Abstract
ATTEMPTS to derive a structural model for high-strength carbon fibres have led to studies of the development of microporosity during heat treatment. X-ray scattering and helium density measurements1 showed that carbonized rayon fibres have a fibrillar structure, with chains of graphite crystallites arranged parallel to the fibre axis and giving rise to needle-shaped micropores between the fibrils. The average diameter of the pores perpendicular to the fibre axis seems to vary from 6 to 20 Å for heat treatments in the range 900°–2,900° C.
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References
Perret, R., and Ruland, W., Paper SS-22, Ninth Carbon Conference, Boston, Mass., June 1969.
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Goan, J. C., and Prosen, S. P., ASTM Symposium, San Francisco, June 1968.
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MIMEAULT, V., MCKEE, D. Surface Areas of Carbon Fibres. Nature 224, 793–794 (1969). https://doi.org/10.1038/224793a0
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DOI: https://doi.org/10.1038/224793a0
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