Abstract:

Polymer materials are widely used in various fields of the world economy and their properties are developing rapidly. The emergence of new technologies such as additive manufacturing (AM) has created needs such as higher performance and functionality for polymer materials and composites. Polymer powder materials are one of the most used consumables in EI technologies and are mainly used in selective laser sintering (SLS) technology. SLS is a powder bed fusion process that produces 3D solid components by selectively sintering successive layers of powder raw materials according to a 3D (3D) computer aided design model. In this study, Polyamide 12 (PA12) pellets were pulverized by fiber melting method and optimized for use in desktop SLS systems. In the study, PA12 was turned into fiber yarns of different diameters in the melt spinning device. The fiber yarns obtained were cut and subjected to thermal treatment with Polyethylene Oxide (PEO) in a heated balloon mixer and powders close to spherical form were obtained. These powders, which have undergone drying and sieving processes, were printed on an SLS (Selective laser sintering) 3D printer with open parameter. Differential scanning calorimetry (DSC), scanning electron microscopy (SEM) and sieve analysis were performed on powder samples. For printing samples; tensile, hardness, impact, density, melt flow index (EAI), vicat softening temperature tests were performed and SEM analysis was used for microstructural examination of the samples. The results of the tests of the samples were examined and the properties of commercial and produced PA12 were compared.

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