Abstract
By the extrusion and injection technique, polymer-based composite samples (polypropylene and thermoplastic polyurethane) were obtained with BaTiO3 filler in concentrations between 0 and 35 %. Following the preliminary characterizations performed by coupled thermal analysis techniques, it was found that the composite samples obtained have thermal stability up to a temperature of about 250 oC and can be processed by extrusion at temperatures between 180 and 240oC. Above this temperature, a series of degradation processes take place by successive thermooxidation with the formation of volatile products.The electrical characterization of the composite samples was performed by the dielectric spectroscopy technique, which showed that the A tga dielectric losses increase as the BaTiO3 content of the composite increases. The maximum increase being recorded at 50 Hz (the slope A tga /% BaTiO3 about 0.003 /% BaTiO3). It was also found, that the electrical conductivity (o) of the composite increases with the increase of content in BaTiO3 so that o at 100 kHz for the composite with 35 % BaTiO3 is about 50 times higher than for the reference sample M 0 (without filler).
Highlights
The In the perspective of sustainable development, the rational use of natural resources, respectively, the development of environmentally friendly advanced materials and technologies is a priority issue [1, 2]
By the technique of extrusion and injection, composite samples based on thermoplastic polyurethane and polypropylene with BaTiO3 filler were obtained
From the comparative analysis of the TG, DSC, and DTG diagrams, it is found that up to the temperature of about 280oC the material is stable after which several processes of thermooxidation take place and of decomposition with the formation of volatile products, a process that ends that end at a temperature of about 600oC
Summary
The In the perspective of sustainable development, the rational use of natural resources, respectively, the development of environmentally friendly advanced materials and technologies is a priority issue [1, 2]. In this context, the development of the composite materials with specific characteristics for the most diverse applications is in the continuous attention of the scientific community and industrial developers [3]. The development of 3D printers has opened new research directions in the field of advanced materials, respectively the performed of 3D printable materials In this context, the purpose of the work is the realization and preliminary characterization of composites based on the thermoplastic polymer with filler BaTiO3 for 3D printing applications
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