摘要:
Disclosed herein are an epoxy resin composition for fiber-reinforced composite materials which has low viscosity, high Tg, high elastic modulus, and excellent fracture toughness and a fiber-reinforced composite material using such an epoxy resin composition which has excellent thermal properties, compressive strength, impact resistance, fatigue resistance, and open-hole tensile strength and which is suitable for producing structural parts of aircraft and the like. The epoxy resin composition comprises at least a given bifunctional epoxy resin as a component (A), a liquid aromatic diamine curing agent as a component (B), and core-shell polymer particles as a component (C), wherein the core-shell polymer particles as the component (C) contain epoxy groups in their shell and have a volume-average particle size of 50 to 300 nm.
摘要:
Disclosed herein are an epoxy resin composition for fiber-reinforced composite materials which has low viscosity, high Tg, high elastic modulus, and excellent fracture toughness and a fiber-reinforced composite material using such an epoxy resin composition which has excellent thermal properties, compressive strength, impact resistance, fatigue resistance, and open-hole tensile strength and which is suitable for producing structural parts of aircraft and the like. The epoxy resin composition comprises at least a given bifunctional epoxy resin as a component (A), a liquid aromatic diamine curing agent as a component (B), and core-shell polymer particles as a component (C), wherein the core-shell polymer particles as the component (C) contain epoxy groups in their shell and have a volume-average particle size of 50 to 300 nm.
摘要:
A binder composition comprising [A] an amorphous polyamide with a glass transition temperature of 140° C. or higher having a dicyclohexylmethane skeleton in the molecule and [B] a sulfonamide compound is used to provide a binder composition, a reinforcing-fiber base material and a preform respectively most suitable for RTM, which respectively exhibit excellent impact resistance and physical properties remaining stable over the variations of molding conditions and can be used for producing a fiber-reinforced composite material most suitable for members such as primary structures of aircraft.
摘要:
A binder composition comprising [A] an amorphous polyamide with a glass transition temperature of 140° C. or higher having a dicyclohexylmethane skeleton in the molecule and [B] a sulfonamide compound is used to provide a binder composition, a reinforcing-fiber base material and a preform respectively most suitable for RTM, which respectively exhibit excellent impact resistance and physical properties remaining stable over the variations of molding conditions and can be used for producing a fiber-reinforced composite material most suitable for members such as primary structures of aircraft.
摘要:
There is provided a prepreg which contains components (A) to (C) as mentioned below, wherein the component (A) is arranged on one surface or both surfaces of a layer comprising the components (B) and (C): (A) a nonwoven fabric comprising a thermoplastic elastomer and/or a polyolefin each of which has a value of tan θ of 0.06 or more at 10° C. as measured in a viscoelasticity measurement and is incompatible with the component (B); (B) a first epoxy resin composition; and (C) a reinforcing fiber. There are also provided a fiber-reinforced composite material which has excellent rigidity, strength, and vibration-damping performance, a prepreg which can be used suitably for the production of the fiber-reinforced composite material, and a process for producing the prepreg.
摘要:
A prepreg containing a carbon fiber [A] and a thermosetting resin [B], and in addition, satisfying at least one of the following (1) and (2).(1) a thermoplastic resin particle or fiber [C] and a conductive particle or fiber [D] are contained, and weight ratio expressed by [compounding amount of [C] (parts by weight)]/[compounding amount of [D] (parts by weight)] is 1 to 1000.(2) a conductive particle or fiber of which thermoplastic resin nucleus or core is coated with a conductive substance [E] is contained.
摘要:
The present invention relates to a composite material using titanium or a titanium alloy, and concerns such a composite material obtained through processes in which after an imidazole compound has been applied to the surface of titanium or a titanium alloy, an adhered is adhered thereto. The composite material of the present invention is obtained by adhering the adhere thereto by using an adhesive resin composition containing a thermoplastic resin having a fracture energy release rate G1C of 4500 J/m2 or more. The present invention makes it possible to provide a composite material using titanium or a titanium alloy, which exerts a superior adhesive strength stably at room temperature as well as even after exposure to a high-temperature, high humidity condition.
摘要翻译:本发明涉及使用钛或钛合金的复合材料,并且涉及这样的复合材料,其通过在将咪唑化合物施加到钛或钛合金的表面之后附着到其上的方法获得。 本发明的复合材料通过使用含有断裂能释放速率G1C为4500J / m 2以上的热塑性树脂的粘合性树脂组合物来粘附附着物而获得。 本发明使得可以提供使用钛或钛合金的复合材料,其在室温下以及甚至在暴露于高温,高湿度条件之后都能稳定地发挥优异的粘合强度。
摘要:
An electrically conductive composite fiber comprising an electrically conductive layer formed of a polyester-based polymer (A) having a melting point of 200° C. or higher and containing from 23 to 33% by weight of electrically conductive carbon black, and a protective layer formed of a polyester-based polymer (B) having a melting point of 210° C. or higher, wherein the difference between the SP value of the (A) and the SP value of the (B) is adjusted to not greater than a predetermined value and the fiber strength and the elongation at break are adjusted within certain ranges. This can make it possible to obtain an electrically conductive composite fiber that has a superior antistatic performance, which is not degraded very much over a practical wearing for a long term, though it contains only a relatively small amount of electrically conductive carbon black, and that is suitable for the field of clothing such as clean room wears and working wears.
摘要:
A method of controlling the criticality of a nuclear fuel cycle facility includes steps of producing a reactor fuel by adding less than 0.1% by weight of gadolinia to a uranium dioxide powder with a uranium enrichment of greater than 5% by weight and controlling the effective neutron multiplication factor of a uranium dioxide system in a step of handling the reactor fuel to be less than or equal to the maximum of the effective neutron multiplication factor of a uranium dioxide system with a uranium enrichment of 5% by weight.
摘要:
A first intensity Az expressed as Az=az×Eα, a first reference intensity Ao expressed as Ao=ao×Eα, a second intensity Bz expressed as Bz=bz×E, and a second reference intensity Bo=bo×E, are evaluated. The first intensity and the first reference intensity are of radioactive nuclides generated by a neutron capture reaction of a heavy nuclide or a fission product nuclide. The second intensity and the second reference intensity are of radioactive fission product nuclides except nuclides generated by a neutron capture reaction. The reference intensities are measured where the void fraction is known. Also a correlation curve of (az/ao) and a void fraction is evaluated. Finally an axial void fraction distribution is evaluated based on the value of (az/ao) and the correlation curve.
摘要翻译:表示为第一参考强度A 的第一强度A z sub> > o SUB>表示为第二强度B SUB表达的第二强度B SUP> 作为Bζz z x x x x x are are are are are,,,,evaluated evaluated evaluated evaluated evaluated evaluated evaluated evaluated evaluated evaluated evaluated evaluated evaluated evaluated evaluated evaluated evaluated evaluated evaluated evaluated evaluated evaluated evaluated evaluated evaluated evaluated evaluated evaluated evaluated evaluated evaluated evaluated evaluated 。 第一强度和第一参考强度是由重核素或裂变产物核素的中子捕获反应产生的放射性核素。 第二强度和第二参考强度是放射性裂变产物核素,除了由中子俘获反应产生的核素外。 在已知空隙率的情况下测量参考强度。 此外,还评估了(a z> / / o o o o)和空隙率的相关曲线。 最后,基于(a 1 / z 2 / a 2)的值和相关曲线来评估轴向空隙率分布。