Abstract
In situ reaction kinetics of bromine intercalation in carbon fibers have been followed by measuring changes in their electrical resistivity during an intercalation and de-intercalation cycle. The study suggests that for well-graphitized P-55(HTT 3000°C) and P-120 carbon fibers the reaction starts instantaneously and most of the charge transfer takes place within the first ten minutes with only 6% Br2 weight uptake. It has also been shown that the threshold bromine vapor pressure lies below 26 Torr for P-120 fibers (Tpseudo ∼ -15°C) and 48 Torr for P-55 HT (Tpseudo ∼ -5°C) and is dependent on the structure of the host carbon fibers. The results have been compared with the earlier ex situ bromination studies on carbon fibers.
Original language | British English |
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Pages (from-to) | 1215-1220 |
Number of pages | 6 |
Journal | Carbon |
Volume | 34 |
Issue number | 10 |
DOIs | |
State | Published - 1996 |
Keywords
- Bromine
- Carbon fibers
- Intercalation
- Resistivity
- Vapor pressure