Evaluation of Printing Parameters on Porosity and Mechanical Properties of 3D Printed PLA/PBAT Blend Parts

Fused deposition modeling (FDM) is a rapidly growing additive manufacturing technology due to its ability to manufacture complex‐shaped parts in a simple process. FDM parts present inherent porosity due to the fabrication process. The mechanical performance of the built part depends on controlling s...

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Bibliographic Details
Published in:Macromolecular symposia. 2020-12, Vol.394 (1), p.n/a
Main Authors: Cardoso, Paulo Henrique Machado, Coutinho, Rafaella Rabello Teixeira Perdone, Drummond, Flávia Rocha, da Conceição, Marceli do Nascimento, Thiré, Rossana Mara da Silva Moreira
Format: Article
Language:English
Subjects:
additive manufacturing
Biodegradability
biodegradable
Deposition
Design of experiments
Fused deposition modeling
Mechanical properties
Parameter identification
Polylactic acid
Porosity
Printing
Rapid prototyping
Stiffness
Tear strength
Terephthalate
Thickness
Three dimensional printing
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Summary:Fused deposition modeling (FDM) is a rapidly growing additive manufacturing technology due to its ability to manufacture complex‐shaped parts in a simple process. FDM parts present inherent porosity due to the fabrication process. The mechanical performance of the built part depends on controlling several printing parameters of the specimen and the quantity of voids. PLA/PBAT [polylactic acid/poly(butylene adipate‐co‐terephthalate)] blend is a biodegradable polyester with bio‐based content that is used as a potential replacement for conventional petroleum‐based polymers. PBAT reduces the stiffness and improves the tear strength of PLA. There is a lack of research on PLA/PBAT 3D printed parts, especially the relationship between flexural mechanical properties and porosity of PLA/PBAT parts. The aim of this work is to investigate the effect of layer thickness (LT), deposition speed (DS), and printing direction (PD) on porosity and flexural properties of PLA/PBAT blend parts. Experimental design method is used to identify the set of parameters, which gives optimized results. Specimens fabricated with lower printing parameter values allowed obtaining parts with less porosity and consequently improved bending properties.
ISSN:1022-1360
1521-3900
DOI:10.1002/masy.202000157