Estudio del comportamiento mecánico en probetas de material termoplástico obtenidas por impresión aditiva 3D MDF y tratadas térmicamente.

Abstract

Abstract (at least 250 words):Heat treatments, commonly associated with metals, can also be applied to polymers. In this extensive group of materials, the category of thermoplastics, whose structures are composed of amorphous or semi-crystalline regions made up of polymeric chains, stands out. The versatility in the conformational forms is one of the distinctive advantages of polymers. In the present study, the use of MDF 3D printing technology using ABS filament is explored. Although this process allows the creation of complex and detailed geometries, it faces limitations in the mechanical properties of the resulting parts. Therefore, the implementation of a post-processing heat treatment at glass transition temperature (Tg) of ABS is proposed to modify its structure and consequently alter the mechanical properties of the parts. The heat treatment causes a reorganization of the polymeric chains towards one with higher order, which has an impact on the mechanical properties. By means of hardness, tensile, flexural and macrographic tests, the changes caused by heat treatment exposure are determined. It is determined that the group subjected to heat treatment maintains its physical appearance. In addition, an increase in the deformation at failure, hardness and a decrease in the elastic modulus was obtained with respect to the group of specimens that were not treated.