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Korean Journal of Chemical Engineering, Vol.16, No.4, 518-524, 1999
Isotropic Carbon and Graphite Fibers from Chemically Modified Coal-Tar Pitch
A precursor for a general purpose carbon fiber was prepared from coal tar pitch (CP) modified with 10% p-benzoquinone (BQ) at 380℃ for 3 hours. Such a modification raised the softening of the pitch from 85℃ to 271℃ at a yield of 43%. The modified pitch was spun smoothly at a rate of 480 m/min into a fiber of 20μm diameter. The fiber was stepwise stabilized at 236℃ (5℃/min) and 312℃(1℃/min) for 3 hours at each temperature. Successively, carbonization and graphitization were performed at 1,000℃ and 2,400℃, respectively, for one hour. Both the carbonized and graphitized fibers exhibited tensile strength of 570MPa. 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 25Å, and large interlayer spacing (d002) of 3.86 and 3.49Å, respectively.
[References]
- Brown JK, Lander WR, Fuel, 39, 87, 1963
- Brydson JA, "Flow Properties of Polymer Melts," Butter and Tanner Limited, London, 18, 1981
- Davidson RM, "Nuclear Magnetic Resonance Studies of Coal," IEA Coal Research, London, 40, 1986
- Donnet JB, Bansal RC, "Carbon Fibers," Marcel Dekker, Inc., New York and Basel, 56, 1990
- Komato M, Sakai Y, Korai Y, Ishida S, Watanabe F, Yoon SH, Wang YG, Mochida I, Kato I, Nakamura T, Carbon, 35, 1733, 1997
- Maeda T, Zeng SM, Tokumitsu K, Mondori J, Mochida I, Carbon, 31, 407, 1993
- Mochida I, Yatsunami S, Kawabuchi Y, Nakayama Y, Carbon, 33, 1611, 1995
- Otani S, Okuda K, Matsuda HS, "Carbon Fiber," Kindai Henshu Ltd., Tokyo Japan, 175, 1983
- Otani S, U.S. Patent, 3,629,379, 1971
- Yang KS, Lee DJ, Choi JH, Kumagai H, 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 SM, Maeda T, Mondori J, Tokumitsu K, Mochida I, Carbon, 31, 421, 1993
- Zeng SM, Maeda T, Tokumitsu T, Mondori J, Mochida I, Carbon, 31, 413, 1993
[Cited By]
- Lee YS, Lee BK, Rho JS, Korean Journal of Chemical Engineering, 20(1), 151, 2003
- Kim P, Joo JB, Kim J, Kim W, Song IK, Yi J, Korean Journal of Chemical Engineering, 23(6), 1063, 2006
- Gao M, Wang X, Xia C, Song N, Ma Y, Wang Q, Yang T, Ge S, Wu C, Lam SS, Korean Journal of Chemical Engineering, 38(1), 64, 2021
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