Provided is a thermosetting resin composition which achieves both high heat resistance and high bending strength as a fiber-reinforced composite material, and also has rapid curability that enables high cycle press forming, thermal stability, and storage stability. The thermosetting resin composition of the present invention is a thermosetting resin composition comprising an epoxy resin, an epoxy resin curing agent, an imidazole compound, and an epoxy resin curing accelerator, in which the epoxy resin curing agent is dicyandiamide or a derivative thereof, and the epoxy resin curing accelerator comprises a urea derivative having two or more dimethylureido groups in a molecule.

Systems and techniques to provide a flexible, lightweight material that is also effective at protecting a body from ballistic threats are described. An example composite material described herein is fiber-based, and it includes one or more first regions where the fiber composite material is consolidated, and one or more second regions where the fiber composite material is unconsolidated. Example methods of manufacturing the composite material disclosed herein include using a specialized tool with a heated platen press or an autoclave. The tool may include one or more protrusions and/or cavities that contact a precursor composite material to transform the precursor material into a partially consolidated fiber composite material, which is suitable for use as body armor, among other potential applications for the manufactured composite material.

A resin composition contains a resin component (A) and a phosphorus-containing flame retardant (B). The resin component (A) contains an epoxy resin (a1), of which the viscosity at 25° C. is equal to or less than 50000 mPa.Math.s. The proportion of the epoxy resin (a1) to the resin component (A) is equal to or greater than 20% by mass. The phosphorus-containing flame retardant (B) includes a phosphorus-containing flame retardant (B1) that neither melts nor thermally decomposes at a temperature lower than 150° C.

The present invention provides a resin composition for a fiber-reinforced plastic, the resin composition including a cyanate ester (A), an epoxy resin (B), and an aromatic amine-based curing agent that is liquid at 25° C. (C), wherein the average number of cyanate groups in the cyanate ester (A) is 2.1 or greater, and/or the average number of epoxy groups in the epoxy resin (B) is 2.1 or greater. A fiber-reinforced plastic that is produced using this composition and a reinforcing fiber has favorable heat resistance and excellent tensile and bending properties, and therefore can be applied to a wide variety of fields including transport vehicles such as ships, automobiles, and aircrafts, sporting goods, building materials such as sinks and window frames, as well as industrial machinery and materials such as high-pressure gas tanks and blades for wind power generation.

A method of recycling a polymer structure includes converting a first polymer structure into feedstock. The first polymer structure comprises particles that are bonded to one another by chemical click bonds to form a first shape. The first polymer structure is converted into feedstock particles by breaking the click bonds. The feedstock particles are formed into a second shape, and the feedstock particles are chemically click-bonded together to form a second polymer structure having a second shape. Breaking the click bonds may include heating the particles. The structures may be formed by causing first particles having dienes to chemically bond to dienophiles of second particles.

A quantum dot film, a method of preparing the same, and a display device are disclosed. The quantum dot film includes a quantum dot layer and a plurality of protection layers. The quantum dot layer includes a plurality of red quantum dots, green quantum dots and scattering particles, which are uniformly dispersed in a high molecular polymer substrate. Material of the plurality of scattering particles is high refractive index material with a particle size ranging from 200 nm to 1 μm. By the plurality of scattering particles with a high refractive index disposed in the quantum dot layer, the self-absorption phenomenon between a plurality of quantum dots is reduced, and a light extraction rate is improved.

An epoxy resin represented by the following formula (1), in which in a total amount of an epoxy compound represented by n=1 in the epoxy resin of the above formula, a total content of an epoxy compound represented by the following formula (2) and an epoxy compound represented by the following formula (3) is 1 area % or more and less than 70 area % in HPLC area percentage.

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Provided are a prepreg in which reinforcing fibers are impregnated with an epoxy resin composition containing an epoxy resin (A) and an epoxy resin curing agent (B) containing a reaction product (X) of a component (x1) and a component (x2) described below, a fiber-reinforced composite material that is a cured product of the prepreg, a method for producing the prepreg, and a method for producing a high-pressure gas storage tank.

(x1) At least one selected from the group consisting of meta-xylylenediamine and para-xylylenediamine

(x2) At least one selected from the group consisting of unsaturated carboxylic acids represented by General Formula (1) below and derivatives thereof.

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(In Formula (1), R.sup.1 and R.sup.2 each independently represent a hydrogen atom, an alkyl group having from 1 to 8 carbons, an aryl group having from 6 to 12 carbons, or an aralkyl group having from 7 to 13 carbons.)

A prepreg contains a base material containing a reinforcing fiber and a semi-cured product of a resin composition impregnated into the base material containing a reinforcing fiber. The prepreg after cured has a glass transition temperature (Tg) which is higher than or equal to 150° C. and lower than or equal to 220° C. The resin composition contains (A) a thermosetting resin and (B) at least one compound selected from a group consisting of core shell rubber and a polymer component having a weight average molecular weight of 100000 or more. An amount of the (B) component is higher than or equal to 30 parts by mass and lower than or equal to 100 parts by mass with respect to 100 parts by mass of the (A) component.

A nanocomposite, comprising a carbonaceous perimorph, the perimorph comprising at least one cell. The cell comprises a cell wall possessing an average thickness of less than 100 nm and a morphology evolved from a template. The composite comprises an interior space having a morphology evolved from the template with a diameter between 10 nm and 1,000 nm, and one of a linear structure, a non-linear structure, and an infiltrated endomorph. The endomorph substantially fills the interior space of the perimorph.