bachelorThesis
Análise de blenda à base de amido termoplástico/PELMD visando aplicação na manufatura aditiva
Fecha
2017-11-16Registro en:
ANDREATTA, Juliana Massae; NUERNBERG, Kaique Acácio. Análise de blenda à base de amido termoplástico/PELMD visando aplicação na manufatura aditiva. 2017. 65 f. Trabalho de Conclusão de Curso (Graduação em Engenharia Mecânica) - Universidade Tecnológica Federal do Paraná, Curitiba, 2017.
Autor
Andreatta, Juliana Massae
Nuernberg, Kaique Acácio
Resumen
Additive manufacturing has been gaining space in the industrial market. Techniques as the Fused Deposition Modelling (FDM) transform simple monofilaments in objects with complex geometry. At the same time, due to ecological demands and the limitation of the petrochemical resources, the need to expand studies around less environmental aggressive polymers arises. Starch-based polymers are considerate to be a promising alternative for the replacement of the conventional materials. The main objective of the present work is the development and analysis of a material whose main raw material is starch and linear medium density polyethylene, so that it was possible to verify its use in the additive manufacturing industry, causing minimal interference in the final quality of the manufactured product. As the first step, it was verified the effect of the citric acid (AC) and the polyethylene glycol (PEG) on the thermoplastic starch (TPS) obtained by reactive extrusion using the constant mass ratio of 70% starch and 30% glycerol. The purpose was to verify the improvement in the compatibility of the TPS with PE. First, the materials were mixed in a mechanical mixer until a homogeneous compound was obtained. The samples had PEG an AC in the following proportions: 0:0% (AM01), 3:0% (AM02), 1,5:1,5% (AM03), 3:3% (AM04) e 0:3% (AM05). The second step, polyethylene was added to the modified TPS in the ratio of 50:50%. Optical reflection microscopy was performed in the samples with and without polyethylene, and the samples without PEG were more homogeneous. It was evident in the Shore A hardness tests that the sample without any additives and the sample with 3% of citric acid had similar hardness to the polyethylene sample (75.2, 66.2 e 75.1, respectively). From the tensile test performed, it was observed that no sample showed a significant improvement in the tensile strength between their different compositions. The TPS was successfully obtained, however, the fragility limits you use in the FDM process. The /LMDPE blend was obtained, but your mechanical properties were not satisfactory when compared with materials that are already used in the manufacturing industry (ABS, PLA and PETG).