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Preparation and Properties of Nanocomposites from Pristine and Modified SWCNTs of Comparable Average Aspect RatiosLow color, flexible, space-durable polyimide films with inherent and robust electrical conductivity to dissipate electrostatic charge (ESC) have been under investigation as part of a materials development activity for future NASA space missions. The use of single-walled carbon nanotubes (SWCNTs) is one means to achieving this goal. Even though the concentration of SWCNTs needed to achieve ESC dissipation is typically low, it is dependent upon purity, size, dispersion, and functionalization. In this study, SWCNTs prepared by the electric arc discharge method were used to synthesize nanocomposites using the LaRC(TradeMark) CP2 backbone as the matrix. Pristine and functionalized SWCNTs were mixed with an alkoxysilane terminated amide acid of LaRC(TradeMark) CP2 and the soluble imide form of the polymer and the resultant nanocomposites evaluated for mechanical, thermal, and electrical properties. Due to the preparative conditions for the pristine and functionalized SWCNTs, the average aspect ratio for both was comparable. This permitted the assessment of SWCNT functionalization with respect to various interactions (e.g. van der Waals, hydrogen bonding, covalent bond formation, etc.) with the matrix and the macroscopic effects upon nanocomposite properties. The results of this study are described herein.
Document ID
20090026511
Acquisition Source
Langley Research Center
Document Type
Preprint (Draft being sent to journal)
External Source(s)
doi:10.1177/0954008307085009
Authors
Smith, Joseph G. (NASA Langley Research Center Hampton, VA, United States)
Delozier, Donavon M. (National Inst. of Aerospace Hampton, VA, United States)
Watson, Kent A. (National Inst. of Aerospace Hampton, VA, United States)
Connell, John W. (NASA Langley Research Center Hampton, VA, United States)
Bekyarova, E. (California Univ. Riverside, CA, United States)
Haddon, R. (California Univ. Riverside, CA, United States)
Yu, A. (California Univ. Riverside, CA, United States)
Date Acquired
August 24, 2013
Publication Date
December 1, 2008
Publication Information
Publication: High Performance Polymers
Volume: 20
Issue: 6
Subject Category
Composite Materials
Funding Number(s)
WBS: WBS: 612.20.07.12
Distribution Limits
Public
Copyright
Public Use Permitted.

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