Transverse Sphere and Texture of Carbon Fibers Prepared through Cross Shaped Nozzles of Different Lobe Dimensions
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- Korai Yozo
- Institute of Advanced Material Study Kyushu University
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- Oka Hidetoshi
- Institute of Advanced Material Study Kyushu University
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- Hong Seong-Hwa
- Institute of Advanced Material Study Kyushu University
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- Mochida Isao
- Institute of Advanced Material Study Kyushu University
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- Kato Isamu
- Central Research Institute Nissekimitsubishi Oil Co.
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Abstract
Methylnaphthalene derived mesophase pitch was spun through Y- and cross- shaped nozzles of different lobe dimensions in temperature range of 280 to 295℃ by fixing the spinning rate to evaluate die-swelling phenomena which deformed cross-sectional shape and domain alignment of the carbon fiber. The higher temperature of spinning enhanced the deformation through the lower viscosity. The thinner lobe emphasized the die-swelling through the larger shear rate, which reduces the viscosity, although the nozzles of the present study had the same cross-sectional area Shape factors of the nozzle and fiber describe the extents of cause and results of die-swelling, respectively. Die-swelling is found to change the radial type alignment of the constituent domains to random order. The degrees of preferred orientation along the fiber axis were slightly influenced by die-swelling. The pressure in spinning and the nozzle shape were correlated to the deformation extent of the resultant fiber.
Journal
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- 九州大学機能物質科学研究所報告
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九州大学機能物質科学研究所報告 13 (1), 7-11, 1999-07-08
Institute of Advanced Material Study Kyushu University
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Details 詳細情報について
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- CRID
- 1390853649765668224
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- NII Article ID
- 110006177554
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- NII Book ID
- AN10060378
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- ISSN
- 09143793
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- DOI
- 10.15017/7904
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- HANDLE
- 2324/7904
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- NDL BIB ID
- 4784386
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- Text Lang
- en
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- Data Source
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- JaLC
- IRDB
- NDL
- CiNii Articles
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- Abstract License Flag
- Allowed