Abstract
A precursor for a general purpose carbon fiber was prepared from coal tar pitch (CP) modified with 10 % p-benzoquinone (BQ) at 380 ‡C for 3 hours. Such a modification raised the softening of the pitch from 85 ‡C to 271 ‡C at a yield of 43 %. The modified pitch was spun smoothly at a rate of 480 m/min into a fiber of 20 Μm diameter. The fiber was stepwise stabilized at 236 ‡C (5 ‡C/min) and 312 ‡C (1 ‡C/min) for 3 hours at each temperature. Successively,carbonization and graphitization were performed at 1,000 ‡C and 2,400 ‡C, respectively, for one hour. Both the carbonized and graphitized fibers exhibited tensile strength of 570 MPa. The structural parameters of carbon and graphite fibers were their orientation values of 56.2 and 58.1 %, relatively low Lc(002) of 11.24 and 25 å, and large interlayer spacing (d002) of 3.86 and 3.49 å, respectively.
Similar content being viewed by others
References
Brown, J. K. and Lander, W. R., “A Study of the Hydrogen Distribution in Coal-Like Materials by High Resolution Nuclear Magnetic Resonance Spectroscopy. A Comparison with Infrared Measurement and Conversion to Carbon Structure,”Fuel,39, 87 (1963).
Brydson, J. A., “Flow Properties of Polymer Melts,” Butter and Tanner Limited, London, 18 (1981).
Davidson, R. M., in “Nuclear Magnetic Resonance Studies of Coal,” IEA Coal Research, London, 40 (1986).
Donnet, J. B. and Bansal, R. C., “Carbon Fibers,” Marcel Dekker, Inc., New York and Basel, 56 (1990).
Komato, M., Sakai, Y., Korai, Y, Ishida, S., Watanabe, F, Yoon, S.-H., Wang Y.-G., Mochida, I., Kato, I. and Nakamura, T., “Preparation of Carbon Fiber from Isotropie Pitch Containing Mesophase Spheres,”Carbon,35, 1733 (1997).
Maeda, T., Zeng, S. M., Tokumitsu, K., Mondori, J. and Mochida, I., “Preparation of Isotropie Pitch Precursors for General Purpose Carbon Fibers by Air Blowing-I. Preparation of Spinnable Isotropie Pitch Precursor from Coal Tar by Air Blowing,”Carbon,31,407 (1993).
Mochida, I., Yatsunami, S., Kawabuchi, Y. and Nakayama, Y., “Influence of Heat Treatmnet on the Selective Adsorption of CO2 in a Model Natural Gas over Molecular Sieve Carbons,”Carbon,33,1611 (1995).
Otani, S., Okuda, K. and Matsuda, H. S., “Carbon Fiber,” Kindai Henshu Ltd., Tokyo Japan, 175 (1983).
Otani, S., U. S. Patent, 3,629,379, 1971.
Yang. K. S., Lee, D. J., Choi, J. H., Kumagai, H. and Sanada, Y, “Reaction of Coal Tar Pitch with p-Benzoquinone,” in Extended Abstracts of 21st Annual Meeting of the Carbon Society of Japan, Tokyo, 80 (1994).
Zeng, S. M., Maeda, T., Mondori, J., Tokumitsu, K. and Mochida, I., “Preparation of Isotropie Pitch Precursors for General Purpose Carbon Fibers by Air Blowing-Ill. Air Blowing of Isotropie Naphthalene and Hydrogenated Coal Tar Pitch with Addition of 1,8-Dinitronaphthalene,”Carbon,31, 421 (1993a).
Zeng, S. M., Maeda, T., Tokumitsu, T., Mondori, J. and Mochida, I., “Preparation of Isotropie Pitch Precursors for General Purpose Carbon Fibers by Air Blowing-II. Air Blowing of Coal Tar, Hydrogenated Coal Tar, and Petroleum Pitches,”Carbon,31, 413 (1993b).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Yang, K.S., Lee, D.J., Ryu, S.K. et al. Isotropic carbon and graphite fibers from chemically modified coal-tar pitch. Korean J. Chem. Eng. 16, 518–524 (1999). https://doi.org/10.1007/BF02698278
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF02698278