摘要:
The present invention relates to a sheet-form prepreg which comprises a plurality of carbon fibers and a matrix resin with which the plurality of carbon fibers are impregnated. This matrix resin contains a thermosetting resin, a curing agent, conductive particles of 1 μm or smaller in diameter, conductive particles of 5 μm or larger in diameter and thermoplastic resin particles, and the conductive particles of 1 μm or smaller in diameter, the conductive particles of 5 μm or larger in diameter and the thermoplastic resin particles are each disproportionately distributed in a specific part of the prepreg.By the present invention, a prepreg from which a carbon fiber-reinforced composite material having both excellent impact resistance and good conductivity in the lamination direction can be produced is provided.
摘要:
The present invention relates to a method for producing a polymer electrolyte molded article, which comprises forming a polymer electrolyte precursor having a protective group and an ionic group, and deprotecting at least a portion of protective groups contained in the resulting molded article to obtain a polymer electrolyte molded article. According to the present invention, it is possible to obtain a polymer electrolyte material and a polymer electrolyte molded article, which are excellent in proton conductivity and are also excellent in fuel barrier properties, mechanical strength, physical durability, resistance to hot water, resistance to hot methanol, processability and chemical stability. A polymer electrolyte fuel cell using a polymer electrolyte membrane, polymer electrolyte parts or a membrane electrode assembly can achieve high output, high energy density and long-term durability.
摘要:
The present invention provides a prepreg comprising the following constituent elements (A), (B) and (C), the constituent element (A) being arranged on one surface or both surfaces of a layer containing the constituent elements (B) and (C), and not less than 90 area % of the constituent element (A) existing in the region from the surface of the prepreg to a position up to 20% of the average thickness of said prepreg: (A) epoxy particles having a tan δ at 10° C. of not less than 0.15 and having a three-dimensional cross-linked structure; (B) a first epoxy resin composition; and (C) reinforcing fibers. The present invention provides a prepreg suitable for formation of a fiber reinforced composite material having an excellent stiffness, strength, and damping performance.
摘要:
The present invention relates to a sheet-form prepreg which comprises a plurality of carbon fibers and a matrix resin with which the plurality of carbon fibers are impregnated. This matrix resin contains a thermosetting resin, a curing agent, conductive particles of 1 μm or smaller in diameter, conductive particles of 5 μm or larger in diameter and thermoplastic resin particles, and the conductive particles of 1 μm or smaller in diameter, the conductive particles of 5 μm or larger in diameter and the thermoplastic resin particles are each disproportionately distributed in a specific part of the prepreg.By the present invention, a prepreg from which a carbon fiber-reinforced composite material having both excellent impact resistance and good conductivity in the lamination direction can be produced is provided.
摘要:
Disclosed is a carbon-fiber-reinforced composite material that is suitable for use as a construction material and exhibits high mechanical strength in harsh usage environments such as low-temperature environments and high-temperature moisture-absorbing environments. Also disclosed are an epoxy resin composition for producing the aforementioned carbon-fiber-rein-forced composite material and a prepreg obtained through the use of said epoxy resin composition. Said epoxy resin composition comprises at least the following constituents, by mass with respect to the total mass of the composition: (A) between 20% and 80% of an epoxy resin having the structure represented by formula (1); and (B) between 10% and 50% of an epoxy resin that has at least two ring structures with four or more members each and also has one amine glycidyl or ether glycidyl directly connected to a ring structure.
摘要:
Disclosed is a fiber-reinforced composite material that is high in heat resistance and strength while being low in the content of volatile matter that volatilizes during curing. Also disclosed are an epoxy resin composition for production thereof, and a prepreg produced from the epoxy resin composition. Specifically the invention provides an epoxy resin composition comprising: [A] an epoxy resin comprising two or more ring structures each consisting of four or more members, and at least one amine type or ether type glycidyl group directly connected to the ring structures, [B] a tri- or more-functional epoxy resin, and [C] a curing agent, and also provides a prepreg produced by impregnating reinforcing fiber with the epoxy resin composition and a fiber-reinforced composite material produced by curing the prepreg.
摘要:
Provided are: a fiber-reinforced composite material which has mode I interlaminar fracture toughness, mode II interlaminar fracture toughness and compressive strength under heat and humidity conditions at the same time; an epoxy resin composition for obtaining the fiber-reinforced composite material; and a prepreg which is obtained using the epoxy resin composition. An epoxy resin composition for fiber-reinforced composite materials, which contains at least the following constituent elements (A), (B), (C) and (D). (A) An epoxy resin (B) Resin particles that satisfy the following conditions (b1)-(b3) and are insoluble in an epoxy resin (b1) The particle size distribution index is 1.0-1.8. (b2) The particle sphericity is 90 or more. (b3) The glass transition temperature of the particles is 80-180° C. (C) At least one elastomer component that is selected from among block copolymers containing a block having a glass transition temperature of 20° C. or less and rubber particles (D) An epoxy resin curing agent
摘要:
Provided are a fiber-reinforced composite material excellent in heat resistance and strength properties, an epoxy resin composition to obtain the fiber-reinforced composite material, and a prepreg obtained by using the epoxy resin composition. Further provided are a fiber-reinforced composite material having less volatile matters during the curing time, and having excellent heat resistance and strength properties, an epoxy resin composition to obtain the fiber-reinforced composite material, and a prepreg obtained by using the epoxy resin composition. Provided are: an epoxy resin composition for a fiber-reinforced composite material, comprising an amine type epoxy resin [A], an aromatic amine curing agent [B], and a block copolymer [C] having a reactive group capable of reacting with an epoxy resin; a prepreg obtained by impregnating a reinforced fiber with the epoxy resin composition; and a fiber-reinforced composite material obtained by curing the prepreg. Further provided are: an epoxy resin composition comprising an epoxy resin [A] having two or more of four- or more-membered ring structures, and having either one of a glycidyl amino group directly bonded to the ring structure or a glycidyl ether group directly bonded to the ring structure, epoxy resin [B] having three or more of functional groups, a curing agent [C], and an elastomer component [D]; a prepreg obtained by impregnating a reinforced fiber with the epoxy resin composition; and a fiber-reinforced composite material obtained by curing the prepreg.
摘要:
A fiber reinforced composite material having high interlaminar toughness and compressive strength under wet heat conditions, as well as an epoxy resin composition for production thereof and a prepreg producible from the epoxy resin composition is described. The prepreg includes at least constituents [A], [B], and [C] as specified below and reinforcement fiber, wherein 90% or more of constituent [C] exists in the depth range accounting for 20% of the prepreg thickness from the prepreg surface: [A] epoxy resin; [B] epoxy resin curing agent; and [C] polymer particles insoluble in epoxy resin.
摘要:
The invention provides a fiber reinforced composite material having high interlaminar toughness and compressive strength under wet heat conditions, as well as an epoxy resin composition for production thereof and a prepreg producible from the epoxy resin composition.The prepreg comprises at least constituents [A], [B], and [C] as specified below and reinforcement fiber, wherein 90% or more of constituent [C] exists in the depth range accounting for 20% of the prepreg thickness from the prepreg surface: [A] epoxy resin [B] epoxy resin curing agent [C] polymer particles insoluble in epoxy resin and falling under any of the following [Cx] to [Cz]: [Cx] polymer particles insoluble in epoxy resin and giving a particle diameter distribution chart meeting the following requirements from (x-i) to (x-iii): (x-i) the chart has at least two peaks, (x-ii) the particles giving the two highest peaks have a diameter ratio in the range of 1.5 to 7, and (x-iii) the one of the two highest peaks attributable to the larger-diameter particle has a half-value width in the range of 1.1 to 3, [Cy] polymer particles insoluble in epoxy resin and meeting the following requirements from (y-i) to (y-iii): (y-i) the average particle diameter is in the range of 1 to 18 μm, (y-ii) the particle sphericity is in the range of 90 to 100, and (y-iii) the glass transition temperature is in the range of 80 to 155° C., [Cz] polymer particles insoluble in epoxy resin and meeting the following requirements from (z-i) to (z-iii): (z-i) the average particle diameter is more than 12 μm and 50 μm or less, (z-ii) the particle sphericity is in the range of 90 to 100, and (z-iii) the glass transition temperature is in the range of 80 to 155° C.