Infiltration behavior of liquid thermosets in thermoplastic powders for additive manufacturing of polymer composite parts in a combined powder bed fusion process

Setter R, Riedel F, Peukert W, Schmidt J, Wudy K (2021)

Publication Language: English

Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2021

Journal

Polymer Composites Wiley-Blackwell

Publisher: John Wiley and Sons Inc

DOI: 10.1002/pc.26221

Abstract

Polymer-based multimaterial additive manufacturing (AM) has developed into one of the most promising technologies of recent times. A processing concept was developed in previous studies, which targets the implementation of reactive liquids in a thermoplastic powder-bed for the creation of multimaterial polymer composite parts. This process aims to be the first AM process of its kind to fully utilize the potentials of both thermoplastic and thermoset polymers simultaneously. A highly important aspect for this process is the investigation of the infiltration behavior of the reactive liquids within the powder bed, since premature or delayed curing of the liquids could lead to deviations from the intended geometry as well as process errors due to material protrusions. This investigation presents an experimental and a mathematical approach to describe and predict the time which a droplet needs to completely infiltrate the powder bed. The results showed, that the experimental setup is viable to observe the droplet height over time at temperatures of up to 105°C and infiltration times below 500 ms. The mathematical model proved to be a powerful approximation to describe the infiltration behavior of a reactive liquid within a thermoplastic powder bed once a material-specific form factor is determined for each powder material. Through the process of elimination, the independence of the form factor was demonstrated for different powder parameters like the particle size. A theory is presented, which correlates the form factor to the microstructural shape and surface condition of the particles based on SEM images.

Authors with CRIS profile

Florentin Riedel Lehrstuhl für Partikelsynthese (LFG) Wolfgang Peukert Lehrstuhl für Partikelsynthese (LFG) Jochen Schmidt Lehrstuhl für Partikelsynthese (LFG) Katrin Wudy Sonderforschungsbereich 814/3 Additive Fertigung

Related research project(s)

Laser beam melting of plastics with reactive liquids (B7) (SFB 814 (B7)) CRC 814 - Additive Manufacturing (SFB 814) July 1, 2019 - June 30, 2023 Production of functional polymer particles via liquid-based top-down processes (A1) (SFB 814 (A1)) CRC 814 - Additive Manufacturing (SFB 814) July 1, 2011 - June 30, 2023 Herstellung von Partikeln für das selektive Lasersintern über Flüssig-Flüssig-Phasenseparation und Fällung (SPP2122) July 1, 2018 - June 30, 2021

Involved external institutions

Technische Universität München (TUM) DE Germany (DE)

How to cite

APA:

Setter, R., Riedel, F., Peukert, W., Schmidt, J., & Wudy, K. (2021). Infiltration behavior of liquid thermosets in thermoplastic powders for additive manufacturing of polymer composite parts in a combined powder bed fusion process. Polymer Composites. https://doi.org/10.1002/pc.26221

MLA:

Setter, Robert, et al. "Infiltration behavior of liquid thermosets in thermoplastic powders for additive manufacturing of polymer composite parts in a combined powder bed fusion process." Polymer Composites (2021).

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