55results about How to "·Excellent thermal stability" patented technology

An electroluminescent (EL) is provided comprising an anode, an organic electroluminescent element, and a cathode wherein the electroluminescent element contains, for example, a fluorescent 1,1′-binaphthyl derivative component of Formula (I) wherein R1, R2, R3 and R4 are individual substituents or a group of substituents, each of which may be selected from the group consisting of hydrogen, or alkyl of from 1 to about 25 carbon atoms; an alicyclic alkyl of from 3 to 15 carbon atoms; an aryl or substituted aryl with about 6 to about 30 carbon atoms; carbon atoms from 4 to 24 necessary to complete a fused aromatic ring of naphthalene, anthracene, perylene and the like; an alicyclic alkyl group with from about 3 to about 15 carbon atoms; a silicon atom which can be substituted with a trimethyl, diphenylmethyl, triphenyl group and the like; heteroaryl or substituted heteroaryl of from 5 to 24 carbon atoms, carbon atoms necessary to complete a fused heteroaromatic ring of furyl, thienyl, pyridyl, quinolinyl and other heterocyclic systems; an alkoxy, amino, alkyl amino or aryl amino of from 1 to about 25 carbon atoms; a halogen, a cyano group, and the like.

The present invention is a polycarbonate-polyorganosiloxane copolymer (A-1) comprising a polycarbonate block composed of a specific structural unit and a polyorganosiloxane block composed of a specific structural unit, wherein(1) the content of the polyorganosiloxane block portion is 1 to 30% by mass,(2) the average number of the repeating structural units represented by the general formula (II) is 70 to 1000,(3) the viscosity-average molecular weight of the copolymer is 13000 to 26000, and(4) the content of the phenol residue having an allyl group in the copolymer is 400 ppm by mass or less, the copolymer providing a molded article having excellent thermal stability and excellent color tone after even when the molding is carried out at high temperature; a process for production of the copolymer; and a polycarbonate resin using the polycarbonate-polyorganosiloxane copolymer.

A cyclopentaphenanthrene-based compound is easy to prepare and excellent in solubility, color purity, color stability, and thermal stability. The cyclopentaphenanthrene-based compound is useful as a material for forming an organic layer, in particular, an emitting layer, in an organoelectroluminescent device, and as an organic dye or an electronic material such as a nonlinear optical material.

The invention discloses a 3D-printing thermoplastic polyurethane material and a preparation method of same. The 3D-printing thermoplastic polyurethane material includes, by weight, 35-75 parts of a macro-molecular polyol, 0-10 parts of a fluorine-containing polyol, 2-25 parts of a small-molecular chain extender, 0-7 parts of a fluorine-containing chain extender, 5-60 parts of isocyanate, 0-8 parts of a hydrolysis stabilizing agent, and 0-10 parts of other additives. Compared with a method in the prior art, an in-situ polymerization one-step method is employed in the preparation method. By means of one or more of the fluorine-containing polyol and the fluorine-containing chain extender, fluorine is introduced into the thermoplastic polyurethane material to prepare the 3D-printing thermoplastic polyurethane material which has the advantages of both the fluorine-containing compound and the TPU. The material is excellent in thermal-stability, is low in shrinking rate, is high in mechanical performance and is low in water absorption. A 3D-printing product prepared from the material is excellent in performance.

A propulsion energy storage system for a hybrid vehicle includes ultracapacitor based energy storage to provide rechargeable energy storage. The rechargeable energy storage used performs well over a wide thermal range and thus permits vehicle designers and manufacturers to forego incorporation of temperature management systems. Further, as the rechargeable energy storage exhibit excellent thermal stability, the form factor of the cells of the rechargeable energy storage (e.g., ultracapacitors) may be adjusted to meet the desires of designers, manufacturers and users.

The present invention relates to a method of preparing a cathode active material precursor for a lithium rechargeable battery, the cathode active material precursor for the lithium rechargeable battery prepared thereby, and a cathode active material formed using the cathode active material precursor.According to the present invention, the method of preparing a cathode active material precursor for a lithium secondary battery controls the concentration of a concentration gradient part and a shell part in a precursor to obtain a desired concentration of a transition metal in the shell part. As a result, a metal composition is distributed in a continuous concentration gradient from the interface between the core part and the shell part to the surface of the cathode active material, thereby a cathode active material with excellent thermal stability.

The invention discloses a low cost environmental protection ultra-tough rigid polyvinyl chloride nano compound capable of injection molding and a preparation method. The raw material of the compound comprises the components by weight parts: 100 parts of polyvinyl chloride, 10 to 100 parts of nano calcium carbonate, 4 to 100 parts of acrylonitrile-butadiene-styrene terpolymer, 1 to 3 parts of lanthanum tin compound stabilizer, 1 to 3 parts of acrylate processing aid, 1 to 3 parts of inner lubricant and 0.3 to 1 part of outer lubricant. The low cost environmental protection ultra-tough rigid polyvinyl chloride nano compound capable of injection molding is obtained after mixing and cooling the raw materials in a high-speed mixer and granulating in a conical twin-screw extruder. In the invention, the advantages of good flame retardance, strong rigidity and low price of polyvinyl chloride resin, strong rigidity, toughening property for polyvinyl chloride and low price of the nano calcium carbonate, impact resistance, low temperature resistance, easy molding and processing and the like of ABS (Acrylonitrile Butadiene Styrene) are integrated; the product has low price, environmental protection performance, ultra-high toughness, good comprehensive mechanical property and good processing fluidity, and has wide application prospect and obvious social benefit in the fields of household appliance elements, automobile instruments and the like.

The invention relates to a star silsesquioxane-grafted acrylic ester-sulfonated styrene segmented copolymer and a preparation method thereof. The star silsesquioxane-grafted acrylic ester-sulfonated styrene segmented copolymer is a star hybrid macromolecule which adopts the silsesquioxane as a core and grafted acrylic ester segmented styrene as an arm. The synthesis method of the star silsesquioxane-grafted acrylic ester-sulfonated styrene segmented copolymer comprises the following steps of: synthesizing star silsesquioxane-grafted acrylic ester-styrene segmented copolymer by adopting silsesquioxane containing active chlorine as an initiator, selecting several types of acrylic ester, styrene and the like as comonomer and adopting cuprous chloride / pentamethyl divinyl triamine as a catalytic system through a two-step atom transfer free radical polymerization method; obtaining star silsesquioxane-grafted acrylic ester-sulfonated styrene segmented copolymer through vitriolization; and obtaining star silsesquioxane-grafted acrylic ester-sulfonated styrene segmented copolymer macromolecules of different structures by controlling the length of each POSS (Polyhedral Oligomeric Silsesquioxane) star arm, i.e., the constitution and the length of each block, so that the performances of the star silsesquioxane-grafted acrylic ester-sulfonated styrene segmented copolymer and the proton exchange membrane thereof are adjusted.

The invention belongs to the technical fields of functional polymer materials and electrochemistry and in particular relates to a preparation method of a pore-filing type proton exchange membrane taking double ether crosslinked porous polybenzimidazole imide as a base. The preparation method of the pore-filing type proton exchange membrane taking the double ether crosslinked porous polybenzimidazole imide as the base comprises the following steps: firstly synthesizing polybenzimidazole imide provided with a cross-linkable imidazole group on a main chain, preparing the synthesized polybenzimidazole imide into a membrane solution, adding a double ether crosslinking agent, reacting with the imidazole group, a crosslinking sulfonated polyimide polymer in a membrane forming process, adding a pore-forming agent at the same time to form a crosslinked porous polybenzimidazole imide membrane, and finally compounding the crosslinked porous polybenzimidazole imide membrane with perfluorosulfonate resin, so that the pore-filling type proton exchange membrane is obtained. A basement membrane gives good mechanical properties to the pore-filling type membrane, and the pore-filling type membrane has high dimensional stability; meanwhile, the proton conductivity of a perfluorosulfonate membrane is not greatly reduced. The preparation method of the pore-filing type proton exchange membrane taking the double ether crosslinked porous polybenzimidazole imide as the base has the advantages that the preparation technology controllability is good; and compared with the traditional perfluorosulfonate membrane, the obtained pore-filling type proton exchange membrane has high mechanical strength and good dimensional stability and has broad application prospect in a polymer electrolyte membrane fuel cell.

The invention relates to a transparent cubic boron nitride-diamond polycrystal preparation method. Hexagonal boron nitride-diamond mixed powder or cubic boron nitride-diamond mixed powder is used as a raw material and has a diamond mass fraction of 30-90%. After purification and removal of impurities, a binder is not used, a sintering unit is assembled and the transparent cubic boron nitride-diamond polycrystal is prepared directly through high temperature superhigh pressure sintering. The transparent cubic boron nitride-diamond polycrystal has uniform phase distribution. Cubic boron nitride grains have submicron-level sizes and diamond crystal grains are uniformly distributed in the cubic boron nitride grains. A large-area compact high-strength transparent cubic boron nitride-diamond interface is formed. The transparent cubic boron nitride-diamond polycrystal with high performances has hardness the same to that of diamond monocrystalline and has heat stability, hardness and wear resistance obviously better than those of a metal binder-containing diamond polycrystal.

The invention relates to a tadpole-shaped sulfonated POSS-containing hybrid polymer synthesized proton exchange membrane and a preparation method therefor. By taking mono-functional group-containing <gamma>-chloropropyl polyhedron silsesquioxane (single chloropropyl silsesquioxane) as an initiator, a catalyst, a ligand and an active monomer at a specific proportion are added to a reactor to be synthesized by adopting a two-step atom transfer free group polymerization method; and next, the tadpole-shaped sulfonated POSS-containing hybrid polymer is obtained by adopting a sulfonating mode. According to the designed membrane-forming method, the tadpole-shaped sulfonated POSS-containing hybrid polymer is taken as the raw material, and N, N-dimethylformamide is taken as a solvent to obtain themembrane in a pouring manner. The single-arm-structured and tadpole-shaped organic and inorganic hybrid polymer has high hydrophilia while excellent thermal stability is also ensured by virtue of existence of the POSS core, thereby improving the proton electric conductivity of the proton exchange membrane at a high temperature.

The present invention relates to a cobalt (Co) and platinum (Pt)-based multilayer thin film having a novel structure and perpendicular magnetic anisotropy, and to a fabrication method thereof. More specifically, the invention relates to a cobalt and platinum-based multilayer thin film having perpendicular magnetic anisotropy (PMA), which includes thin cobalt layers and thin platinum layers alternately deposited over a substrate, and has an inverted structure in which a thickness of the thin cobalt layers is greater than that of the thin platinum layers, and to a fabrication method thereof. The cobalt and platinum-based multilayer thin film has a new structure in which the thickness of a magnetic thin layer is greater than that of a non-magnetic thin layer. The multilayer thin film may be easily applied as a free layer and a pinned layer in a magnetic tunnel junction by controlling the perpendicular magnetic anisotropy energy depending on the thickness ratio of the layers. Also, the multilayer thin film has excellent thermal stability, and thus maintains its PMA energy density even after being subjected to a heat treatment process. In addition, it enables a fine amount of in-plane magnetic anisotropy to be formed by heat treatment so as to reduce the critical current density required for magnetization switching. Therefore, it may be advantageously used for high-performance and high-density MRAM.

The invention discloses a thermophilic esterase and an application thereof in degradation of PAEs (Phthalic Acid Esters). The amino acid sequence of the thermophilic esterase is shown in SEQ ID NO.1. A hydrolysis reaction of PAEs is carried out in a water-containing medium under the catalysis of the thermophilic esterase and the fusion protein of the thermophilic esterase so as to generate a phthalic monomer acid and an alcohol are generated, and a phthalic acid and the alcohol are further formed. The thermophilic esterase can be used for preliminarily degrading a plasticizer, has a certain resistance to a denaturant and an organic solvent with moderate and low concentrations, has excellent heat stability and has the function of degrading various PAEs. The thermophilic esterase is the only one esterase cloned from thermophilic microorganisms according to literature reports. The thermophilic esterase has a good application prospect in the purely enzymatic degradation of the PAEs on the basis of the excellent performance. The thermophilic esterase realizes harmless degradation of the PAEs, and is good in degradation reaction stability, extensive in reaction condition and high in reaction speed.

The object of the present invention is to provide an organic-inorganic hybrid material having heat resistance, and said object of the present invention can be attained by providing an organic-inorganic hybrid prepolymer containing a phenyl group which is prepared by the polycondensation reaction accompanying dehydration between a polydimethylsiloxane and a metal and / or semimetal alkoxide, wherein (a) phenyl group(s) is (are) partially or wholly introduced into said polydimethylsiloxane and / or said metal and / or semimetal alkoxide.

Provided are a Light Emitting Diode (LED) red fluorescent material and a lighting device having the same. The florescent material consists of elements M, A, D, X, L and Z, wherein element M at least contains one or more than one element of Be, Mg, Ca, Sr, Ba and Zn; element A at least contains one or more than one element of B, Al, Ga, In, La, Gd, Lu, Sc and Y; element D at least contains one or more than one element of Si, Ge, C, Sn, Ti, Zr and Hf; element X at least contains one or more than one element of N, O and F; element L at least contains one or more than one element of S, Se and Te; and element Z at least contains one or more than one element of a rare earth element or a transition-metal element.

The present invention provides a resin composition for molding that allows production of a molded body having excellent thermal stability as well as high flexibility and strength, without using heavy metals such as lead and tin, and also provides a molded body obtained using the resin composition for molding. The present invention provides a resin composition for molding, including a chlorinated polyvinyl chloride and a thermal stabilizer, the chlorinated polyvinyl chloride having structural units (a) to (c) represented by formulae (a) to (c) shown below:—CCl2—  (a),—CHCl—  (b),—CH2—  (c),the proportion of the structural unit (a) being 17.5 mol % or less, the proportion of the structural unit (b) being 46.0 mol % or more, and the proportion of the structural unit (c) being 37.0 mol % or less, relative to the total number of moles of the structural units (a), (b), and (c), the chlorinated polyvinyl chloride having a chlorine content of 63 mass % or more and less than 72 mass %, the thermal stabilizer containing a calcium alkyl carboxylate and a zinc compound, and the resin composition for molding having a loss in quantity on heating at 230° C. of less than 2 mass %.