38results about How to "Improve poor compatibility" patented technology

The invention relates to a modified polyphenylene ether resin, a thermosetting resin composition and application thereof. The modified polyphenylene ether resin has a resin structure obtained by reacting a low-molecular-weight dihydroxy-terminated polyphenylene ether represented by formula (1-1) with a diacyl halide or dicarboxylic acid containing a structural unit represented by formula (1-2), amonofunctional aromatic phenol or a monofunctional aromatic acyl halide or a monofunctional aromatic carboxylic acid. The thermosetting resin composition contains, as essential components, an epoxy resin and the modified polyphenylene ether resin. The invention also provides application of the thermosetting resin composition in prepregs, circuit boards and laminated films. The prepreg, the circuitsubstrate and the laminated film prepared from the thermosetting resin composition provided by the invention have the advantages of low dielectric constant, low tangent of dielectric loss angle highglass transition temperature, excellent heat resistance, excellent wet heat resistance, low hygroscopicity and good binding force with metal.

The invention discloses an ABS (Acrylonitrile Butadiene Styrene) / POM (Polyoxymethylene) alloy and a preparation method thereof. The ABS / POM alloy comprises the following components by weight percent: 65-80 percent of POM, 0.1-0.5 percent of long-chain carboxylic acid calcium salt, 8-20 percent of ABS, 0.1-1 percent of melamine urate, 4-9 percent of compatilizer, 5-16 percent of flexibilizer, 0.1-1 percent of antioxygen and 0.1-5 percent of lubricant, wherein the compatilizer is compounded by ABS grafted maleic anhydride and SEBS grafted maleic anhydride; and the flexibilizer is thermoplastic polyurethane elastomer. The compatibility of POM and ABS is improved through compounding the ABS grafted maleic anhydride and the SEBS grafted maleic anhydride, and the impact property of the alloy is further improved by adopting the polyurethane elastomer as the flexibilizer.

The invention relates to modified polyphenyl ether resin and application thereof. The modified polyphenyl ether resin has a long carbon chain structure which contains at least one group of hydrocarbon group with carbon element greater than or equal to 3. The modified polyphenyl ether resin adopts the structure comprising at least one group of hydrocarbon group with carbon element greater than or equal to 3, so the compatibility between the polyphenyl ether and other resin can be enhanced, the split-phase 'island' phenomenon of a resin system is remarkably improved, the dielectric constant and the loss of a laminated plate can be reduced, the viscosity of the resin system on a metal foil can be improved, and the heat resistance of the plate is maintained.

The invention belongs to the technical field of polymer auxiliaries and particularly relates to an amphiphilic pectinate composite type polymer light stabilizer and a preparation method thereof. A molecular side chain of the composite type polymer light stabilizer contains diphenyl ketone type ultraviolet light absorber functional groups, hindered amine type free radical catcher groups, a lipophilic group acrylate, a hydrophilic group methoxy polyethylene glycol molecular chain, and the like at the same time. With two functional monomers, namely an ultraviolet light absorber and a free radical catcher, the light stabilizer disclosed by the invention has dual light-stability effects and a high thermal decomposition temperature, is amphiphilic and especially suitable for light stabilization of a wood-plastic composite material. The light stabilizer is synthesized by adopting free radical solution polymerization, simple in preparation method and suitable for industrial production.

The invention discloses an epoxy nanocomposite based on polyhedral oligomeric silsesquioxanes (POSS) and a preparation method of the epoxy nanocomposite based on the POSS and relates to the epoxy nanocomposite with a controllable phase structure capable of improving effect and based on the POSS. The preparation method includes the following steps of allocating a POSS monomer, a chain transfer agent and an initiating agent in a solution according to the measuring amount through a reversible addition-fragmentation chain transfer (RAFT) method, conducting freeze thaw and degassing through liquid nitrogen, charging argon shield to enable the mixture to react, and obtaining PMAiBuPOSS; further allocating PMAiBuPOSS, Methl Methacrylate monomer (MMA) and an initiating agent in a solution, and obtaining POSS base block copolymer , namely, PMAiBuPOSS-b-PMMA, through the RAFT; conducting melt blending on the POSS monomer, epoxy resin, the prepared POSS base block copolymer to obtain blend precursor of the POSS and the epoxy, adding in a curing agent, fully stirring, dissolving the mixture the curing agent, pouring the blend into a die, conducting temperature programming and curing, and obtaining the nanocomposite with the controllable phase structure and based on the POSS.

The invention provides halogen-free environmentally-friendly flame-retardant ABS / PC resin alloy, which is characterized by comprising the following materials by mass: 40-70 parts of ABS resin, 20-30 parts of PC resin, 5-10 parts of modified montmorillonite, 10-15 parts of a composite flame retardant, 0-5 parts of a synergistic effect flame retardant, 1-3 parts of an antioxidant, 3-6 parts of a lubricant and 0-5 parts of an inorganic filler. The halogen-free environmentally-friendly flame-retardant ABS / PC resin alloy keeps properties of the ABS resin and the PC resin, and the resin alloy has excellent mechanical and flame retardant properties.

The invention discloses a method for preparing antibacterial polyamide fiber through in-situ polymerization, and belongs to the technical field of modified polyamide materials. Zr(HPO4)2 is adopted to load polyfurfuryl alcohol to wrap antibacterial nano metal powder microspheres, polyvinylpyrrolidone (PVP) and metal powder are subjected to high-speed ball milling to prepare nano metal powder with good dispersity, and then the nano metal powder and furfuryl alcohol are subjected to a polymerization reaction to prepare polyfurfuryl alcohol wrapped antibacterial nano metal powder microspheres, so that the agglomeration of the nano metal powder is avoided; hydrogen bonds between hydroxyl of organic polyfurfuryl alcohol and P-OH of Zr(HPO4)2 interact to realize loading of the antibacterial nano metal powder, wherein the metal powder is copper powder, zinc powder, nickel powder, copper-zinc alloy powder or copper-iron alloy powder; and the polyfurfuryl alcohol can have good compatibility with polyamide, and a prepared antibacterial polyamide fiber material has good antibacterial property, thermal stability and fiber strength.

The invention provides a graphene composite coating. The graphene composite coating comprises the following components in parts by weight: 15-35 parts of modified graphene, 30-45 parts of acrylic ester emulsion, 2-4 parts of an ammonium polycarboxylate salt dispersing agent, 0.5-2 parts of a non-ion type wetting agent, 1-5 parts of calcium bentonite, 12-20 parts of a solvent and 1-3 parts of an addition agent, wherein the modified graphene is palladium doped graphene, the doped mole ratio of palladium atoms in the palladium doped graphene is 0.5-2%, and the acrylic ester emulsion is organic titanium modified acrylic ester emulsion.

The invention discloses a polyvinyl chloride-graphene composite material and a preparation method and application thereof, and belongs to the technical field of nano material production processes. Thepreparation method comprises the following steps: preparing phenyl dicarboxylate modified graphene, mixing the phenyl dicarboxylate modified graphene with polyvinyl chloride resin and a matching aidto obtain a mixture, and carrying out mixing and molding processes on the mixture to obtain the polyvinyl chloride-graphene composite material. According to the polyvinyl chloride-graphene composite material disclosed by the invention, the phenyl dicarboxylate plasticizer and the graphene have an adsorption effect, and the phenyl dicarboxylate modified graphene and the polyvinyl chloride resin have a compatibilization effect so that the compatibility of a graphene phase and a polyvinyl chloride phase in the composite material is improved. Therefore, the invention discloses a preparation methodwhich is low in cost, free of solvent pollution and simple in process, and the polyvinyl chloride-graphene composite material graphene prepared by the preparation method has good compatibility and further has excellent antistatic performance, physical and mechanical properties and other material properties.

The invention discloses a preparation method of large-particle size melamine cyanurate. The preparation method comprises the following steps: (1) uniformly mixing melamine and cyanuric acid, adding water, heating, keeping temperature, and removing moisture; (2) carrying out prepolymerization reaction on caprolactam and a catalyst, then adding a cocatalyst, and uniformly mixing; and (3) adding a prepolymer obtained from the step (2) to a system obtained from the step (1) for polymerization reaction, after the polymerization reaction is finished, cooling, and discharging. MCA prepared through the method disclosed by the invention has large particle size, is coated with nylon 6 on a surface and can be used for improving the problem of poor compatibility of the MCA and a matrix when applied to plastic modification and nylon modification especially. The preparation method disclosed by the invention is green and environment-friendly. The MCA can reduce the phenomenon of dust reduction by being taken as a raw material of downstream plastic processing.

The invention discloses a preparation method of an epoxy resin curing agent. The epoxy resin curing agent is prepared by carrying out a reaction on a biphenyl-type phenol liquid crystal element and abifunctional epoxy compound, and in the preparation process, the liquid crystal element is introduced into the epoxy resin curing agent. When the epoxy resin curing agent provided by the invention isused for curing epoxy resin, heat conductivity of a cured product can be improved, and meanwhile, the problem of poor compatibility of the biphenyl-type phenol liquid crystal element and an epoxy resin matrix is solved. In addition, the preparation method of the epoxy resin curing agent is simple and is easy to operate, and production is convenient. The raw materials used in the preparation process are wide, cost is low, and the preparation method is easy for wide popularization and use.

The invention discloses a flame-retardant quartz plate. The flame-retardant quartz plate is prepared from the following components in percentage by mass: 25 to 30 percent of quartz powder, 40 to 45 percent of a particular raw material, 10 to 15 percent of ceramic powder, 1 to 2 percent of a silane coupling agent, 1 to 2 percent of a curing agent, 0.5 to 1 percent of ammonium ferrous sulfate, 0.5 to 1 percent of tert-butyl hydroquinone, 1 to 3 percent of a flame retardant and 10 to 15 percent of unsaturated polyester resin. According to the flame-retardant quartz plate disclosed by the invention, the ammonium ferrous sulfate and the tert-butyl hydroquinone are added, so that the compatibility between an inorganic flame retardant and unsaturated resin can be improved, all raw materials can be uniformly mixed, the interfacial adhesion property is strong, an internal gap is smaller, and the bonding is closer; the obtained flame-retardant quartz plate has excellent abrasion resistance and also has excellent mechanical performance and higher bending strength, and meanwhile, the flame-retardant quartz plate has good flame retardant effect and lower water absorption.

The invention belongs to the technical field of modified asphalt, and relates to polystyrene modified asphalt and a preparation method thereof. The polystyrene modified asphalt is composed of matrix asphalt and polystyrene-silicon dioxide hybrid materials. The doping quantity of the polystyrene-silicon dioxide hybrid materials is 2-5 wt%, and the molecular weight of polystyrene is 20-100 thousands. Compared with the prior art, the polystyrene modified asphalt has the advantages that the problem that the compatibility between the polystyrene and asphalt is poor is solved, and the polystyrene modified asphalt good in storage stability is obtained through preparation; the technology of the method is relatively simple, the production process is easy to control, the hybrid materials can be smoothly obtained, and industrialized prospects are good; the hybrid materials are in nanometer scale, and the problem that due to high surface energy of common nanometer materials, agglomeration is prone to occurring is solved; in the asphalt modification process, the preparation temperature is low and is only 110-130 DEG C, energy is saved, severe aging of the asphalt is prevented, and it is ensured that the modified asphalt has good performance.

The invention discloses an epoxy nanocomposite based on polyhedral oligomeric silsesquioxanes (POSS) and a preparation method of the epoxy nanocomposite based on the POSS and relates to the epoxy nanocomposite with a controllable phase structure capable of improving effect and based on the POSS. The preparation method includes the following steps of allocating a POSS monomer, a chain transfer agent and an initiating agent in a solution according to the measuring amount through a reversible addition-fragmentation chain transfer (RAFT) method, conducting freeze thaw and degassing through liquid nitrogen, charging argon shield to enable the mixture to react, and obtaining PMAiBuPOSS; further allocating PMAiBuPOSS, Methl Methacrylate monomer (MMA) and an initiating agent in a solution, and obtaining POSS base block copolymer , namely, PMAiBuPOSS-b-PMMA, through the RAFT; conducting melt blending on the POSS monomer, epoxy resin, the prepared POSS base block copolymer to obtain blend precursor of the POSS and the epoxy, adding in a curing agent, fully stirring, dissolving the mixture the curing agent, pouring the blend into a die, conducting temperature programming and curing, and obtaining the nanocomposite with the controllable phase structure and based on the POSS.

The invention discloses an oil-resistant low-temperature-resistant rubber material for vacuum braking hoses, made from, by weight, 100-200 parts of a main material, 40-80 parts of KTC stronWi, 25-75 parts of lightweight calcium carbonate, 10-50 parts of white carbon black, 5-20 parts of Cabot carbon black N550, 5-15 parts of indirect zinc oxide, 2-5 parts of calcium oxide, 6-18 parts of silane coupling agent, 50-70 parts of a plasticizer, 2-6 parts of 2,2,4-trimethyl-1,2-dihydroquinoline polymer, 2-8 parts of N-isopropyl-N'-phenyl-p-phenylenediamine, 1.5-4.5 parts of N-(1,3-dimethyl)butyl-N'-p-phenylenediamine, 0.5-6 parts of microcrystalline wax, and 2-6 parts of a crosslinking agent. The oil-resistant low-temperature-resistant rubber material for vacuum braking hoses has excellent elongation at break, good mechanical properties, excellent ozone resistance and aging resistance, and good oil resistance and low temperature resistance.

The invention provides a highly-insulated high-voltage cable terminal. The highly-insulated high-voltage cable terminal comprises a stress cone and an insulating main body; the stress cone is preparedfrom the materials in parts by weight: 70-120 parts of liquid silicone rubber, 30-50 parts of a modifier, 3-6 parts of a maleamic acid and 2-4 parts of a vulcanizer; the insulating main body is prepared from the materials in parts by weight: 30-50 parts of EPDM, 0.8-1.2 parts of maleic anhydride, 15-25 parts of an ethane-butene copolymer, 20-40 parts of chlorinated polyethylene, 8-15 parts of hydrogenated butadiene-acrylonitrile rubber, 10-25 parts of nano SiO2, 2-5 parts of nano carbon black, 0.45-0.75 part of an initiator, 8-15 parts of a plasticizer, 2-4 parts of a silane coupling agent, 100-200 parts of a filler, 4-8 parts of a lubricating assistant, 6-10 parts of an active assistant, 2-3.5 parts of an anti-aging agent and 4-10 parts of a sulfurizing agent; acidified graphite is addedinto the liquid silicone rubber, graphite is pretreated by activation, the specific surface area and the surface hydroxyl number of the graphite are improved, the dispersity of the graphite in the liquid silicone rubber is improved, the generation of space charge is restrained, and the electrical performance of insulation structure is improved.

The invention discloses a motor with multiple communication addresses, a site selection method, electrical equipment and a communication method.The motor can serve as slave equipment to be in networking communication with external host equipment, the motor comprises a motor body and a motor controller, the motor controller comprises a circuit board, and a microprocessor, an inverter circuit and a network communication module are integrated on the circuit board; the microprocessor of the motor is in networking communication with external host equipment through the network communication module, and is provided with a plurality of different communication addresses at the same time; according to different communication modes of the microprocessor of the motor and the external host equipment, the corresponding communication address is selected to realize networking communication between the motor serving as the slave equipment and the external host equipment, so that the motor can adapt to various different application scenes, the compatibility of the motor is improved, management disorder is avoided, and the service life of the motor is prolonged. Moreover, the management cost can be reduced, the functions of the motor are increased, the motor is suitable for different application scenes of a user side, and the application range of the motor is expanded.

The invention belongs to the technical field of modified asphalt, and in particular relates to a polystyrene hybrid material modified asphalt and a preparation method thereof. The polystyrene hybrid material is a polystyrene silicon dioxide hybrid material, based on the weight of the base asphalt, and its dosage is 1-8wt%. Compared with the prior art, the present invention has the following advantages: the problem of poor compatibility between polystyrene and asphalt is improved; first, the hybrid material is ultrasonically dispersed in a solvent, and then blended with the base asphalt, and the solvent is mixed during the mixing process. Volatilization can ensure the modification effect of polystyrene hybrid materials; during the preparation of modified asphalt, the preparation temperature is low, only 100‑130 ° C, while the conventional preparation temperature of polystyrene modified asphalt is about 180 ° C, Save energy, prevent severe asphalt aging, and ensure that the modified asphalt has good performance; compared with ordinary polystyrene modified asphalt mixture, the prepared asphalt mixture has significantly improved high and low temperature performance.

The invention discloses a preparation method of large-particle size melamine cyanurate. The preparation method comprises the following steps: (1) uniformly mixing melamine and cyanuric acid, adding water, heating, keeping temperature, and removing moisture; (2) carrying out prepolymerization reaction on caprolactam and a catalyst, then adding a cocatalyst, and uniformly mixing; and (3) adding a prepolymer obtained from the step (2) to a system obtained from the step (1) for polymerization reaction, after the polymerization reaction is finished, cooling, and discharging. MCA prepared through the method disclosed by the invention has large particle size, is coated with nylon 6 on a surface and can be used for improving the problem of poor compatibility of the MCA and a matrix when applied to plastic modification and nylon modification especially. The preparation method disclosed by the invention is green and environment-friendly. The MCA can reduce the phenomenon of dust reduction by being taken as a raw material of downstream plastic processing.

The invention discloses a high-performance PBO paper-based material and a preparation method thereof. The method comprises the following steps: dipping PBO raw paper in a PBO precursor solution, drying, and then carrying out hot pressing and heat treatment to obtain the high-performance PBO paper-based material. The PBO and the PBO derivative are used for enhancing the PBO paper for the first time. The similarity of the chemical structure improves the problem of poor compatibility between the traditional resin and the PBO fiber, and the interface interaction is improved; the stress transfer between interfaces is also improved due to similar moduli, so that the PBO paper-based material with excellent performance can be prepared, and the application requirements in the fields of aerospace, national defense and military, electricity, transportation and the like can be met.

The invention discloses an ABS (Acrylonitrile Butadiene Styrene) / POM (Polyoxymethylene) alloy and a preparation method thereof. The ABS / POM alloy comprises the following components by weight percent: 65-80 percent of POM, 0.1-0.5 percent of long-chain carboxylic acid calcium salt, 8-20 percent of ABS, 0.1-1 percent of melamine urate, 4-9 percent of compatilizer, 5-16 percent of flexibilizer, 0.1-1 percent of antioxygen and 0.1-5 percent of lubricant, wherein the compatilizer is compounded by ABS grafted maleic anhydride and SEBS grafted maleic anhydride; and the flexibilizer is thermoplastic polyurethane elastomer. The compatibility of POM and ABS is improved through compounding the ABS grafted maleic anhydride and the SEBS grafted maleic anhydride, and the impact property of the alloy is further improved by adopting the polyurethane elastomer as the flexibilizer.

The invention discloses a sound-insulating and noise-reducing, flame-retardant polypropylene material and a preparation method thereof. It is prepared from components including 20-60 parts by weight of polypropylene, 5-30 parts of modified basalt fiber, preferably 15-20 parts 2-30 parts, 2-30 parts of modified boehmite, preferably 5-10 parts, 0.5-1 part of antioxidant. The polypropylene material obtained by the invention has good sound insulation effect and flame retardant effect, and can be widely used in materials such as home appliances and automobile interior decorations.

The present invention belongs to the technical field of modified asphalt, and in particular relates to polystyrene hybrid material modified asphalt and a preparation method thereof. The polystyrene hybrid material is a polystyrene silica hybrid material, and on the basis of the weight of asphalt as a benchmark, the polystyrene hybrid material dopping content is 1-8wt%. Compared with the prior art, the polystyrene hybrid material modified asphalt has the following advantages: poor polystyrene and asphalt compatibility problem is improved, first the hybrid material is ultrasonically dispersed in a solvent, and subsequently mixed with asphalt, in the mixing process, the solvent is volatilized so as to ensure the modifying effect of the polystyrene hybrid material; in the modified asphalt preparation process, preparation temperature is low, and only is 100-130 DEG C, while the conventional polystyrene modified asphalt preparing temperature is about 180 DEG C, energy is saved, serious asphalt aging is prevented to ensure good performance of the modified asphalt; high and low temperature properties of the prepared asphalt mixture are improved significantly compared with an ordinary polystyrene modified asphalt mixture.

Provided are a method and device for loading a digital certificate in SSL or TLS communication. The method comprises: receiving a handshake request message sent by a client based on a secure sockets layer (SSL) or transport layer security (TLS); according to the handshake request message, verifying a key exchange mode and a first signature mode supported by the client; judging whether the key exchange mode and the first signature mode match a currently loaded digital certificate; if not, loading another digital certificate matching the key exchange mode and the first signature mode; and according to the key exchange mode and the first signature mode successfully matching the digital certificate, returning a handshake response message to the client.The embodiments of the present application achieve dynamic loading of a suitable digital certificate in a handshake negotiation process, thereby ensuring successful completion of SSL / TLS handshake negotiation.

The invention discloses a dispersion system of SBS modified emulsified asphalt, a coating and a preparation method. According to the dispersion system, the coating and the preparation method of the SBS modified emulsified asphalt, the o-tolyl glycidyl ether and the nano-zinc oxide are compounded and added into the raw materials, the o-tolyl glycidyl ether can reduce the viscosity so as to improve the defects of high viscosity and difficult emulsification when the SBS is high in mixing amount, and the molecular chain of the o-tolyl glycidyl ether contains an epoxy group, so that the SBS modified emulsified asphalt has a good dispersion property. The SBS can react with carboxyl in asphalt to generate a covalent bond, namely the poor compatibility of SBS and asphalt molecules is improved by utilizing chemical group bonding with asphalt. Nano-zinc oxide has the characteristics of large specific surface area, large surface free energy and good dispersion effect, forms non-bonding interaction with asphalt to form a more stable structure, and can disperse SBS in the asphalt more uniformly, so that the storage stability of the SBS modified emulsified asphalt is effectively improved.

The invention provides a C-reactive protein kit suitable for various POCT (point-of-care testing) instruments. The C-reactive protein kit comprises a reagent R1, a reagent R2 and a C-reactive proteincalibrator, wherein the reagent R1 comprises a buffer solution, an electrolyte, a protective agent, a thickener and a preservative; the reagent R2 comprises C-reactive protein polyclonal antibody latex particles, a buffer solution, a protective agent, an electrolyte, a precipitator and a preservative; the C-reactive protein calibrator comprises a C-reactive protein antigen, a buffer solution and aprotective agent. The C-reactive protein kit is high in sensitivity, good in stability, good in repeatability, capable of improving the production efficiency and shortening the reaction time and suitable for various POCT instruments.

The invention discloses a filler with a low dielectric constant, an epoxy-based composite material and a preparation method thereof, belongs to the technical field of composite materials, and comprises the preparation of the filler with the low dielectric constant and the preparation of the epoxy-based composite material with the low dielectric constant. The preparation method comprises the following steps: roasting zeolite powder at a high temperature, dispersing the roasted zeolite powder in deionized water, adding absolute ethyl alcohol, a template agent and a sodium hydroxide solution into a zeolite dispersion liquid, slowly dropwise adding a calculated amount of tetraethoxysilane into a mixed solution, and after the reaction is finished, filtering and washing the obtained mixture, and transferring the mixture into a drying oven for drying; roasting the product at high temperature to obtain the low-dielectric-constant filler; stirring and dispersing the low-dielectric-constant filler in epoxy resin at a high speed, adding a curing agent and an accelerant, and vacuumizing an obtained epoxy compound; pouring the epoxy compound into a mold, and heating and curing to obtain the epoxy composite material with low dielectric constant. The composite material has the beneficial effects that the dielectric constant of the composite material is effectively reduced, and the strength of the composite material is improved.