JP2014152403A5 - - Google Patents

Claims (19)

At least (A) a carbon fiber coated with a sizing agent containing ~ a (C), the C _1s inner shell spectrum measured by X-ray photoelectron spectroscopy sizing agent surface photoelectron escape angle 15 ° (a) CHx , C—C, the height (cps) of the component of the bond energy (284.6 eV) attributed to C = C and (b) the height of the component of the bond energy (286.1 eV) attributed to C—O A sizing agent-coated carbon fiber having a ratio (a) / (b) of (cps) of 0.50 to 0.90.
(A) Aliphatic epoxy compound (B) Condensation product of unsaturated dibasic acid and alkylene oxide adduct of bisphenols (C) Nonionic surfactant containing an aromatic ring The aliphatic epoxy compound (A) has an epoxy value of 2.0 to 8.0 meq / g, a hydroxyl value of 2.0 to 5.0 meq / g, and two or more epoxy groups in the molecule. Item 2. A sizing agent-coated carbon fiber according to Item 1. The sizing agent-coated carbon fiber according to claim 1 or 2, wherein an interfacial shear strength between the single fiber of the sizing agent-coated carbon fiber and the epoxy resin is 40 MPa or more. The ratio (A) / (B) of the condensate (B) of the aliphatic epoxy compound (A), unsaturated dibasic acid and alkylene oxide adduct of bisphenols contained in the sizing agent is 52 / 48-80 / The sizing agent-coated carbon fiber according to any one of claims 1 to 3, which is 20. When the sizing agent applied by sonicating the sizing agent-coated fiber with an acetonitrile / chloroform mixed solvent was eluted, the ratio of the eluted aliphatic epoxy compound (A) was 100 parts by mass of the sizing agent-coated carbon fiber. Sizing agent application | coating carbon fiber as described in any one of Claim 1 to 4 which is 0.3 mass part or less with respect to this. Glycidyl ether type epoxy compound obtained by reaction of one type of aliphatic epoxy compound (A) selected from glycerol, diglycerol, polyglycerol, trimethylolpropane, pentaerythritol, sorbitol, and arabitol with epichlorohydrin Sizing agent application | coating carbon fiber as described in any one of Claims 1-5 which are these. The sizing agent-coated carbon fiber is assigned to (a) CHx, C-C, C = C in the C _1s core spectrum measured at a photoelectron escape angle of 55 ° by X-ray photoelectron spectroscopy using 400 eV X-rays. Between the height (cps) of the component of the binding energy (284.6 eV) and the height (cps) of the component of the binding energy (286.1 eV) attributed to C—O (a) The sizing agent-coated carbon fiber according to any one of claims 1 to 6, wherein the values of (I) and (II) obtained from / (b) satisfy the relationship of (III).
(I) Value of (a) / (b) on the surface of the sizing agent-coated carbon fiber before sonication (II) Sizing agent adhesion by sonicating the sizing agent-coated carbon fiber in an acetone solvent (A) / (b) value (III) 0.50 ≦ (I) ≦ 0.90 and 0.6 <on the surface of the sizing agent-coated carbon fiber washed to 0.09 to 0.20 mass%. (II) / (I) <1.0 Sizing agent application | coating carbon fiber as described in any one of Claim 1 to 7 which contains an aromatic epoxy compound (D) in the said sizing agent. Sizing agent application | coating carbon fiber of Claim 8 whose aromatic epoxy compound (D) is a bisphenol A type epoxy compound or a bisphenol F type epoxy compound. A method for producing a sizing agent-coated carbon fiber in which a sizing agent containing at least (A) to (C) is applied to carbon fiber, the sizing agent being applied to the carbon fiber, and then in a temperature range of 160 to 260 ° C. The method for producing carbon fiber coated with a sizing agent according to any one of claims 1 to 9, wherein the heat treatment is performed for 30 to 600 seconds.
(A) Aliphatic epoxy compound (B) Condensation product of unsaturated dibasic acid and alkylene oxide adduct of bisphenols (C) Nonionic surfactant containing an aromatic ring A sizing agent-containing liquid obtained by mixing a water emulsion liquid containing at least a condensate (B) of an unsaturated dibasic acid and an alkylene oxide adduct of bisphenols and a composition containing at least an aliphatic epoxy compound (A) The manufacturing method of the carbon fiber for sizing agent application | coating of Claim 10 apply | coated to a fiber. The method for producing sizing agent-coated carbon fiber according to claim 10 or 11, wherein the sizing agent-containing liquid is applied after liquid-phase electrolytic oxidation of the carbon fiber in an alkaline electrolyte. A prepreg comprising the sizing agent-coated carbon fiber according to any one of claims 1 to 9 and a thermosetting resin. The prepreg according to claim 13, wherein the thermosetting resin contains an epoxy compound (E) and a latent curing agent (F). Carbon fiber-reinforced thermoplastic resin composition which comprises a sizing agent applying carbon fibers and thermoplastic resin according to any one of claims 1 9. One or more thermoplastic resins selected from the group consisting of polyarylene sulfide resins, polyether ether ketone resins, polyphenylene ether resins, polyoxymethylene resins, polyester resins, polycarbonate resins, polystyrene resins, polyolefin resins, and polyamide resins The carbon fiber reinforced thermoplastic resin composition according to claim 15. The sizing agent is composed of 1 to 80% by mass of sizing agent-coated carbon fibers formed by adhering to 0.1 to 10.0 parts by mass with respect to 100 parts by mass of carbon fibers, and 20 to 99% by mass of a thermoplastic resin. Item 15. The carbon fiber-reinforced thermoplastic resin composition according to Item 15 or 16. It is a manufacturing method of the carbon fiber reinforced thermoplastic resin composition of Claim 15 or 16 , Comprising: 0.1-10.0 mass parts of said sizing agents are attached with respect to 100 mass parts of carbon fibers , and sizing agent application | coating A method for producing a carbon fiber reinforced thermoplastic resin composition, comprising obtaining carbon fiber and then melt-kneading 1 to 80% by mass of the sizing agent-coated carbon fiber and 20 to 99% by mass of a thermoplastic resin . A carbon fiber reinforced composite material obtained by molding the prepreg according to claim 13 or 14, or the carbon fiber reinforced thermoplastic resin composition according to any one of claims 15 to 17 .