INFLUENCE OF CARBON REINFORCEMENT ON THE PROPERTIES OF POLYLACTIDE FILAMENT USED IN ENGINEERING PRODUCTS
DOI:
https://doi.org/10.35546/kntu2078-4481.2026.3.2Keywords:
carbon reinforcement, composite materials, additive technologies, mechanical properties, brittle fractureAbstract
This article investigates the effect of a carbon reinforcement on the physical, mechanical, and performance properties of a polylactide filament used to manufacture engineering products via additive manufacturing methods, specifically fused deposition modeling (FDM). The relevance of the study stems from the need to improve the strength, wear resistance, and stability of polymer materials when used under conditions of varying temperatures and loads, as well as the potential for applying 3D-printed products in engineering applications.
This work examines the physicochemical mechanisms of interaction between polylactide and carbon reinforcing fibers, specifically the processes of adhesion, cohesion, and diffusion at the polymer-carbon interface. The role of electron-electron interactions, intermolecular bonds, and the influence of technological factors (temperature, contact time, pressure) on the formation of the composite material’s structure is analyzed. It was established that adhesive strength is determined by both mechanical and physicochemical processes, including microadsorption and the diffusion penetration of carbon particles into the surface layers of the polymer.
The experimental part of the study involved the fabrication of specimens with the addition of approximately 10% carbon filler and their tensile testing in accordance with ASTM D638-14. As a result, it was established that the introduction of carbon reinforcement leads to an increase in the tensile strength and wear resistance of the material; however, it changes the fracture behavior to brittle, which is confirmed by the absence of plastic deformation in the stress-strain diagrams.
The results obtained confirm the potential of using carbon-modified polylactide for the manufacture of functional engineering products with specified mechanical and insulating properties and provide a basis for further research aimed at optimizing the composition and processing parameters of 3D printing.
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