摘要:
[Object] To provide a proton exchange membrane for a fuel cell having excellent proton conductivity, lower property of swelling with hot water, and excellent durability, as well as a block copolymer forming the proton exchange membrane, and a composition, a molded product, a fuel cell proton exchange membrane electrode assembly, and a fuel cell.[Solving Means] (1) A block copolymer having a hydrophilic segment and a hydrophobic segment and having a structure expressed by Chemical Formula 1 below (where X represents H or a univalent cation, Y represents sulfonyl group or carbonyl group, each of Z and z′ independently represents any of O and S atoms, W represents one or more group selected from the group consisting of direct bond between benzenes, sulfone group and carbonyl group, each of Ar1 and Ar2 independently represents divalent aromatic group, and each of n and m independently represents an integer from 2 to 100), and a molded product, a composition, and a proton exchange membrane, as well as a fuel cell including the proton exchange membrane.
摘要:
A process for producing a syndiotactic α-olefin polymer having high racemic diad fraction and high molecular weight with excellent polymerization activity through a method permitting high-temperature polymerization. The production process comprises polymerizing a monomer that comprises at least one C3-10 α-olefin and a small amount of ethylene, in the presence of an olefin polymerization catalyst comprising a transition metal compound (A) represented by the general formula [1], at least one compound (B) selected from an organoaluminum oxy-compound (b-1), a compound (b-2) that reacts with the transition metal compound (A) to form an ion pair and an organoaluminum compound (b-3), which process for producing a syndiotactic α-olefin polymer satisfies the relationship: 0.001≦PE/PO≦0.030, provided that the molar amounts of ethylene and an α-olefin having 3 to 10 carbon atoms that are fed into a polymerization reactor under a polymerization temperature of not lower than 25° C. are PE and PO, respectively.
摘要翻译:通过允许高温聚合的方法制备具有高的外消旋二单元组分和高分子量的具有优异聚合活性的间同立构α-烯烃聚合物的方法。 该制备方法包括在包含由通式[1]表示的过渡金属化合物(A)的烯烃聚合催化剂存在下聚合包含至少一种C 3-10α-烯烃和少量乙烯的单体, 选自有机铝氧化合物(b-1)中的至少一种化合物(B),与过渡金属化合物(A)反应形成离子对的化合物(b-2)和有机铝化合物(b-3) ),制备间规α-烯烃聚合物的方法满足以下关系:0.001≦̸ PE / PO≦̸ 0.030,条件是进料到聚合反应器中的乙烯和具有3至10个碳原子的α-烯烃的摩尔量 在不低于25℃的聚合温度下分别为PE和PO。
摘要:
A gas detecting apparatus including: a heating resistor exposed to a detected atmosphere, and a control circuit for controlling the heating resistor at two different temperatures, wherein each output voltage from the heating resistor corresponding to the different temperatures is detected when the heating resistor is controlled to the different temperatures, and a state of a gas is obtained based on the detected output voltage. For example, two different offset voltages are set, each potential difference obtained by subtracting each of the offset voltages from corresponding detected output voltages is amplified and the state of the gas is obtained using the amplified potential differences.
摘要:
Disclosed is a proton exchange membrane for use in fuel cells, which not only has improved proton conductivity and resistance to swelling caused by hot water but also has greater durability when used in a fuel cell, as well as a sulfonic acid group-containing segmented block copolymer constituting the proton exchange membrane, a membrane electrode assembly using the proton exchange membrane, and a fuel cell using the membrane electrode assembly. A sulfonic acid group-containing segmented block copolymer, which is a di- or multi-block copolymer including, within a molecule, at least one kind of hydrophilic segment and at least one kind of hydrophobic segment, a 0.5 g/dL solution thereof dissolved in N-methyl-2-pyrrolidone as a solvent showing a logarithmic viscosity measured at 30° C. in the range of 0.5 to 5.0 dL/g, wherein the copolymer has at least one kind of hydrophobic segment represented by Chemical Formula 1, the segment has a structure bound to a group represented by Chemical Formula 2, and the hydrophilic segment has at least one kind of structure represented by Chemical Formula 3 or Chemical Formula 3-2.
摘要:
A power transmission apparatus includes a pulley 1 having a belt attached thereto to transmit the rotating drive force, a hub 2 which connects the pulley to a rotating shaft of a driven device, a bearing 7 which rotatably supports the pulley, and a sleeve ring 5 which is fitted and secured to the pulley and attaches the bearing to the pulley to prevent it relatively moving. The sleeve ring is provided, on its first end opposite to the driven device, with a bent portion 5b against which the bearing abuts to restrict further movement of the bearing. An annular retainer 6 is provided on the portion of the bearing adjacent to the drive device. The bearing is secured to the sleeve ring through the annular retainer by calking a second end 5a of the sleeve ring opposite to the first end. The sleeve ring is provided with a projection 5f which projects in the axial direction from the rear surface of the pulley and a casing 9 is provided with an annular groove 9c which at least partly receives therein the projection.
摘要:
A power transmission device includes a pulley 1 and a hub 2 having an inner hub 21, a rubber damper 22 and an outer hub 23. A hub side engagement portion 24 formed of an elastic material and arranged at either one, or both, of an inner peripheral surface and an outer peripheral surface of the outer hub engages with a pulley side engagement portion 12, which is arranged at a position corresponding to the outer hub, of the pulley in a concavo-convex fitting to thereby constitute a torque transmission structure between the hub and the pulley. The hub side engagement portion and the pulley side engagement portion have a concavo-convex outer shape and mesh with each other. A ring-like dust invasion prevention portion 28 covers a front surface of said concavo-convex fitting.
摘要:
There is disclosed an apparatus comprising: a terahertz wave generation device which generates a terahertz wave; a terahertz wave irradiation device which irradiates an object to be inspected with the terahertz wave; and a scattering intensity detection device which cuts a rectilinear wave of the terahertz wave which has passed through the object to be inspected and which detects an intensity of a scattered wave, and a scattered material such as powder or foam contained in an envelope, a capsule, a container or the like is detected in a non-destructive manner without unsealing the envelope or the like.
摘要:
A technology capable of improving the yield by the trimming of internal properties of a semiconductor device is provided. A semiconductor device is provided with an internal voltage step-down circuit and an internal voltage step-up circuit whose property values (internal voltage and others) are variable, a fuse circuit unit, a JTAG function unit 304 which inputs and retains signals from outside, a control circuit which perform logical operation based on an output signal of the fuse circuit unit and an output signal of the JTAG function unit, and the property values of the internal voltage step-down circuit and the internal voltage step-up circuit are controlled based on a result of the logical operation by the control circuit.
摘要:
A power transmission apparatus includes a pulley 1 having a belt attached thereto to transmit the rotating drive force, a hub 2 which connects the pulley to a rotating shaft of a driven device, a bearing 7 which rotatably supports the pulley, and a sleeve ring 5 which is fitted and secured to the pulley and attaches the bearing to the pulley to prevent it relatively moving. The sleeve ring is provided, on its first end opposite to the driven device, with a bent portion 5b against which the bearing abuts to restrict further movement of the bearing. An annular retainer 6 is provided on the portion of the bearing adjacent to the drive device. The bearing is secured to the sleeve ring through the annular retainer by calking a second end 5a of the sleeve ring opposite to the first end. The sleeve ring is provided with a projection 5f which projects in the axial direction from the rear surface of the pulley and a casing 9 is provided with an annular groove 9c which at least partly receives therein the projection.
摘要:
A video camera includes a shading correction circuit in which a parabolic wave signal is generated and the level thereof is adjusted in accordance with zoom and iris settings of the camera's optical system. After adjustment, the parabolic wave signal is clipped in accordance with a reference level and the clipped parabolic wave signal is used for correcting the shading of the camera's image signal. The clipping of the parabolic correction signal allows for more accurate shading correction.