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Fabrication of Extruded Polyphenylsulfone – Boron Nitride Composite TapesPolyphenylsulfone (PPSU) is a high-temperature, chemically resistant thermoplastic with high impact resistance that is often used in interior aircraft cabin components, medical devices, and membranes. The aforementioned properties have led to interest investigating PPSU’s compatibility with hexagonal boron nitride (hBN) platelets as a thermally conductive, electrical composite insulator for high power-density electric machines. Preliminary trials extruding PPSU-hBN composite tapes showed promising dielectric properties and higher thermal conductivity as a function of hBN concentration compared to their neat analog. On the other hand, only few studies have reported on the extrusion process and resulting thermo-mechanical properties for PPSU and its composites made with chopped fiber reinforcement or fillers, none of which containing boron nitride filler. Prospects may exist for this type of material to be incorporated into extrusion-based additive manufacturing techniques to print other composites bearing unique properties useful for aerospace. Loading levels with up to approximately 23 wt% were achieved using micro-size BN platelets without observing any significant affects to PPSU’s glass-transition temperature. This work includes a description of the rheological properties of PPSU, the extrusion parameters for mixing and compounding the PPSU-hBN composite tapes, and the thermal and thermo-mechanical properties of PPSU-hBN composites.
Document ID
Acquisition Source
Glenn Research Center
Document Type
Conference Paper
Tiffany S. Williams
(Glenn Research Center Cleveland, Ohio, United States)
Baochau Nguyen
(Universities Space Research Association Columbia, Maryland, United States)
Witold K. Fuchs
(University of Southern Mississippi Hattiesburg, Mississippi, United States)
Marisabel Kelly
(Glenn Research Center Cleveland, Ohio, United States)
Date Acquired
January 7, 2021
Subject Category
Chemistry And Materials (General)
Meeting Information
Meeting: SAMPE 2021 Conference & Exhibition
Location: Long Beach, CA
Country: US
Start Date: May 24, 2021
End Date: May 27, 2021
Sponsors: Society for the Advancement of Material and Process Engineering
Funding Number(s)
WBS: 081876.
Distribution Limits
Portions of document may include copyright protected material.
Technical Review
Single Expert
boron nitride
high temperature thermoplastics
thermoplastic composites
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