Ultrahigh strength carbon fibers

Chemistry of inorganic compounds – Carbon or compound thereof – Elemental carbon

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Details

4234472, 4234477, 264 292, D01C 506, D01F 922

Patent

active

046379258

ABSTRACT:
An ultrahigh strength carbon fiber having a surface layer having a crystalline completeness which is substantially the same as or higher than that of the central region of the fiber, and a functional group amount ratio (O.sub.ls /C.sub.ls) of 0.1 to 0.4 as detected in the fiber surface by X-ray photoelectron spectroscopy, the surface layer preferably having an ultrathin outermost layer having a lower crystalline completeness than the central region of the fiber.

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patent: 4131644 (1978-12-01), Nagasaka et al.
patent: 4349523 (1982-09-01), Hiramatsu et al.
patent: 4555393 (1985-11-01), Sorensen et al.

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