The Influence of Rheology on Melt Processing Conditions of Amorphous Thermoplastics for Big Area Additive Manufacturing (BAAM)

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Ajinjeru, Christine
Kishore, Vidya
Chen, Xun
Lindahl, John
Sudbury, Zeke
Hassen, Ahmed Arabi
Kunc, Vlastimil
Post, Brian
Love, Lonnie
Duty, Chad

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University of Texas at Austin


This paper evaluates the influence of the rheological behavior of thermoplastics used in Big Area Additive Manufacturing (BAAM) on the melt processing conditions. An extensive rheological characterization has been conducted of two base resins; acrylonitrile butadiene styrene (ABS) and polyphenylsulfone (PPSU) as well as their composites containing reinforcing fibers. It was found that the unique processing conditions for each material is highly dependent on the rheological properties of these polymeric systems. A method is presented for considering rheological characteristics when selecting candidate materials suitable for the BAAM system and in developing processing bounds to achieve required material properties for applications such as high temperature tooling and composite structures.


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