| 摘要 |
PROBLEM TO BE SOLVED: To provide an intermediate material for a fiber reinforced composite having high mechanical strength and excellent weatherability owing to a strong adhesion between the carbon fiber and the resin maintained even under a wet and hot environment, and to provide such a fiber reinforced composite. SOLUTION: This intermediate material comprises carbon fibers and a resin composition comprising a benzoxazine compound containing within the molecule a structural unit I expressed by the following structural formula (I) in which cross section of the single fiber of the carbon fibers is substantially circular (I) wherein R1 represents an aliphatic alkyl group having 1-12 carbons, a cycloalkyl group having 3-8 carbons, a phenyl group or a substituted phenyl group; and to the aromatic ring, a hydrogen atom is bound to at least one carbon at ortho- or para-position to the carbon bound with oxygen atom.
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