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Title: The influence of dynamic rheological properties on carbon fiber-reinforced polyetherimide for large-scale extrusion-based additive manufacturing

Abstract

Printing high-performance thermoplastics on large scale extrusion-based additive manufacturing platforms requires stability over a range of processing conditions. Yet, research on the melt dynamics and processing conditions of these thermoplastics in big area additive manufacturing (BAAM) are limited. This report characterizes the dynamic rheological behavior of polyetherimide (PEI), a high-performance thermoplastic, as well as carbon fiber (CF)-reinforced PEI composites as a BAAM feedstock material. The viscoelastic properties, such as the storage and loss moduli and complex viscosity, are investigated in relation to the BAAM extrusion process. The results show that CF-PEI composites behave like a viscous liquid during BAAM extrusion. The addition of CF to PEI enhances the shear thinning effect and significantly increases the complex viscosity (2.5× increase for 20% CF, and 3× for 30% CF). The increased viscosity increases the torque on the extruder, which may be alleviated by increasing the material processing temperature.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2];  [1]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [3];  [1]
  1. Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Purdue Univ., West Lafayette, IN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Advanced Manufacturing Office (EE-5A)
OSTI Identifier:
1564170
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
International Journal of Advanced Manufacturing Technology
Additional Journal Information:
Journal Volume: 99; Journal Issue: 1-4; Journal ID: ISSN 0268-3768
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Large scale additive manufacturing; Carbon fiber-reinforced PEI; Dynamic rheological properties; Additive manufacturing processing conditions; Melt rheology

Citation Formats

Ajinjeru, Christine, Kishore, Vidya, Lindahl, John, Sudbury, Zeke, Hassen, Ahmed Arabi, Post, Brian, Love, Lonnie, Kunc, Vlastimil, and Duty, Chad. The influence of dynamic rheological properties on carbon fiber-reinforced polyetherimide for large-scale extrusion-based additive manufacturing. United States: N. p., 2018. Web. doi:10.1007/s00170-018-2510-z.
Ajinjeru, Christine, Kishore, Vidya, Lindahl, John, Sudbury, Zeke, Hassen, Ahmed Arabi, Post, Brian, Love, Lonnie, Kunc, Vlastimil, & Duty, Chad. The influence of dynamic rheological properties on carbon fiber-reinforced polyetherimide for large-scale extrusion-based additive manufacturing. United States. doi:10.1007/s00170-018-2510-z.
Ajinjeru, Christine, Kishore, Vidya, Lindahl, John, Sudbury, Zeke, Hassen, Ahmed Arabi, Post, Brian, Love, Lonnie, Kunc, Vlastimil, and Duty, Chad. Sat . "The influence of dynamic rheological properties on carbon fiber-reinforced polyetherimide for large-scale extrusion-based additive manufacturing". United States. doi:10.1007/s00170-018-2510-z. https://www.osti.gov/servlets/purl/1564170.
@article{osti_1564170,
title = {The influence of dynamic rheological properties on carbon fiber-reinforced polyetherimide for large-scale extrusion-based additive manufacturing},
author = {Ajinjeru, Christine and Kishore, Vidya and Lindahl, John and Sudbury, Zeke and Hassen, Ahmed Arabi and Post, Brian and Love, Lonnie and Kunc, Vlastimil and Duty, Chad},
abstractNote = {Printing high-performance thermoplastics on large scale extrusion-based additive manufacturing platforms requires stability over a range of processing conditions. Yet, research on the melt dynamics and processing conditions of these thermoplastics in big area additive manufacturing (BAAM) are limited. This report characterizes the dynamic rheological behavior of polyetherimide (PEI), a high-performance thermoplastic, as well as carbon fiber (CF)-reinforced PEI composites as a BAAM feedstock material. The viscoelastic properties, such as the storage and loss moduli and complex viscosity, are investigated in relation to the BAAM extrusion process. The results show that CF-PEI composites behave like a viscous liquid during BAAM extrusion. The addition of CF to PEI enhances the shear thinning effect and significantly increases the complex viscosity (2.5× increase for 20% CF, and 3× for 30% CF). The increased viscosity increases the torque on the extruder, which may be alleviated by increasing the material processing temperature.},
doi = {10.1007/s00170-018-2510-z},
journal = {International Journal of Advanced Manufacturing Technology},
number = 1-4,
volume = 99,
place = {United States},
year = {2018},
month = {8}
}

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Figures / Tables:

Fig. 2 Fig. 2: Determination of the BAAM processing temperature window using DSC and TGA thermograms. DOT is the decomposition onset temperature

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    Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.