24results about How to "High thermal decomposition temperature" patented technology

The application relates to the technical field of AOC connector, and discloses a high-toughness bending-resistant AOC connector and a preparation method.The AOC connector comprises an optical cable assembly and an AOC connector head; the optical cable assembly comprises an optical fiber, an aramid yarn layer, a polyethylene outer protective layer and a braided layer; polyethylene, 4-hydroxystyrene grafted polyethylene, 1,3,5-tri(4-benzoxazinylphenyl)benzene and the like are mixed, extruded, granulated and heat-treated to obtain the polyethylene outer protective layer; the 1,3,5-tri(4-benzoxazinylphenyl)benzene contains multiple oxazine ring crosslinking polymerization sites, and crosslinking reaction occurs with the phenolic hydroxyl structure of the grafted polyethylene, the crosslinking degree of the molecular chains in the polyethylene is increased, the polyethylene molecular chains are not prone to relative slipping under external force, the ability to resist external force deformation is increased, the polyethylene outer protective layer has good strength and high-toughness bending resistance, and the bending resistance and protection performance of the AOC connector optical cable are improved.

This invention discloses a modification method for nanocrystalline magnetic core encapsulation materials. The method includes: S1: surface functionalization modification of nano-silica and boron nitride nanosheets by grafting amino and epoxy groups, respectively; S2: blending and dispersing the modified inorganic nanofiller with low-viscosity bisphenol A type epoxy resin, flexible epoxy resin diluent, latent curing agent, and coupling agent under high shear force to form a uniform and stable modified epoxy resin composition; S3: plasma cleaning and activation treatment of the nanocrystalline magnetic core; S4: encapsulating the modified epoxy resin composition on the surface of the magnetic core using a vacuum pressure impregnation process, followed by programmed temperature curing. This invention significantly improves the mechanical strength, thermal conductivity, and heat resistance of the encapsulation layer and reduces the high-frequency dielectric constant and loss by constructing an organic-inorganic interpenetrating network and interface reinforcement.

The invention relates to a high-hardness polyurethane adhesive as well as a preparation process and application thereof, and belongs to the technical field of polyurethane materials. The high-hardness polyurethane adhesive comprises a component A and a component B. The component A comprises the following raw materials in parts by weight: 30-50 parts of polyether polyol, 10-20 parts of a cross-linking agent, 5-10 parts of a composite filler, 0.5-1 part of a catalyst and 0.5-1 part of an antioxidant; and the component B is polyisocyanate. The adhesive prepared by the invention has high hardness and good toughness.

The application discloses a kind of high-performance outdoor full package imitation wood composite board and preparation method thereof, relate to polyurethane composite board technical field, the full package imitation wood composite board includes base board, and the polyurethane material of setting in the lower surface and the four around of base board, and the resin material of setting in upper surface.Its preparation method includes the following steps: pouring polyurethane material in the silica gel mould after surface treatment, place base board, mould pressing, make the polyurethane material with wood texture around and lower surface of base board composite, obtain intermediate product A;Resin material is rolled on the upper surface of intermediate product A, and is dried, to obtain full package imitation wood composite board;The silica gel mould after surface treatment is prepared by transferring real solid wood board texture.

The application belongs to the field of high polymer materials, and particularly discloses a modified basic magnesium carbonate and a PA12 composite material and a preparation method thereof.The preparation method of the modified basic magnesium carbonate comprises the following steps: adding sodium carbonate and magnesium chloride into a sodium hydroxide solution to perform a water bath reaction to obtain the basic magnesium carbonate; adding the basic magnesium carbonate and acrylic acid into deionized water to perform a water bath reaction to obtain acrylic acid modified basic magnesium carbonate; and adding the acrylic acid modified basic magnesium carbonate, glycidyl methacrylate and an initiator into an organic solvent aqueous solution to perform a water bath reaction to obtain the modified basic magnesium carbonate.The modified basic magnesium carbonate prepared by the application can decompose and absorb heat at high temperature, release water vapor and carbon dioxide and other non-combustible gases, dilute the oxygen concentration on the surface of the combustion object, and reduce the temperature of the combustion area, so as to play a role in flame retardation.In addition, the magnesium oxide produced by decomposition covers the surface of the material to form a protective layer, and further prevents the combustion.

This invention relates to the field of new energy vehicle battery pack accessories technology, and discloses an ICCS integrated busbar mechanism and its processing technology. The mechanism includes an FPCA module, an aluminum busbar, an insulating bracket, and series aluminum busbars. The FPCA module is mounted on the insulating bracket to form an independent module. Its flexible circuit board uses a modified fluorinated polyimide insulating substrate, which is polymerized from 2,2'-bis(trifluoromethyl)biphenyl-4,4'-diamine and pyromellitic dianhydride in a specific ratio. The aluminum busbar is soldered to the acquisition pad of the FPCA module, and the series aluminum busbars are connected to the aluminum busbars of each module. The processing technology includes hot-pressing copper-clad board fabrication, reflow soldering, ultrasonic welding of the aluminum busbar, and laser welding of the aluminum busbars. This invention improves the high-temperature resistance and low dielectric properties of the insulating substrate, ensuring the electrical reliability of the busbar mechanism for high-current transmission and signal acquisition under complex operating conditions.

This invention discloses bridging compounds based on 1,4,2,5-dioxadiazine and their synthetic methods. The bridging compounds based on 1,4,2,5-dioxadiazine are BNTD and BNPD, synthesized through the following steps: (1) Chlorooximation reaction: 1H-pyrazole-3-aminooxime is diazotized with an acidic solution of sodium nitrite to obtain 1H-pyrazole-3-chlorooxime; (2) Ring-closing reaction: 1H-1,2,4-triazole-3-chlorooxime and 1H-pyrazole-3-chlorooxime are condensed under the action of an organic base to obtain 3,6-bis(1-nitro-1,2,4-dioxadiazine). (3) Nitration reaction: 3,6-bis(1-nitro-1,2,4-triazol-3-yl)-1,4,2,5-dioxadiazine and 3,6-bis(1H-pyrazole-3-yl)-1,4,2,5-dioxadiazine were nitrated in the presence of nitric acid to obtain BNTD and BNPD, respectively. The compounds BNTD and BNPD of the present invention have good stability.

This invention belongs to the field of UV-curable resins, specifically relating to a self-healing UV-curable resin, its preparation method, and its applications. The preparation method includes the steps of: adding p-hydroxyanisole, glycidyl methacrylate, and 4-dimethylaminopyridine to an amino-terminated prepolymer and reacting, followed by separation to obtain the resin. The preparation method of the amino-terminated prepolymer includes adding an activator to a carboxyl-terminated prepolymer and reacting it, followed by adding a polyetheramine. The preparation method of the carboxyl-terminated prepolymer includes reacting a diol and an anhydride in a solvent. The invention provides corresponding products and their applications in the preparation of UV-curable coatings, UV-curable adhesives, and 3D printing consumables. Compared to existing technologies, the coating prepared by the method provided in this invention exhibits significant self-healing function and high elongation at break.

The invention discloses an epoxy resin composition containing a phosphorus-containing flame-retardant curing agent as well as a preparation method and application of the epoxy resin composition, and belongs to the technical field of preparation of flame-retardant epoxy resin compositions. The epoxy resin composition comprises the following components in parts by weight: 80-100 parts of an epoxy resin matrix, 10-30 parts of a phosphorus-containing flame-retardant curing agent, 6-60 parts of a curing agent, 0.1-0.3 part of an accelerant, 10-30 parts of a synergistic flame retardant, 40-60 parts of filler and the like. The phosphorus-containing flame-retardant curing agent is prepared from phenyl phosphoryl dichloride and a bisphenol compound through a polymerization reaction. The phosphorus-containing flame-retardant curing agent with phenolic hydroxyl reaction active groups is prepared by using low-cost phenylphosphoryl dichloride as a raw material and is matched with an existing flame-retardant system, so that the contradiction between the flame-retardant property and the physical property (mainly Tg) of an epoxy resin material is solved; and the flame retardant grade of V-0 and the higher glass transition temperature can be achieved when the addition amount of the flame retardant is lower.

The high-temperature-resistant brake pad material is prepared from the following raw materials in parts by weight: 18 to 22 parts of boron modified phenolic resin, 10 to 15 parts of modified carbon fiber, 4 to 7 parts of aramid fiber, 9 to 13 parts of ferrotitanium powder, 10 to 15 parts of potassium magnesium titanate lamellar crystal, 3 to 5 parts of nitrile rubber powder, 4 to 6 parts of natural graphite, 3 to 5 parts of petroleum coke, 5 to 8 parts of barite and 3 to 5 parts of aluminum oxide. According to the high-temperature-resistant brake pad material, boron-modified phenolic resin serves as a base body, functional components such as modified carbon fibers, aramid fibers, ferrotitanium powder and potassium magnesium titanate lamellar crystals are matched, and through the reasonable formula design and the forming technology, on the basis that it is guaranteed that a brake pad has the excellent friction and wear performance, the high-temperature-resistant brake pad material is obtained; the thermal stability and the interface bonding strength of the material under the high-temperature working condition are remarkably improved, and the problems that a traditional brake pad material is prone to heat fading and interface stripping under the high-temperature braking condition are solved.

The application discloses three designs and synthesis of thermal crosslinking thermal activation delayed fluorescent materials based on styrene groups and research thereof, relates to the technical field of fluorescent non-conjugated polymers, and the polymer is homopolymerized by using dendritic macromonomer with styrene at both ends, and different peripheral groups are adopted to encapsulate the dendritic core. The synthesis method comprises Suzuki coupling reaction, methylation reaction and nucleophilic substitution reaction. Research shows that the quenching phenomenon of the encapsulated dendritic TADF triplet exciton is significantly inhibited. The good solubility of the polymer enables the polymer to be applied to solution processing OLED devices. In addition, the dendritic monomer is polymerized by using an in-situ polymerization mode, the polymerization reaction yield of the AIBN initiator is avoided, and the reaction cost and reaction time are greatly saved. The obtained polymer is used to manufacture non-doped OLED devices, and the OLED devices exhibit excellent electroluminescent performance. The research shows certain potential for meeting the market demand of high-performance and low-cost OLEDs.

The application discloses intelligent temperature-regulating aluminum honeycomb composite board based on phase change material and a manufacturing process thereof, and relates to the field of building energy saving.The phase change material provided by the application is prepared from graphene composite cellulose and hydroxyethyl methacrylate as raw materials, and is formed through freezing forming, freeze drying and heat crosslinking treatment to form composite cellulose aerogel, and then vacuum impregnation of polyethylene glycol is carried out; the graphene composite cellulose is prepared by reaction of amino cellulose, epoxy functionalized graphene and epoxidized polymer, so that the heat conduction path of graphene and the rigidity and heat-resistant structure of polymer are synchronously introduced; the phase change material is filled in the aluminum honeycomb board, and then compression is carried out to obtain the intelligent temperature-regulating composite board.The phase change material prepared by the application has low leakage rate, high thermal conductivity and excellent mechanical properties, and is suitable for the field of building energy saving.

This invention relates to a PVC stabilizer, PVC composite materials, and parts comprising the same, belonging to the technical field of polymer compound compositions. The PVC stabilizer of this invention includes cerium phosphomolybdate, which imparts good thermal stability and excellent long-term aging resistance to PVC composite materials.

The invention relates to the field of structural adhesives, in particular to a single-component epoxy composition structural adhesive and a preparation method thereof. The single-component epoxy composition structural adhesive is prepared from the following raw materials: epoxy resin, a toughening agent, a curing agent, an accelerant, a silane coupling agent, a defoaming agent, a reinforcing agent, inorganic filler and the like. The finally prepared single-component epoxy structural adhesive has high and lasting bonding strength for engineering plastics such as PBT, PA and LCP and metal terminals, a cured adhesive layer has excellent flexibility and cold and hot impact resistance, high-temperature test of a reflow soldering process can be safely tolerated, and the single-component epoxy structural adhesive can be used as a single-component product, so that the structural adhesive has a good application prospect. Excellent room-temperature storage stability and heating rapid curing characteristics are required, so that the dual requirements of the modern electronic manufacturing industry on material performance and process efficiency are met.

This invention relates to the field of rare earth allicin complex technology, and particularly to a rare earth allicin complex, its preparation method, and its application. The method includes the following steps: dissolving a rare earth nitrate in a mixed solvent of water and acetonitrile to obtain a rare earth nitrate solution; dissolving allicin in ethanol to obtain an allicin solution; adjusting the pH of the rare earth nitrate solution; adding a surfactant and auxiliary ligand to the rare earth nitrate solution to obtain a first reaction solution; slowly adding the allicin solution dropwise to the first reaction solution; heating and stirring; collecting the precipitate by vacuum distillation to obtain a crude product; washing the crude product; and purifying it by column chromatography to obtain the rare earth allicin complex. This invention, using the above-mentioned rare earth allicin complex, its preparation method, and its application, significantly increases the thermal decomposition temperature of allicin. The redox bactericidal effect of rare earth ions synergistically combines with the broad-spectrum antibacterial activity of allicin, resulting in the rare earth allicin complex exhibiting excellent antibacterial effects.

The present invention relates to a polyalkylene carbonate-based resin having excellent thermal stability and a method for preparing the same, and provides a polyalkylene carbonate-based resin and a method for preparing the same, the polyalkylene carbonate-based resin comprising: a repeating unit represented by chemical formula 1; a repeating unit represented by Chemical Formula 2; and a unit derived from an organic acid anhydride, in which the polyalkylene carbonate-based resin has a peak in the region of 6.3 ppm to 6.7 ppm in the 1H NMR spectrum.

The invention relates to the technical field of high polymer materials, in particular to a butyl acrylate-based high polymer dispersant for polyimide foam as well as a preparation method and application of the butyl acrylate-based high polymer dispersant. The dispersing agent is prepared from butyl acrylate (BA), methyl methacrylate (MIMA), polyethylene glycol monomethyl ether acrylate (PEG400MEA), hydroxyethyl methylacrylate (HEMA) and functional monomers through free radical polymerization reaction, wherein the mass percent of each monomer is as follows: 20%-40% of BA, 10%-25% of MMA, 35%-60% of PEG400MEA, 3%-10% of HEMA and 1%-5% of functional monomers. The functional monomer is one or more of acrylic acid, methacrylic acid, sodium p-styrene sulphonate or N-hydroxymethyl acrylamide. In the preparation process, peroxide or an azo substance initiator is adopted, and free radical reaction is carried out under the protection of inert gas. The dispersant belongs to anionic macromolecules, the weight-average molecular weight is 5000-50000, and the molecular weight dispersion coefficient (PDI 1.2-2.5).

This invention discloses a polypropylene carbonate composite material modified with tea seed cake and its preparation method. The polypropylene carbonate composite material comprises modified tea seed cake and a polypropylene carbonate matrix, wherein the modified tea seed cake is obtained through surface modification via alkali treatment, silane coupling agent treatment, or organic acid treatment. This invention significantly improves the dispersibility and interfacial compatibility of tea seed cake, a natural biomass filler, within the polypropylene carbonate matrix by employing specific surface treatment methods. Simultaneously, by utilizing the active components of tea seed cake itself, a polypropylene carbonate composite material with significantly improved mechanical properties, thermal stability, anti-aging properties, and biodegradability is prepared, achieving high-value utilization of agricultural waste.

The invention belongs to the technical field of material preparation, and relates to a polyarylene ether nitrile wear-resistant dielectric composite material as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly, synthesizing poly (arylene ether nitrile) matrix resin with a phthalonitrile-terminated biphenyl structure by adopting a nucleophilic substitution reaction, and secondly, introducing a copper phthalocyanine modification layer on the surface of a molybdenum disulfide nanosheet by utilizing a chemical grafting method, so as to prepare the novel functional nanofiller. The cyano group of copper phthalocyanine in the functionalized nanofiller not only can improve the compatibility between the molybdenum disulfide nanosheet and the polyarylene ether nitrile matrix, but also can be chemically crosslinked with the cyano group of the matrix resin, and then the cyano group and the cyano group are combined through a film casting method and then subjected to a solid-phase chemical reaction to prepare the composite material. The molybdenum disulfide nanosheets have the effects of improving the wear resistance and the dielectric constant, and the finally prepared composite material has the advantages of high glass transition temperature, high dielectric constant, excellent wear resistance, low friction coefficient, good processability, simple and efficient preparation process, and suitableness for large-scale production and application.

This invention discloses a graphene-reinforced TPU adhesive and its preparation process, relating to the field of polyurethane materials technology. The invention involves mixing epoxy resin and a silane coupling agent, reacting them under the catalysis of dibutyltin dilaurate to obtain a silane epoxy resin, which is then reacted with isophorone diisocyanate and polytetrahydrofuran ether diol to obtain a polyurethane prepolymer solution. Modified graphene is then added, dispersed at high speed, and a chain extender and curing agent are added. The mixture is heated to react, and after the reaction is complete, cooled to room temperature to obtain the graphene-reinforced TPU adhesive. This invention improves the mechanical strength and thermal stability of the TPU adhesive by adding modified graphene. Surface modification of graphene is achieved by using quaternary ammonium salt didodecyl dimethyl ammonium bromide as a graphene modifier. The intercalation reaction between didodecyl dimethyl ammonium bromide and graphene oxide reduces the interfacial energy between graphene and thermoplastic polyurethane, enhancing the dispersibility and barrier properties of the TPU adhesive.

The invention belongs to the technical field of flexible display, and relates to a low-viscosity high-solid-content polyamide acid composite solution as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly, respectively preparing a polyamide acid solution A and a polyamide acid solution B; mixing the polyamic acid solution A and the polyamic acid solution B, and stirring at room temperature for 12-24 hours to obtain a target polyamic acid composite solution; wherein the solid mass in the polyamide acid solution B accounts for 1%-10% of the total solid mass in the polyamide acid solution A and the polyamide acid solution B after mixing. According to the polyamic acid composite solution, a polyamic acid solution A serves as a mechanical skeleton, a polyamic acid solution B serves as a function regulator, a semi-interpenetrating network precursor structure of a linear long chain and an active short chain is constructed before imidization, the semi-interpenetrating network precursor structure is converted into a chemical cross-linked network in situ after imidization, the thermal performance and the mechanical performance are improved, meanwhile, the thermal expansion coefficient is reduced, and the thermal conductivity is improved. The compound has good compatibility with various active end-capping reagents, and is simple in preparation process, mild in condition and suitable for large-scale production.

The application belongs to the field of alkyd resin, and particularly relates to a high-adhesion alkyd resin and a preparation method thereof. The high-adhesion alkyd resin is prepared from soybean oil acid, a nitrogen-containing heterocyclic compound, phthalic anhydride, pentaerythritol and hydroxyl-terminated polydimethylsiloxane. By introducing the nitrogen-containing heterocyclic compound (such as quinoline and triazole) and the hydroxyl-terminated polydimethylsiloxane (PDMS), the molecular structure of the alkyd resin is significantly optimized, so that the alkyd resin is superior to the traditional alkyd resin in terms of heat resistance, corrosion resistance, mechanical strength, adhesion and construction performance. The alkyd resin is suitable for the fields of high-temperature anticorrosive paint, ship paint and industrial protective paint, and exhibits significant technical advantages and broad market prospects.

The invention provides an epoxy resin composition and a preparation method thereof, and a bolt capacitor cover plate, the epoxy resin composition comprises epoxy resin, a curing agent, a curing accelerator, an inorganic filler, a coupling agent, a flame retardant and a release agent; the epoxy resin comprises first epoxy resin and second epoxy resin, and the first epoxy resin is a compound as shown in a structural formula 1; the average molecular weight of the compound as shown in the structural formula 1 is 2000-7000; the second epoxy resin comprises one or more of diphenol propane type epoxy resin, phenolic aldehyde type epoxy resin, polyphenol glycidyl ether type epoxy resin, naphthalene type epoxy resin and biphenyl type epoxy resin. When the epoxy resin composition provided by the invention is used for preparing the bolt capacitor cover plate, the cover plate can meet long-time high-temperature use, the cover plate is not cracked, and meanwhile, the strength of the bolt capacitor cover plate can be improved.

The application discloses a kind of nano graphene lubricating oil and preparation method thereof, it is related to lubricating oil technical field.The application first with modified zirconium-titanium composite particles as catalyst to catalytically synthesize base oil, improve heat resistance effect;Then under the assistance of microwave, graphene is stripped to improve the dispersibility of graphene in lubricating oil, simultaneously with the surface of modified zirconium-titanium particles form hydrogen bond network, reduce fatigue wear, prolong service life, on this basis, particle and graphene produce electrochemistry deposition in the process of friction, reach the effect of self-repairing.Modified zirconium-titanium composite particles are first by precursor sol injection pre-cooled liquid nitrogen copper mould, quick freezing, vacuum sublimation drying removes ice crystal, forms snowflake-like hierarchical porous structure, improves lubricating effect;Then low-temperature annealing, form Zr-O-Ti mixed oxide framework, effectively inhibit pore collapse, prolong service life;Again through surface hydroxyl and capillary action, adsorb ionic liquid to form coating, enhance lubricating effect.