Reconstruction of a human skeleton using Reverse Engineering and Rapid Prototyping

Grzelka, M.; Budzik, G.; Wieczorowski, Michał; Jakubowicz, Michał; Marciniak-Podsadna, Lidia; Gapiński, Bartosz; Śremski, Krzysztof

doi:10.17814/mechanik.2015.12.562

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“…An important context of research is the possibility of using developed blends in the biomedical industry. The current trend in implantology is the use of reverse engineering methods [25][26][27][28], which is done by designing implants based on the actual shape of the tissue defect. Due to the strength requirements, most bone implants are made using the metal powders techniques [29][30][31], while the FDM printing has a large share in the production of orthoses and stabilizers.…”

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confidence: 99%

Development of Thermal Resistant FDM Printed Blends. The Preparation of GPET/PC Blends and Evaluation of Material Performance

Andrzejewski

Marciniak-Podsadna

2020

Materials

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The paper discusses the preparation of polymer blends based on the polyethylene terephthalate copolymer/polycarbonate (GPET/PC). Materials have been prepared in order to assess their applicability in the fused deposition modeling (FDM) 3D printing process. The tested key feature was the thermomechanical resistance, measured by head deflection temperature (HDT) and Vicat softening temperature (VST), the mechanical tests and dynamic mechanical thermal analysis (DMTA) were also performed. A clear relationship between the increasing content of PC in the blend properties was observed. DMTA analysis revealed significant changes in the glass transition temperature, which indicates the miscibility of this type of polymer system. The mechanical tests indicate a clear trend of stiffness and strength improvement along with the increasing share of PC phase in the structure. The increase in impact strength is also clear, however, compared to the results for a pure PC, the results obtained for GPET/PC blends are significantly lower. As part of the research, reference samples based on polyethylene terephthalate homopolymer (PET) and composite samples with addition of 10% talc were also prepared. The structure analysis for PET/PC(50/50) samples did not show miscibility. However, due to the formation of the PET crystalline phase, the thermomechanical resistance of these materials was visibly higher. Scanning electron microscopy (SEM) analysis confirmed a high degree of compatibility of the GPET/PC blend structure as indicated by the lack of visible signs of phase separation. This phenomenon is not observed for PET/PC blends, which confirms the different thermomechanical interactions of both tested polymer systems.

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