Dechet M, Gomez Bonilla JS, Grünewald M, Popp K, Rudloff J, Lang M, Schmidt J (2021)
Publication Language: English
Publication Type: Journal article, Original article
Publication year: 2021
Book Volume: 197
Article Number: 109265
DOI: 10.1016/j.matdes.2020.109265
The development of a novel polybutylene terephthalate (PBT) feedstock material for powder bed fusion of polymers with laser beam (PBF-LB/P) by means of liquid-liquid phase separation (LLPS) and precipitation is outlined. Appropriate solvents for precipitation have been identified by a screening approach based on solubility parameters. Feasible system compositions, and solution and cloud point temperatures were determined. For the most promising solvent cyclopentanone, a parameter study on the influence of stirring conditions during precipitation was performed. The obtained products were characterized with respect to their particle size distribution, particle shape, phase morphology, thermal properties and melt viscosity. Under optimized process conditions, PBT particles of high degree of crystallinity with narrow size distribution and a mean diameter of 36 μm were obtained; flowability was improved by dry coating. The initial PBF-LB/P processability was assessed by building single layers in a parameter study using a Formiga P110 machine. Dense single layers were obtained at laser power PL = 11.5 W, scanning speed vS = 4000 mm/s, hatch distance hS = 0.24 mm and layer thickness dS = 0.1 mm. Best to the authors' knowledge, this is the first study in the open literature reporting on a PBT feedstock material obtained by liquid-liquid phase separation and crystallization.
APA:
Dechet, M., Gomez Bonilla, J.S., Grünewald, M., Popp, K., Rudloff, J., Lang, M., & Schmidt, J. (2021). A novel, precipitated polybutylene terephthalate feedstock material for powder bed fusion of polymers (PBF): Material development and initial PBF processability. Materials & Design, 197. https://doi.org/10.1016/j.matdes.2020.109265
MLA:
Dechet, Maximilian, et al. "A novel, precipitated polybutylene terephthalate feedstock material for powder bed fusion of polymers (PBF): Material development and initial PBF processability." Materials & Design 197 (2021).
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