Thermo-rheological effects on successful 3D printing of biodegradable polyesters

Candal, Marı́a; Calafel, Itxaso; Aranburu, Nora; Fernández, María Tomé; Gerrica-Echevarria, Gonzalo; Santamaría, Antxón; Müller, Alejandro J.

doi:10.1016/j.addma.2020.101408

Cited by 14 publications

(19 citation statements)

References 46 publications

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“…Pneumatic grips were used to hold the specimens during testing. The resulting tear force versus displacement curves for TPU and TPU/CNT are similar to those typically generated by low-extensible thin films and sheets (29). The average of the load over a 25.4 mm interval was used to calculate the tearing force.…”

Section: Welding Strengthmentioning

confidence: 72%

Study of the interlayer adhesion and warping during material extrusion-based additive manufacturing of a carbon nanotube/biobased thermoplastic polyurethane nanocomposite

Candal

Calafel

Fernández

et al. 2021

Polymer

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A thermoplastic bio-polyurethane from renewable sources (TPU) and the nanocomposite developed by mixing it with carbon nanotubes (CNT) are investigated as potentially adequate for Material Extrusion-based Additive Manufacturing (EAM). Thermal and rheological features are studied from the perspective of their liaisons with printing adequacy and conditions. As predicted by rheology, both samples show good performance in filament elaboration and flow in the nozzle. Warpage is observed for TPU, but not for the nanocomposite, which is due to the effect of CNT nanoparticles on polymer chains dynamics.At the studied printing velocities, interlayer adhesion strength is independent of printing velocity implying that there is no significant chain orientation which can induce changes in the TPU entanglements. The nanocomposite shows a lower welding strength, notwithstanding both have the same chain entanglements density. This is explained by considering that the higher viscosity of TPU/CNT, as compared to TPU, reduces the melt diffusion coefficient.

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Section: Welding Strengthmentioning

confidence: 72%

Study of the interlayer adhesion and warping during material extrusion-based additive manufacturing of a carbon nanotube/biobased thermoplastic polyurethane nanocomposite

Candal

Calafel

Fernández

et al. 2021

Polymer

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“…Excellent filaments are obtained for both polymers, which is compatible with the rheological results. [31] The effect of the number of layers on thermal, molecular weight properties, and mechanical and the relationship among them are investigated. [32] The PLA, impact PLA Grey, and HD PLA Green are used [33] to examine tensile properties.…”

Section: Biodegradability Of Polymersmentioning

confidence: 99%

Biodegradable Filament for 3D Printing Process: A Review

Manoj¹,

Panda²

2022

Eng. Sci.

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Three-dimensional (3D) printing is a transformative fabrication process that allows 3D objects to be formed by the layer deposition of the materials. At present, a fused deposition modeling 3D printer uses non-biodegradable materials to fabricate the filament for 3D printing. The innovative manufacturing strategies and possibilities accelerated the use of different kinds of biological materials in 3D printing or additive manufacturing. A lot of research has been taken place on the development of biofilaments to replace the modern/classic plastic filament to mitigate the issue of sustainability. Moreover, the use of biofilament will reduce the cost of the filament which limits the use of petroleum-based filament. This paper analyses the development of various 3D printing biofilaments and their fabrication process reported in the different literature.

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“…Nowadays, the rapid development of thermoplastic biopolymers has its reflection in the research on the rheology of additive manufacturing at the UPV/EHU. Candal et al [ 49 ] have investigated biodegradable poly(butylene succinate) (PBS) and poly(butylene succinate- ran -adipate) (PBSA) copolymers, observing that the viscosity results determine the good flow in the printer nozzle. Moreover, the relation between the values of the entanglements density, obtained by small amplitude oscillatory shear (SAOS) measurements, and the welding energy of the printed layers was demonstrated.…”

Section: Thermoplastic Polymersmentioning

confidence: 99%

Rheology of Polymer Processing in Spain (1995–2020)

et al. 2021

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The contribution of Spanish scientists to the rheology involved in polymer processing during the last 25 years is investigated. It is shown that the performed research covers, at different levels, all industrial polymeric materials: thermoplastics, thermosets, adhesives, biopolymers, composites and nanocomposites, and polymer modified bitumen. Therefore, the rheological behaviour of these materials in processing methods such as extrusion, injection moulding, additive manufacturing, and others is discussed, based on the literature results. A detailed view of the most outstanding achievements, based on the rheological criteria of the authors, is offered.

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Thermo-rheological effects on successful 3D printing of biodegradable polyesters

Cited by 14 publications

References 46 publications

Study of the interlayer adhesion and warping during material extrusion-based additive manufacturing of a carbon nanotube/biobased thermoplastic polyurethane nanocomposite

Study of the interlayer adhesion and warping during material extrusion-based additive manufacturing of a carbon nanotube/biobased thermoplastic polyurethane nanocomposite

Biodegradable Filament for 3D Printing Process: A Review

Rheology of Polymer Processing in Spain (1995–2020)

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