Polycarbonate–Tungsten Polymer Composite in Three-Dimensional Printing

Material-extrusion three-dimensional (3D) printing has recently attracted much interest because of its process flexibility, rapid response to design alterations, and ability to create structures “on-the-go”. For this reason, 3D printing has possible applications in rapid creation of space-based devices, for example cube satellites (CubeSat). The polycarbonate–tungsten polymer composite, which is designed for x-ray radiation-shielding applications, had intentionally utilizes low loading levels to provide x-ray shielding while limiting effects on other properties of the material, for example weight, electromagnetic functionality and mechanical strength.

The fabrication process, from tungsten functionalism to filament extrusion and material characterization, is described, including printability, determination of x-ray attenuation, tensile strength, impact resistance, and gigahertz permittivity, and failure analysis. The proposed materials are uniquely advantageous when implemented in 3D printed structures, because even a small volume fraction of tungsten has been shown to substantially alter the properties of the resulting composite.

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