Enhancement of polyamide laser sinter powder reusability by acid catalyzed hydrolysis

Hesse N, Peukert W, Schmidt J (2020)

Publication Language: English

Publication Type: Journal article

Publication year: 2020

Journal

Procedia CIRP Curran

Book Volume: 94

Pages Range: 105-109

DOI: 10.1016/j.procir.2020.09.021

Abstract

This contribution introduces a method to reverse the deterioration in melt rheological behaviour (‘ageing’) of polyamide 12 that has previously been used in powder bed fusion processing by reduction of the polymers molecular weight via acid catalysed hydrolysis. Chosen hydrolysis conditions allow for a reconditioning below melting temperature and therefore leave the particulate nature of the powder intact while significantly improving the polymers rheological properties. The influences of different temperatures, acids and pH-values are investigated and the processability of recycled powders is assessed by melt rheological, optical and thermal characteristics.

Authors with CRIS profile

Nicolas Hesse Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik Wolfgang Peukert Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik Jochen Schmidt Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik

Related research project(s)

Quality assurance system for powders used in selective laser beam melting of polymers (T1) (SFB 814 (T1)) CRC 814 - Additive Manufacturing (SFB 814) July 1, 2017 - Dec. 31, 2020

How to cite

APA:

Hesse, N., Peukert, W., & Schmidt, J. (2020). Enhancement of polyamide laser sinter powder reusability by acid catalyzed hydrolysis. Procedia CIRP, 94, 105-109. https://dx.doi.org/10.1016/j.procir.2020.09.021

MLA:

Hesse, Nicolas, Wolfgang Peukert, and Jochen Schmidt. "Enhancement of polyamide laser sinter powder reusability by acid catalyzed hydrolysis." Procedia CIRP 94 (2020): 105-109.

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