85results about How to "Achieve high performance" patented technology

The invention belongs to the technical field of polymer material synthesis and preparation, relating to a star-shaped comb butadiene/styrene segmented copolymer, which is characterized in that the copolymer has the following structure: An-C, wherein A is the butadiene/styrene segmented copolymer, C is star-shaped seed tree coupler residue which is an epoxidation liquid star-shaped copolymer, n is branching degree which is larger or equal to 3, the number average molecular weight of the star-shaped comb segmented copolymer An-C is 5*10<4>-50*10<4>, the number average molecular weight of the segmented copolymer A is 1*10<4>-15*10<4>, the content of styrene is 55 percent to 85 percent (weight percent, same below), the content of butadiene is 15 percent to 45 percent, the content of 1, 2-structure is less than 30 percent (weight percent, which is counted by 100 percent of the total amount of monomer butadiene). The synthesis has the effect and benefit of simplifying the synthetic route of the star-shaped comb butadiene/styrene segmented copolymer, which can be widely applied to the preparation of the star-shaped comb butadiene/styrene segmented copolymer.

The application provides a camera lens, a camera module, and a terminal. The camera lens includes a first lens, a diffractive optical element, and a lens module along an optical axis from the object surface to the image surface; the surface of the first lens facing the object surface is a convex surface at the optical axis, and the surface facing the image surface is a concave surface, having a positive focal power; the diffractive optical element has a positive focal power and includes a surface facing the object surface, a surface facing the image surface, and a diffractive surface between the two surfaces, the surface facing the object surface is a convex surface at the optical axis, and the surface facing the image surface is a concave surface at the optical axis; the lens module includes N lenses, at least one of the surface facing the object surface and the surface facing the image surface of each of the N lenses is an aspheric surface, and the lens module has a positive focal power. The camera lens provided by the application can meet the requirements of miniaturization and high image quality, and meet the demand for size increase of the image sensor.

The invention discloses a starlike high impact polystyrene and a preparation method thereof. The polymer is an in-situ composition of a starlike butadiene/styrene block copolymer with the structure shown in (SBC-PS)n-C and a starlike styrene homopolymer with the structure shown in (PS)n-C, wherein SBC is a butadiene/styrol copolymer block, PS is styrene homopolymer block, C is polyfunctional alkyllithium initiator residue, and n is the functionality of the polyfunctional alkyllithium initiator, which is larger than 3; the starlike high impact polystyrene comprises the following components by weight percent: 70-95% of styrene, 5-30% of butadiene, 10-60% of (SBC-PS)n-C, and 90-40% of (PS)n-C. The starlike high impact polystyrene prepared by the invention has excellent impact resistance, and the star structure also endows excellent processability to the materials.

The invention relates to a continuous carbon fiber-reinforced PA6 composite with high strength, high modulus, electrical conductivity and thermal conductivity, and a preparation method thereof. The composite comprises, by weight, (1) 100 parts of PA6 resin, (2) 0.2 to 1 part of an anti-oxidant, (3) 0.2 to 1.2 parts of a flow promoter, (4) 2 to 10 parts of a flexibilizer and (5) 1 to 5 parts of a compatilizer. The preparation method comprises the following steps: premixing the above components according to a certain ratio, carrying out melting and mixing via a double/single-screw set and then extruding the obtained mixture into a die head for flow splitting and impregnation so as to prepare the continuous carbon fiber-reinforced PA6 composite with high strength, high modulus, electrical conductivity and thermal conductivity. Compared with conventional staple carbon fiber-reinforced PA6 composites, the continuous carbon fiber-reinforced PA6 composite prepared by using a special impregnation process in the invention has greatly improved mechanical properties since the length retention rate of carbon fibers in a PA6 carrier is high or continuous and has substantially improved electrical conductivity and thermal conductivity due to a continuous network structure, so the application range of the composite is greatly broadened.

The invention discloses a strengthening and toughening polypropylene composite, which comprises, by weight, 35 to 94 parts of polypropylene, 0.5 to 5 parts of polyfunctional monomer, 5 to 60 parts of inorganic filler and 0.2 to 4 parts of polypropylene universal antioxidant and processing agent. A preparation method of the strengthening and toughening polypropylene composite includes: mixing all components evenly, adding the components in a screw extruder to perform melt mixing reaction, extruding and prilling to obtain the strengthening and toughening polypropylene composite. In-situ graft reaction occurs in a melt mixing process through double bond of the polyfunctional monomer and polypropylene, simultaneously C=O bond of the polyfunctional monomer and hydroxy on the surface of the filler form hydrogen bond, interfacial interaction between the filler and a matrix is enhanced, thereby achieving high performance of the polypropylene composite. The obtained polypropylene composite not only has good toughness and rigidity, but also can restrain degradation of the polypropylene.

The invention relates to a preparation method of a polyethylene composite material with ultrahigh molecular weight. The method is characterized by comprising the steps of: selecting two olefin polymerization catalysts, wherein one is an ultra-high molecular weight polyethylene catalyst capable of producing ultrahigh molecular weight polyethylene, and the other is a low molecular weight catalyst capable of producing low molecular weight polyethylene; using POSS molecules with hydroxyl and acrylate isobutyl on the surfaces as carriers, loading the low molecular weight catalyst on the POSS molecules, and conducting a polymerization reaction to obtain low molecular weight polyethylene; and then loading the ultrahigh molecular weight polyethylene catalyst on the POSS molecules, adding a cocatalyst, introducing ethylene, and conducting a polymerization reaction to obtain an ultrahigh molecular weight / POSS / low molecular polyethylene blended nano composite material. The preparation method provided by the invention has advantages of simple process, high efficiency and low energy consumption, and can prepare UHMWPE / low molecular weight polyethylene / POSS nano composite material with uniformly mixed molecular scale by in situ polymerization.

The invention relates to a continuous carbon fiber reinforced polypropylene high-performance electricity-conductive and heat-conductive composite material and a preparation thereof. The continuous carbon fiber reinforced polypropylene high-performance electricity-conductive and heat-conductive composite material comprises the components in parts by weight: (1) 100 parts of polypropylene, (2) 0.1-1 parts of an antioxidant, (3) 0.2-2 parts of a flow promoter, and (5) 1-5 parts of a compatilizer; after being premixed according to a certain proportion, the components are melted, mixed and extruded into a hanger-shaped mold head by a double/single-screw machine unit to be shunted; finally, the components enter an S-shaped mold head to sufficiently soak carbon fibers so as to prepare the continuous carbon fiber reinforced polypropylene high-performance electricity-conductive and heat-conductive composite material. Compared with the traditional carbon fiber reinforced PP composite material, the continuous carbon fiber reinforced polypropylene high-performance electricity-conductive and heat-conductive composite material provided by the invention has the advantages that the mechanical property of the continuous carbon fiber reinforced composite material prepared by using a special soaking process is greatly improved because the length retention rate of carbon fibers in a PP carrier is very high or the carbon fibers are continuous in the PP carrier; on the basis of a continuous network structure, the electricity-conductive and heat-conductive performances of the continuous carbon fiber reinforced composite material are also greatly improved.

First lens-group is composed of a negative lens and a positive lens. When magnification is changed from wide end to tele end, a distance between first lens-group and second lens-group increases, and a distance between second lens-group and third lens-group decreases. Specifically, first lens-group moves toward the object side, second lens-group moves along a path convex toward the image side, third lens-group monotonously moves only toward the object side, and fourth lens-group moves along a path convex toward the object side. Further, the following formulas are satisfied:

0.3<X1/ft<0.5   (1); and

5.0<f1/fw<7.0   (2),

where X1: the amount of movement of first lens-group when magnification is changed from wide end to tele end, ft: the focal length of the entire system at tele end, f1: a combined focal length of first lens-group, and fw: the focal length of the entire system at wide end.

A semiconductor device is disclosed, which comprise a first semiconductor chip where a semiconductor element is formed, a first connecting terminal arranged on a semiconductor element formation surface side in the first semiconductor chip and connected electrically to the semiconductor element, a conductive member buried in a through hole that goes through the first semiconductor chip, a second connecting terminal arranged on a back surface side of the semiconductor element formation surface in the first semiconductor chip, and connected electrically to the semiconductor element via the conductive member, a wiring substrate to which the first semiconductor chip is mounted, and a third connecting terminal at least portion of which is formed at a position corresponding to one of the first connecting terminal and the second connecting terminal, and which is electrically connected to the one of the first connecting terminal and the second connecting terminal.

The invention relates to a high-weatherability high-flow glass fiber dipping polyolefin formula and a preparation method thereof. The high-weatherability high-flow glass fiber dipping polyolefin formula comprises the following components by mass part: 1) 100 parts of polyolefin; 2) 0.5-2 parts of an anti-ultraviolet aging auxiliary agent; 3) 0.5-2 parts of an anti-oxidant; 4) 0.2-2 parts of a flow promoter; 5) 2-10 parts of a flexibilizer; and 6) 1-5 parts of a compatilizer. The components are pre-mixed according to certain proportion, the components are fusion through a double/single screw extruder, then mixed and extruded to a die head for shunting and dipping, and the high-weatherability high-flow glass fiber dipping polyolefin can be prepared. The high-weatherability high-flow glass fiber dipping polyolefin has the advantages that a hyper branched tail end active function group and glass fiber are combined, interface combination capability between polyene resin and glass fiber are enhanced, and the mechanical properties are increased.

Provided is a semiconductor device which includes a flexible circuit board whereupon a first external electrode is arranged on a first surface and second and third external electrodes are arranged on a second surface; a plurality of memory devices and passive components; a supporting body having a groove on one surface; and an arithmetic processor device. The memory devices and the passive components are connected to the first external electrode, the one surface of the supporting body is bonded on the first surface of the flexible circuit board so that a groove stores the memory devices and the passive components. The flexible circuit board is bent along the periphery of the supporting body, and wraps the side surfaces and the other surface of the supporting body. On the flexible circuit board, the second external electrode is arranged on the second surface which faces the first external electrode, and the third external electrode is arranged on the second surface which is bent to the other surface of the supporting body. The arithmetic processor device is connected to the second external electrode, and a bump is formed on the third external electrode.

The invention belongs to the field of comprehensive utilization of solid wastes, and particularly relates to liquefied consolidated soil and a preparation method thereof. According to the liquefied consolidated soil, soil is used as a main raw material, a cementing material, a dispersing agent, an additive and water in a certain proportion are added, a vibration stirring technology is adopted, aggregate is made to be uniform in macro and micro, a large-flow-state and pumpable liquefied consolidated material is formed, the strength, density and expansion degree are adjustable, and the liquefied consolidated soil is suitable for backfilling of fertilizer grooves, pipe culverts, cavities and abutment backs and reinforcing of building foundations, road subgrade filling, and riverway, lake and coastline embankment reinforcement, seepage prevention and the like. The problems of narrow space, non-uniform compaction of special-shaped end faces, improper non-excavation cavity backfilling and non-uniform mixing of the flow-state solidified soil by using the traditional mixing equipment are solved, and the liquefied consolidated soil has the advantages of no vibration, self compaction, high strength, anti-permeability, seismic resistance, stable volume and environmental protection.

The invention belongs to the technical field of processing and preparation of a macromolecular material and particularly relates to a polylactic acid composition and a preparation method thereof. Thepolylactic acid composition comprises the following components in parts by weight: 100 parts of polylactic acid, 1 to 15 parts of reduced nanometer carbon oxide material/organic salt microsphere composite powder and 0.02 to 0.30 part of a hydrolysis-resistant agent. The reduced nanometer carbon oxide material/organic salt microsphere composite powder has high compatibility with the polylactic acid, so that the reduced nanometer carbon oxide material is dispersed in the polylactic acid well, the mechanical property of the polylactic acid is improved, and the crystallization property, the processing property, the biodegradability, the heat stability and the like are effectively improved; meanwhile, high electricity-conducing and heat-conducting properties are achieved and the application range of the polylactic acid is enlarged. In the polylactic acid composition prepared by the method, the preparation process is simple and the operation process is easy to implement.

The invention discloses a polycarboxylate high-efficiency water reducer and a preparation method thereof. The preparation method comprises the following steps of at normal temperature, dropwise adding components B, C into a component A, cooling to room temperature after dropwise adding the components, and adjusting the pH value to obtain the polycarboxylate high-efficiency water reducer, wherein the component A is obtained by mixing and stirring polyoxyethylene ether, polyethylene glycol and water and then adding a tin or acid catalyst and hydrogen peroxide; the component B is obtained by mixing acrylic acid, a reducing agent and water; and the component C is obtained by mixing sodium methallyl sulfonate, an initiator and water. The water reducer disclosed by the invention is of a multi-arm branch structure with sufficient arm lengths, so that a steric-hinerance effect can be sufficiently developed, the water reduction performance is high, and the working performance of concrete is improved; and the method disclosed by the invention is mild in reaction condition, simple in technology, few in side reactions, safe, environmentally-friendly, low in energy consumption and low in production cost.

The invention discloses a highly-branched-chain polyaniline modified carbon nanotube/thermosetting resin composite material and a preparation method thereof. The preparation method comprises the following steps of: dissolving polyaniline in dimethyl sulfoxide, and dropwise adding trialkoxysilane containing epoxide group and hydrochloric acid in dimethyl sulfoxide to obtain organosilicone modified polyaniline; dissolving obtained organosilicone modified polyaniline in dimethyl sulfoxide, and then adding deionized water and hydrochloric acid into dimethyl sulfoxide to obtain highly-branched-chain polyaniline; adding highly-branched-chain polyaniline and carbon nanotubes into the carbon nanotube, and performing suction filter and washing on highly-branched-chain polyaniline and the carbon nanotubes which are settled in methyl alcohol, thus obtaining highly-branched-chain polyaniline modified carbon nanotubes which are mixed with thermocuring resin at a molten state; and curing the carbon nanotubes and the resin to obtain the highly-branched-chain polyaniline modified carbon nanotube/thermosetting resin composite material which has the characteristics of high dielectric constant and low dielectric loss. A conducting layer of the highly-branched-chain polyaniline wraps the surfaces of the carbon nanotubes, and the decentralized control on the carbon nanotubes and the control on dielectric properties of the composite material can be realized by adjusting the content of the surface wrapping layer. The preparation method is easy to implement and suitable for large-scale application.

Conventionally, in order to remove in-phase external noise, such as power supply noise and the like, related to a crystal oscillator, one oscillation output is obtained from one oscillator, and then two oscillation outputs, the phases of which are different from each other by 180 degrees, are obtained from that one oscillation output by use of a differential amplifier. However, it was impossible to remove in-phase noise occurring in the oscillator. According to the present invention, a piezoelectric oscillator comprises a piezoelectric vibrator, and first and second oscillator circuits. An input terminal of the first oscillator circuit is connected to one terminal of the piezoelectric vibrator, while an input terminal of the second oscillator circuit is connected to the other terminal of the piezoelectric vibrator. It is arranged that the first and second oscillator circuits provide oscillation outputs whose phases are different from each other by 180 degrees.