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The milling of pristine and brominated P-100 graphite fibersTechniques were developed for the ball milling of pristine and brominated P-100 graphite fibers. Because of the lubrication properties of graphite, large ball loads (50 percent by volume) were required. Use of 2-propanol as a milling medium enhanced the efficiency of the process. Milled brominated P-100 fibers had resistivities which were indistinguishable from milled pristine P-100 fibers. Apparent loss of bromine from the brominated fibers suggests that bromine would not be the intercalate of choice in applications where milled fibers of this type are required. Other intercalates which do not degas may be more appropriate for a milled fiber application. These same results, however, do provide evidence that bromine molecules leave the fiber surface when removed from overpressure of bromine. While exploring possible solvent media for milling purposes, it was found that brominated fibers are stable in a wide variety of organic solvents.
Document ID
19860023101
Document Type
Technical Memorandum (TM)
Authors
Dillehay, M. E. (Cleveland State Univ. Ohio, United States)
Gaier, J. R. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 5, 2013
Publication Date
September 1, 1986
Subject Category
NONMETALLIC MATERIALS
Report/Patent Number
NASA-TM-88828
NAS 1.15:88828
E-3203
Funding Number(s)
PROJECT: RTOP 506-41-4B
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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