Determination of melt processing conditions for high performance amorphous thermoplastics for large format additive manufacturing

Christine Ajinjeru; Vidya Kishore; Peng Liu; John Lindahl; Ahmed Arabi Hassen; Vlastimil Kunc; Brian Post; Lonnie Love; Chad Duty

doi:10.1016/j.addma.2018.03.004

Determination of melt processing conditions for high performance amorphous thermoplastics for large format additive manufacturing

Christine Ajinjeru, Vidya Kishore, Peng Liu, John Lindahl, Ahmed Arabi Hassen, Vlastimil Kunc, Brian Post, Lonnie Love, Chad Duty

Research output: Contribution to journal › Article › peer-review

55 Scopus citations

Abstract

As the application space for large-scale 3D printed components continues to grow, it is necessary to identify appropriate processing conditions for high-performance thermoplastics on large format Additive Manufacturing (LFAM) systems. This study compares the rheological behavior of a high-performance thermoplastic, polyphenylsulfone (PPSU), with that of a commonly used low-temperature polymer, acrylonitrile butadiene styrene (ABS), to identify suitable processing conditions for large format AM systems. The linear viscoelastic properties (complex viscosity, storage modulus, loss modulus, and tan delta) of these materials are evaluated as a function of temperature, angular frequency, and carbon fiber content. Over the range of frequencies of interest to LFAM (10–100 rad/s), ABS behaves more like an elastic solid whereas PPSU behaves more like a viscous liquid. The addition of 20–35% by weight of carbon fiber increased the shear thinning effect of both thermoplastics, showing a potential variation of 2–3 x over the range of expected LFAM extrusion shear rates (10–100 s⁻¹).

Original language	English
Pages (from-to)	125-132
Number of pages	8
Journal	Additive Manufacturing
Volume	21
DOIs	https://doi.org/10.1016/j.addma.2018.03.004
State	Published - May 2018

Funding

Research sponsored by the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Advanced Manufacturing Office, under contract DE-AC05-00OR22725 with UT-Battelle, LLC. The authors also thank Techmer ES and BASF for providing materials used for this work. We are also grateful to Jordan Failla and Andrew Chern for their assistance in preparing the samples for rheology testing and thermal characterization.

Funders	Funder number
U.S. Department of Energy
Advanced Manufacturing Office	DE-AC05-00OR22725
Office of Energy Efficiency and Renewable Energy

Keywords

Additive manufacturing processing conditions
Carbon fiber reinforced PPSU
High performance thermoplastics
Large format additive manufacturing
Polymer melt rheology

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.addma.2018.03.004

Cite this

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title = "Determination of melt processing conditions for high performance amorphous thermoplastics for large format additive manufacturing",

abstract = "As the application space for large-scale 3D printed components continues to grow, it is necessary to identify appropriate processing conditions for high-performance thermoplastics on large format Additive Manufacturing (LFAM) systems. This study compares the rheological behavior of a high-performance thermoplastic, polyphenylsulfone (PPSU), with that of a commonly used low-temperature polymer, acrylonitrile butadiene styrene (ABS), to identify suitable processing conditions for large format AM systems. The linear viscoelastic properties (complex viscosity, storage modulus, loss modulus, and tan delta) of these materials are evaluated as a function of temperature, angular frequency, and carbon fiber content. Over the range of frequencies of interest to LFAM (10–100 rad/s), ABS behaves more like an elastic solid whereas PPSU behaves more like a viscous liquid. The addition of 20–35% by weight of carbon fiber increased the shear thinning effect of both thermoplastics, showing a potential variation of 2–3 x over the range of expected LFAM extrusion shear rates (10–100 s−1).",

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author = "Christine Ajinjeru and Vidya Kishore and Peng Liu and John Lindahl and Hassen, {Ahmed Arabi} and Vlastimil Kunc and Brian Post and Lonnie Love and Chad Duty",

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AU - Post, Brian

AU - Love, Lonnie

AU - Duty, Chad

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AB - As the application space for large-scale 3D printed components continues to grow, it is necessary to identify appropriate processing conditions for high-performance thermoplastics on large format Additive Manufacturing (LFAM) systems. This study compares the rheological behavior of a high-performance thermoplastic, polyphenylsulfone (PPSU), with that of a commonly used low-temperature polymer, acrylonitrile butadiene styrene (ABS), to identify suitable processing conditions for large format AM systems. The linear viscoelastic properties (complex viscosity, storage modulus, loss modulus, and tan delta) of these materials are evaluated as a function of temperature, angular frequency, and carbon fiber content. Over the range of frequencies of interest to LFAM (10–100 rad/s), ABS behaves more like an elastic solid whereas PPSU behaves more like a viscous liquid. The addition of 20–35% by weight of carbon fiber increased the shear thinning effect of both thermoplastics, showing a potential variation of 2–3 x over the range of expected LFAM extrusion shear rates (10–100 s−1).

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Determination of melt processing conditions for high performance amorphous thermoplastics for large format additive manufacturing

Abstract

Funding

Keywords

UN SDGs

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