Carbon fibers and method for producing same

Details Carbon fibers and method for producing same Carbon fibers and method for producing same

1987-02-09

1989-03-21

Doll, John

Chemistry of inorganic compounds

Carbon or compound thereof

Elemental carbon

4234472, 423460, 423461, 204130, D01F 922

Patent

active

048141577

ABSTRACT:
Disclosed are polyacrylonitrile carbon fibers excellent in substrate strength and adhesion to matrix resin wherein average nitrogen content in the whole carbon fibers which is measured by elementary analysis is 0.5-4.5% by weight and average nitrogen concentration (N/C atom number ratio) in the whole carbon fibers which is measured by elementary analysis and surface silicon concentration (Si.sub.2p /C.sub.1s atom number ratio), surface nitrogen concentration (N.sub.1s /C.sub.1s atom number ratio) and surface oxygen concentration (O.sub.1s /C.sub.1s atom number ratio) which are measured by X-ray photoelectron spectroscopy satisfy the following formulas:

REFERENCES:
patent: 3306761 (1967-02-01), Johnson
patent: 3671411 (1972-06-01), Ray et al.
patent: 3759805 (1973-09-01), Chapman et al.
patent: 4009305 (1977-02-01), Fujimaki et al.
patent: 4013527 (1977-03-01), Idota et al.
patent: 4234398 (1980-11-01), Yamamoto
patent: 4600572 (1986-07-01), Hiramatsu et al.

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