composite. The base Acrylate exhibited a friction coefficient of 0.45 and the highest wear rate, measured at 1.2×10−6 mm3/N⋅m. SEM analysis of the base Acrylate surface revealed visible wear tracks and significant material removal, indicating its limited wear resistance, which is expected for an unreinforced polymer. The friction coefficient for the 5 wt. % PEEK inAcrylate composite decreased to 0.40, and the wear rate decreased to 0.9×10−6 mm3/ N⋅m. SEM images of the 5 wt. % PEEK composite surface showed improved uniformity and moderate wear tracks, indicating that the introduction of 5 wt. % reinforcing particles enhances the material’s structural integrity and, consequently, its wear resistance. Ta b l e 4 Composition of 10 % wt. PEEK in Acrylate composites material Element Weight (%) Atomic (%) C 70.19 75.82 O 29.81 24.18 Totals 100.00 –
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