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.
Rosenberg, A. J., J. Amer. Chem. Soc., 78, 2929 (1956).
Gregg, S. J., and Sing, K. S. W., Adsorption, Surface Area and Porosity, 86 (Academic Press, New York, 1967).
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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