Ultrahigh strength carbon fibers

Details Ultrahigh strength carbon fibers Ultrahigh strength carbon fibers

1985-06-20

1986-07-15

Doll, John

Chemistry of inorganic compounds

Carbon or compound thereof

Elemental carbon

4234471, 4234476, 4234478, 264 292, D01C 500, D01F 912, D01F 922

Patent

active

046005722

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.

REFERENCES:
patent: 3746506 (1973-07-01), Aitken et al.
patent: 3859187 (1975-01-01), Druin et al.
patent: 3865705 (1975-02-01), Rieux et al.
patent: 4234398 (1980-11-01), Yamamoto
patent: 4401533 (1983-08-01), Saito et al.

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