Parametrização reológica do comportamento de blendas autorreparáveis durante o processo de impressão 3D

• Ano de defesa: 2020
• Autor(a) principal: Philipe Augusto Pocidonio SIlva
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Minas Gerais; Brasil; ENG - DEPARTAMENTO DE ENGENHARIA METALÚRGICA; Programa de Pós-Graduação em Engenharia Metalúrgica, Materiais e de Minas; UFMG
• Palavras-chave em Português: Impressão 3D; PE-co-AMA; Modelagem por deposição de fundido; PETG; Blendas poliméricas; Autorreparo; Materiais; Ciência dos materiais
• Link de acesso: http://hdl.handle.net/1843/35916; https://orcid.org/0000-0003-0235-9319

In this work, the main rheological variables that influence the 3D printing process, Fused Deposition Modeling (FDM), were be parameterized. For this, polymeric blends with two polymers with distinct rheological properties were prepared, one of them being widely used in FDM printing processing, poly(ethylene glycol-co-cyclohexane-1,4-dimethanol terephthalate) (PETG) and the other Surlyn 8940® a poly(sodium ion stabilized methacrylic acid co-acid) (PE-co-AMA), which has self-healing properties. New polymeric blends PETG / PE-co-AMA containing 30%, 50% and 70% by weight of PE-co-AMA were prepared. Filaments were prepared in a large scale with the blends and enabled a successful printing of high quality parts with high mechanical properties. The prepared blends were characterized by thermal, mechanical, morphological, rheological and self-healing tests. Damages created in the blends by an indentation derived from a microhardness test were partially or totally repaired. The obtained novel blends were identified as immiscible and compatible, and can be considered an innovative product that can, in addition to FDM 3D printing, be used in many applications.