Ito, Edson NoriyukiLima, Luís Eduardo da Silva2024-03-202024-03-202024-03-08LIMA, Luís Eduardo da Silva. Produção e análise de filamentos não convencionais de PP, PA6 e PMMA para impressão 3D. 2024. 40f. Trabalho de Conclusão de Curso (Graduação em Engenharia de Materiais) - Departamento de Engenharia de Materiais, Universidade Federal do Rio Grande do Norte, Natal, 2024.https://repositorio.ufrn.br/handle/123456789/579043D printing through Fused Deposition Modeling (FDM) is widely used across various sectors of society, yet few thermoplastic filaments dominate the market. With increasing demands for alternatives to conventional filaments, this work aims to produce and evaluate polypropylene (PP), polyamide 6 (PA6), and poly(methyl methacrylate) (PMMA) filaments to achieve a wider range of costs, properties, and applications. The melt flow index measurements of the materials were verified using a Ceast Melt Flow plastometer to assess the rheology of each material and the ideal temperature ranges for subsequent processing. The materials were plasticized in a single-screw extruder for filament production and exhibited good flow during extrusion, allowing for diameter control of the filaments at 1.75 mm. Subsequently, V-type test specimens of PP, PA6, and PMMA were produced according to ASTM D638 standard using 3D printing, varying the layer deposition configuration. The variation occurred in the deposition angle: 0° (oriented layers) and 45° (alternating layers). Additionally, type I test specimens were fabricated via injection molding, which were laser-cut into V-type test specimen shapes for characterization under the same conditions and comparison between molding techniques. The samples were characterized through uniaxial tensile testing and scanning electron microscopy (SEM). Samples printed in semicrystalline polymer showed a greater tendency to warping due to their contraction characteristics upon cooling; however, processing parameters were adjusted. Adjustments in processing configuration, such as temperature changes, air entry into the interior of the 3D printer, and adhesion of the molten polymer to the print bed, enabled obtaining good quality in the produced test specimens. The printed test specimens exhibited mechanical property results close to those produced by injection molding, indicating that FDM 3D printing can be used to produce parts with good mechanical properties.Attribution-NonCommercial-NoDerivs 3.0 Brazilhttp://creativecommons.org/licenses/by-nc-nd/3.0/br/impressão 3dfilamentosPPPMMAPA6bachelorThesis