| 主权项 |
1. A prepreg formed by impregnating sizing agent-coated carbon fibers coated with a sizing agent with a thermosetting resin composition, wherein
the sizing agent contains an aliphatic epoxy compound (A) and an aromatic compound (B) at least containing an aromatic epoxy compound (B1), the sizing agent-coated carbon fibers has an (a)/(b) ratio of 0.50 to 0.90 where (a) is a height (cps) of a component at a binding energy (284.6 eV) assigned to CHx, C—C, and C═C and (b) is a height (cps) of a component at a binding energy (286.1 eV) assigned to C—O in a C1s core spectrum of a surface of the sizing agent applied onto the carbon fibers analyzed by X-ray photoelectron spectroscopy using AlK□1,2 as an X-ray source at a photoelectron takeoff angle of 15°, the thermosetting resin composition contains a thermosetting resin (D), a latent curing agent (E), and at least one of the following [1] and [2]:
[1] thermoplastic resin particles or fibers (F) and conductive particles or fibers (G); and[2] conductive particles or fibers (H) whose thermoplastic resin nucleus or core is covered with a conductive substance, when containing [1], the thermosetting resin composition contains the thermoplastic resin particles or fibers (F) and the conductive particles or fibers (G) in a mass ratio of 1:1 to 1,000, and the prepreg includes an interlayer formative layer containing (F) and (G) and/or (H) on a surface of a layer formed of the carbon fibers. |
