Abstract: A radical polymerization method may use a compound having a polycyclic aromatic skeleton and an endoperoxide compound having a polycyclic aromatic skeleton. An endoperoxide compound may have a polycyclic aromatic skeleton of formula (1), and a compound may have a polycyclic aromatic skeleton, which is a raw material of the endoperoxide compound: wherein R is a C1-10 alkyl group, an alkoxymethyl group having a C1-5 alkoxy group, a C6-10 aryl group, an alkylcarbonyl group having a C1-10 alkyl group, an arylcarbonyl group having a C6-20 aryl group, an alkyloxycarbonyl group having a C1-10 alkyl group, an aryloxycarbonyl group having a C6-10 aryl group, an alkyloxycarbonylmethyl group having a C1-12 alkyl group or an aryloxycarbonylmethyl group having a C6-12 aryl group.

Abstract: A material comprising: a support 10; and a brush layer 20 containing a brush-like polymer chain assemblage 21 formed of a plurality of polymer chains and a swelling liquid 22, in which a brush layer 20 is swollen with the swelling liquid 22, the brush layer 20 retaining on the surface a lubricating liquid 30, and the swelling liquid 22 contained in the brush layer 20 and the lubricating liquid 30 being phase-separated to form a liquid-liquid phase separation interface 40 in between and a sliding system using the material.

Abstract: A sheet processing apparatus includes a tray, a first binder, a second binder, a feeder, and circuitry. The tray receives and stores a sheet bundle. The first binder presses the sheet bundle to bind the sheet bundle. The second binder penetrates the sheet bundle with a needle to bind the sheet bundle. The feeder feeds the sheet bundle in a first direction, and moves the sheet bundle in a second direction. The circuitry causes the feeder to move the sheet bundle on the tray in the second direction, moves the first binder from a binding position to a home position different from the binding position, and moves the second binder to the binding position in the width direction to bind the sheet bundle by the second binder after the sheet bundle is moved in the second direction and the first binder is moved to the home position.

Abstract: The present invention provides a surface treatment film that is capable of imparting durability such as wear resistance, friction resistance, chemical resistance, heat resistance, and solvent resistance to the surfaces of various substrates, and that exhibits excellent adhesion to the surfaces of the substrates. The surface treatment film is provided on the surface of a substrate. The surface treatment film has a laminated structure that includes a polymer layer (i) disposed on the surface side of the substrate and a polymer layer (ii) disposed on the polymer layer (i). The polymer layer (i) contains a first polymer derived from a polymerization initiation group-containing polymer, such as a polyester having, in a side chain, a functional group represented by formula (1) wherein R1 represents a hydrogen atom, a methyl group, or the like, R2 represents a methyl group or the like, X represents a chlorine atom or the like, Y represents O or NH, and * shows a bonding position.

Abstract: Provided are: a fine cellulose fiber that is superior in handling properties and that can suitably be used as a reinforcing material or the like for resin; a production method of the fine cellulose fiber; and a slurry and a composite comprising the fine cellulose fibers. The present invention pertains to fine cellulose fibers comprising a carbamate group. The degree of substitution with the carbamate group with respect to hydroxy groups in the fine cellulose fibers is preferably no less than 0.05 and no greater than 0.5. The present invention pertains to a slurry comprising the fine cellulose fibers, to a composite comprising the fine cellulose fibers and a resin, and to a production method of the fine cellulose fibers, comprising performing a heat treatment on a mixture of a plant raw material and urea or the like, and performing a miniaturization treatment of the plant raw material.

Abstract: A material comprising: a support 10; and a brush layer 20 containing a brush-like polymer chain assemblage 21 formed of a plurality of polymer chains and a swelling liquid 22, in which a brush layer 20 is swollen with the swelling liquid 22, the brush layer 20 retaining on the surface a lubricating liquid 30, and the swelling liquid 22 contained in the brush layer 20 and the lubricating liquid 30 being phase-separated to form a liquid-liquid phase separation interface 40 in between and a sliding system using the material.

Abstract: A method for manufacturing a graft polymer, that ensures more stable progress of a living radical polymerization by using a monomer structural unit containing an iodine initiating group as an initiator, includes performing a living radical polymerization of a compound with a vinyl monomer by an organic catalyst to manufacture the graft polymer. The compound has a recurring unit represented by a formula (1) below in a main chain: where, R1: linking group (linear, branched, or cyclic alkylene group having 1 to 30 carbon atoms that may contain an ether bond, an amide bond, or an ester bond, an aromatic group), R2, R3, R4, R5, R6: an aromatic group, an aliphatic group, a hydrogen atom, an aliphatic group, and n=1 to 5.

Abstract: An electroacoustic transducer includes: a diaphragm; a magnetic circuit having a magnetic gap; a frame that holds the diaphragm and the magnetic circuit; a voice coil having one end portion positioned within the magnetic gap and the other end portion coupled to the diaphragm; and a low friction material that is disposed in a sliding portion formed by the voice coil and the magnetic circuit, and includes polymer compounds swollen with liquid.

Abstract: A clearance narrowing material containing a brush-shaped polymer chain aggregate formed of multiple polymer chains immobilized on a substrate. The invention provides a clearance narrowing material which can effectively prevent fluid leakage through a clearance and which does not disturb relative movement of members to form a clearance, and can realize an article in which fluid leakage through a clearance can be effectively prevented and the members to form a clearance can move smoothly.

Abstract: A method for manufacturing a graft polymer, that ensures more stable progress of a living radical polymerization by using a monomer structural unit containing an iodine initiating group as an initiator, includes performing a living radical polymerization of a compound with a vinyl monomer by an organic catalyst to manufacture the graft polymer. The compound has a recurring unit represented by a formula (1) below in a main chain: where, R1: linking group (linear, branched, or cyclic alkylene group having 1 to 30 carbon atoms that may contain an ether bond, an amide bond, or an ester bond, an aromatic group), R2, R3, R4, R5, R6: an aromatic group, an aliphatic group, a hydrogen atom, an aliphatic group, and n=1 to 5.

Abstract: Using an organic compound having a bottle brush structure, a material having softness and resilience and having excellent low-friction performance (SRT material) can be provided. Preferably, the SRT material contains a reinforcing filler, and may contain a lubricating liquid to be gelled.

Abstract: The present invention provides porous particles made of an organic polymer, uniform in shape, and having through holes that are not closed. The porous particles according to the present invention are porous particles having a substantially spherical shape. The porous particles are made of an organic polymer. Each of the porous particles has an interconnected pore structure in which through holes provided inside the porous particle communicate with each other, and ends of the through holes are open toward an outside of the porous particle.

Abstract: The present invention provides a separating medium including porous resin particles which has a sufficient pore diameter suitable for liquid chromatography applications and which has high strength, is reduced in pressure loss during liquid passing, has the excellent property of separating a desired substance, and has low nonspecific adsorption properties. The separating medium of the invention is a separating medium obtained by treating porous epoxy resin particles and having an average pore diameter of 10 to 2,000 nm, or a separating medium obtained by treating porous epoxy resin particles and having a water content of 50% or higher.

Abstract: An electroacoustic transducer includes: a diaphragm; a magnetic circuit having a magnetic gap; a frame that holds the diaphragm and the magnetic circuit; a voice coil having one end portion positioned within the magnetic gap and the other end portion coupled to the diaphragm; and a low friction material that is disposed in a sliding portion formed by the voice coil and the magnetic circuit, and includes polymer compounds swollen with liquid.

Abstract: A clearance narrowing material containing a brush-shaped polymer chain aggregate funned of multiple polymer chains immobilized on a substrate. The invention provides a clearance narrowing material which can effectively prevent fluid leakage through a clearance and which does not disturb relative movement of members to form a clearance, and can realize an article in which fluid leakage through a clearance can be effectively prevented and the members to form a clearance can move smoothly.

Abstract: Provided are: a fine cellulose fiber that is superior in handling properties and that can suitably be used as a reinforcing material or the like for resin; a production method of the fine cellulose fiber; and a slurry and a composite comprising the fine cellulose fibers. The present invention pertains to fine cellulose fibers comprising a carbamate group. The degree of substitution with the carbamate group with respect to hydroxy groups in the fine cellulose fibers is preferably no less than 0.05 and no greater than 0.5. The present invention pertains to a slurry comprising the fine cellulose fibers, to a composite comprising the fine cellulose fibers and a resin, and to a production method of the fine cellulose fibers, comprising performing a heat treatment on a mixture of a plant raw material and urea or the like, and performing a miniaturization treatment of the plant raw material.

Abstract: A seal member has a seal surface exhibiting excellent sealing properties and is any one seal member selected from a gasket, a mechanical seal, a segment seal, a brush seal, a squeeze packing, a lip packing, and a seal ring, in which the seal member has a seal surface on which a polymer brush layer is provided.

Abstract: The invention provides an SRT material (lubricant) applicable to machine elements such as bearings, seals or guides (guiding mechanisms) that constitute a slide part of a machine. A lubricant and an SRT material are disclosed.

Abstract: Using an organic compound having a bottle brush structure, a material having softness and resilience and having excellent low-friction performance (SRT material) can be provided. Preferably, the SRT material contains a reinforcing filler, and may contain a lubricating liquid to be gelled.

Abstract: An object is to establish a technique for producing a resin composite material at low cost. A resin composition contains cellulose fibers, a fibrillation aid, and a resin.