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Open AccessArticle

Printability and Tensile Performance of 3D Printed Polyethylene Terephthalate Glycol Using Fused Deposition Modelling

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INRA, UR1268 Biopolymères Interactions Assemblages, F-44300 Nantes, France
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Laboratoire GEPEA, UMR CNRS 6144, Université - IUT de Nantes, avenue du Professeur Jean Rouxel, 44475 Carquefou Cédex, France
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IMT Lille-Douai, 941 rue Charles Bourseul, CS 10838, 59508 Douai, France
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Laboratoires des Systèmes Electromécaniques (LASEM-ENIS), Université de Sfax, Route Soukra Km3, BPW3038, Sfax, Tunisia
*
Author to whom correspondence should be addressed.
Polymers 2019, 11(7), 1220; https://doi.org/10.3390/polym11071220
Received: 22 June 2019 / Revised: 16 July 2019 / Accepted: 17 July 2019 / Published: 22 July 2019
Polyethylene terephthalate glycol (PETG) is a thermoplastic formed by polyethylene terephthalate (PET) and ethylene glycol and known for his high impact resistance and ductility. The printability of PETG for fused deposition modelling (FDM) is studied by monitoring the filament temperature using an infra-red camera. The microstructural arrangement of 3D printed PETG is analysed by means of X-ray micro-tomography and tensile performance is investigated in a wide range of printing temperatures from 210 °C to 255 °C. A finite element model is implemented based on 3D microstructure of the printed material to reveal the deformation mechanisms and the role of the microstructural defects on the mechanical performance. The results show that PETG can be printed within a limited range of printing temperatures. The results suggest a significant loss of the mechanical performance due to the FDM processing and particularly a substantial reduction of the elongation at break is observed. The loss of this property is explained by the inhomogeneous deformation of the PETG filament. X-ray micro-tomography results reveal a limited amount of process-induced porosity, which only extends through the sample thickness. The FE predictions point out the combination of local shearing and inhomogeneous stretching that are correlated to the filament arrangement within the plane of construction. View Full-Text
Keywords: fused deposition modelling; polyethylene terephthalate glycol; tensile properties; X-ray micro-tomography; finite element computation fused deposition modelling; polyethylene terephthalate glycol; tensile properties; X-ray micro-tomography; finite element computation
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MDPI and ACS Style

Guessasma, S.; Belhabib, S.; Nouri, H. Printability and Tensile Performance of 3D Printed Polyethylene Terephthalate Glycol Using Fused Deposition Modelling. Polymers 2019, 11, 1220.

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