74 results about "Vinylphosphonic acid" patented technology

The invention discloses a nano blocking agent for drilling fluid and a preparation method thereof, and belongs to the technical field of blocking agents, the nano blocking agent for drilling fluid is prepared by reaction of a core layer blocking agent and a shell layer blocking agent, the core layer blocking agent is prepared by reacting nano silicon dioxide, gamma-methacryloxypropyltrimethoxysilane and a first part of vinylphosphonic acid, and has secondary blocking capability; and the shell blocking agent is prepared by reacting a second part of vinyl phosphonic acid, styrene and 2-dodecene-1-yl succinic anhydride, and has the characteristic of flexibility. The nano plugging agent has rigid supporting and flexible deformation capabilities, and the high-temperature stability and compressive strength of a plugging layer are remarkably improved. The chemical binding force of the plugging agent and the rock is enhanced; the hydrolysable methoxyl reserved in the core layer provides a secondary plugging function, and the plugging validity period is prolonged. The invention relates to a preparation method of a nano blocking agent for drilling fluid, which is used for preparing the nano blocking agent for drilling fluid.

The invention relates to the technical field of soil remediation, in particular to a biochar-humic acid-calcium alginic acid composite saline-alkali soil modifier and a preparation and application method thereof. The modifier adopts a multi-layer structure design: biochar is pre-adsorbed by calcium chloride, compounded with sodium humate, and then crosslinked with sodium alginate to form a gel to form a composite inner core; secondly, sulfobetaine methacrylate and vinyl phosphonic acid are introduced into a sodium alginate molecular chain through graft polymerization, and modified sodium alginate is obtained to serve as an outer layer coating material; and finally, dipping the composite inner core into the outer layer solution, and carrying out graded recalcification by calcium chloride and short-time treatment by sodium sulfate to obtain a final product. Through the synergistic effect of calcium ion slow release of the inner core and zwitterionic characteristics of the outer layer, efficient replacement and long-term stable regulation and control of soil sodium ions are achieved, the pH value, the conductivity and the alkalization degree of soil are remarkably reduced, the water holding capacity is effectively improved, and the soil conditioner is suitable for sustainable improvement of moderate and severe saline-alkali soil.

The invention relates to the technical field of water treatment, in particular to a rare earth composite antibacterial scale inhibitor and a preparation method thereof.The preparation method comprises the steps that glycidyl methacrylate, vinylphosphonic acid, N-vinylthiourea and acrylic acid are mixed, a mixed solvent of deionized water and ethyl alcohol is added, nitrogen is introduced after the mixture is stirred and dissolved, azodiisobutyronitrile is added, the mixture is stirred at the constant temperature for a reaction, and the rare earth composite antibacterial scale inhibitor is obtained; the preparation method comprises the following steps: preparing a quadripolymer solution, adding trimethylamine hydrochloride into the quadripolymer solution, carrying out heating and stirring reaction, adjusting the pH value to be neutral to obtain a cationized copolymer solution, dropwise adding the cationized copolymer solution into a cerous nitrate solution, carrying out stirring reaction at room temperature, carrying out centrifugal washing, and carrying out freeze drying to obtain the rare earth composite antibacterial scale inhibitor. The prepared antibacterial scale inhibitor is remarkable in effect, metal ions can be combined in scale inhibition, growth of scale crystals is prevented, the rare earth ions and the copolymer are synergistically antibacterial, and the antibacterial scale inhibitor is durable, stable, good in dispersity and capable of adapting to complex environments.

The present application belongs to the field of rare earth separation, and particularly discloses a method for separating heavy rare earth ions. In the method, a vinyl complexing agent including at least one of vinyl phosphonic acid, vinyl sulfonic acid, vinyl acetic acid or 4-vinyl benzyl chloride is used to selectively complex heavy rare earth ions in an aqueous phase, so as to obviously increase the distribution coefficient between different heavy rare earth ions. Then, the aqueous phase containing the complex of heavy rare earth ions is subjected to extraction separation of different heavy rare earth ions with an organic phase containing an extractant, so as to achieve the purpose of improving the separation efficiency.

The invention relates to the technical field of high polymer materials, and particularly discloses a flame-retardant PVC (polyvinyl chloride) sheet and a preparation method thereof.Carboxymethyl chitosan is adsorbed on the surface and in pores of sepiolite through the adsorption effect of sepiolite powder, the carboxymethyl chitosan contains a large number of hydroxyl groups and amino groups, and the hydroxyl groups and the amino groups can chelate zinc ions, so that the flame-retardant PVC sheet is prepared. Then calcining is performed in a nitrogen atmosphere, carboxymethyl chitosan is converted into a relatively compact carbon layer, zinc salt is converted into zinc oxide, and the flame retardant property of sepiolite is improved through the generated carbon layer and zinc oxide composite layer; then through addition reaction between double bonds, 1, 4-butylene glycol and diethyl vinylphosphonate are grafted on the surface of the sepiolite composite material, so that the mechanical property and flame retardant property of the PVC sheet material are further improved.

This invention discloses a vinylphosphonic acid-acrylonitrile copolymer adhesive, its preparation method, and its application. The vinylphosphonic acid-acrylonitrile copolymer adhesive comprises the following components by mass: 76%–92% acrylonitrile, 4%–12% acrylic monomers, and 4%–12% vinylphosphonic acid monomers. The vinylphosphonic acid-acrylonitrile copolymer adhesive is prepared by subjecting each monomer to a free radical polymerization reaction. By simultaneously introducing flexible acrylic segments and vinylphosphonic acid functional units into a rigid acrylonitrile skeleton, the copolymer adhesive possesses strong adhesion, flexibility, electrochemical stability under high pressure conditions, and applicability to different metal ion systems.

A recovery treatment method for ammonia-containing tail gas in the later stage of aromatic nitrile synthesis. The method comprises: introducing the ammonia-containing tail gas sequentially into a first spray absorption tower and a second spray absorption tower; absorbing, in a liquid phase, ammonia from the ammonia-containing tail gas to realize the recovery of ammonia; and directly discharging exhaust gas; an absorbent A in the first spray absorption tower is water; and an absorbent B in the second spray absorption tower comprises glycolic acid, vinylphosphonic acid and aluminum sulfate. In the method, the recovery of ammonia from the ammonia-containing tail gas is increased by means of two-stage spraying, and the ammonia content in the treated tail gas is low and satisfies emission standards.

The present invention relates to the composition, preparation and application of a retarder for ultra-high temperature cementing and cementing slurry. The synthetic monomers of the high temperature retarder include: 2-acrylamido-2-methylpropanesulfonic acid (AMPS), acrylic acid (AA), N,N-dimethylacrylamide (DMAA), and vinylphosphonic acid (VPA). The high temperature retarder contains a constituent unit A shown in Formula 1, a constituent unit B shown in Formula 2, a constituent unit C shown in Formula 3, and a constituent unit D shown in Formula 4. The ultra-high temperature retarder of the present invention has stable chemical properties and a temperature resistance of up to 250°C. While having high temperature resistance, it does not affect the sedimentation stability of cement slurry at high temperatures, can significantly prolong the thickening time of cement slurry at high temperatures, and the cement stone has higher early strength at low temperatures. It effectively solves the problem of reduced retarding effect caused by severe sedimentation of cement slurry at high temperatures, and can ensure the quality and safety of cementing construction.

The invention discloses a preparation method of flame-retardant polyester-containing plastic particles, and relates to the technical field of plastic particles. The modified flame retardant is tightly combined with secondary amine groups in polyester, so that the hydrolysis resistance and mechanical strength of the plastic are improved. According to the modified flame retardant, chlorine groups of vinylphosphonic acid bis (2-chloroethyl ester) and hydroxyl groups of m-hydroxybenzoic acid protected by ester groups react under the low-temperature condition, plastic particles can be promoted to be dehydrated into carbon in the presence of phosphate groups, continuous proceeding of a chain reaction during plastic combustion is prevented, the flame retardant performance is preliminarily achieved, an aromatized structure is assisted, and the flame retardant performance is improved. The formation of a low-permeability and high-continuity carbon layer is promoted, the transmission of combustible gas and heat is prevented, and the flame-retardant effect is further enhanced; after ester groups are removed from carboxyl, the carboxyl reacts with 2, 6-dihydroxytoluene to be combined to form a benzophenone structure, the anti-ultraviolet effect is achieved, the methyl is matched, the crystallization rate of plastic particles is increased, a more compact stacking structure is formed, and therefore the mechanical strength of the plastic particles is enhanced.

This invention belongs to the field of tempered laminated glass technology, specifically relating to a bubble-free composite molding process for tempered laminated glass. A functional coating is also provided, which is prepared from the following components: modified silicone-acrylic emulsion, modified nano-cesium tungsten bronze, curing agent, dispersant, leveling agent, defoamer, silane coupling agent, ultraviolet absorber, film-forming aid, and deionized water. This invention utilizes the crosslinking modification of vinyltriisopropoxysilane and the grafting modification of vinylphosphonic acid to effectively improve the interfacial bonding force between the emulsion film and the glass substrate and functional fillers. Simultaneously, a modifier prepared by aminotrimethylenephosphonic acid and lanthanum chloride hexahydrate is used to modify the surface of nano-cesium tungsten bronze, solving the technical problem of easy agglomeration of unmodified nano-cesium tungsten bronze, thus laying the foundation for the high performance of functional coatings and tempered laminated glass.

The invention discloses a preparation method of flame-retardant polyester-containing plastic particles, and relates to the technical field of plastic particles. The modified flame retardant is tightly combined with secondary amine groups in polyester, so that the hydrolysis resistance and mechanical strength of the plastic are improved. According to the modified flame retardant, chlorine groups of vinylphosphonic acid bis (2-chloroethyl ester) and hydroxyl groups of m-hydroxybenzoic acid protected by ester groups react under the low-temperature condition, plastic particles can be promoted to be dehydrated into carbon in the presence of phosphate groups, continuous proceeding of a chain reaction during plastic combustion is prevented, the flame retardant performance is preliminarily achieved, an aromatized structure is assisted, and the flame retardant performance is improved. The formation of a low-permeability and high-continuity carbon layer is promoted, the transmission of combustible gas and heat is prevented, and the flame-retardant effect is further enhanced; after ester groups are removed from carboxyl, the carboxyl reacts with 2, 6-dihydroxytoluene to be combined to form a benzophenone structure, the anti-ultraviolet effect is achieved, the methyl is matched, the crystallization rate of plastic particles is increased, a more compact stacking structure is formed, and therefore the mechanical strength of the plastic particles is enhanced.

According to the invention, N, N-bis (4-methoxyphenyl) p-phenylenediamine and vinyl phosphonate are used as main raw materials to prepare triphenylamine-imino di (ethyl-2-phosphonic acid), the chemical name of the triphenylamine-imino di (ethyl-2-phosphonic acid) is N-{4-[N, N-bis (4-methoxyphenyl) amino] phenyl} imino di (ethyl-2-phosphonic acid), and the structural formula of the triphenylamine-imino di (ethyl-2-phosphonic acid) is shown in the description. The organic micromolecule hole transport material is used as an organic micromolecule hole transport material in a perovskite solar cell, has the property of absorbing ultraviolet rays, can convert ultraviolet rays into visible light, and is good in solubility.

The invention relates to the use of a composition comprising a polymer P obtained by radical copolymerization of a mixture of (i) vinylphosphonic acid; (ii) at least one monomer M1, which is a C1-C10 alkyl acrylate or a C1-C10 alkyl methacrylate; and (iii) at least one monomer M2, which is a C11 to C30 alkyl acrylate or a C11 to C30 alkyl methacrylate.

The invention discloses a rare earth modified high polymer material and a preparation method thereof, and relates to the technical field of high polymer materials. When the rare earth modified high polymer material is prepared, nano cerium dioxide and 2-chloroethyltriethoxysilane react to prepare pre-modified nano cerium dioxide; carrying out quaternization reaction on the pre-modified nano cerium dioxide and 7-(diethylamino) coumarin to generate modified nano cerium dioxide; the preparation method comprises the following steps: carrying out melt grafting on pre-irradiated polyethylene, vinyl phosphonic acid and 2-(allyloxy)-4, 6-dichloro-1, 3, 5-triazine to prepare pre-modified polyethylene; the pre-modified polyethylene and N-butyl-2, 2, 6, 6-tetramethyl-4-piperidylamine are subjected to a reaction, and modified polyethylene is prepared; and carrying out melt blending on the modified polyethylene and the modified nano cerium dioxide to prepare the rare earth modified high polymer material. The rare earth modified high polymer material prepared by the invention has good flame retardant property, antibacterial property, tensile strength and anti-aging property.

Disclosed herein are compositions comprising a modified oligonucleotide. In some embodiments, the oligonucleotides include hydrophobic moieties. In some embodiments, the oligonucleotide comprises a vinyl phosphonate. In some embodiments, the oligonucleotides include modified oligonucleotide sugars, such as 2 '-modified ribose molecules. In some embodiments, the oligonucleotides include a modified inter-nucleoside linkage, such as a thiophosphate linkage. In some embodiments, the oligonucleotide comprises a siRNA. In some embodiments, the siRNA comprises a duplex region having a protruding end at either end.

This invention discloses a functionalized graphene quantum dot fluorescent ink composition and its preparation method, belonging to the technical field of anti-counterfeiting printing functional materials. The ink composition, based on a total weight of 100 parts, comprises 0.8-2.5 parts of graphene quantum dots co-modified with phosphonic acid and poly(N-vinylcaprolactam), 25-40 parts of an aqueous polyurethane dispersion, 0.5-1.5 parts of benzo-15-crown-5-carboxylic acid, 0.3-0.8 parts of a dispersant, 0.2-0.6 parts of a leveling agent, 0.1-0.3 parts of a defoamer, and the balance being deionized water. The quantum dots are prepared by a one-step hydrothermal method using citric acid, N-vinylcaprolactam, and vinylphosphonic acid as core raw materials in the presence of an initiator and a crosslinking agent. The ink of this invention simultaneously possesses photoluminescence, temperature response, and Fe... 3+ It features a triple anti-counterfeiting function with specific identification, and there is a synergistic enhancement effect between temperature sensitivity and ion response. At the same time, the ink has excellent storage stability and printability, making it suitable for high-end anti-counterfeiting fields.

To provide a fluorinated copolymer comprising a fluorinated vinylic monomer and a hydrophilic comonomer.SOLUTION: The invention relates to novel linear, semi-crystalline, functional fluoropolymers that have been obtained by copolymerizing a fluorinated vinylic monomer and a hydrophilic monomer chosen from vinyl alkyl acids, vinyl phosphonates, functional acrylamides, carbonates, vinyl ethers, alkoxy compounds, and double hydrophilic group monomers.SELECTED DRAWING: None

The application discloses a kind of high-temperature-resistant flame-retardant fluororubber composite material for switchgear and a preparation method thereof, and relates to the technical field of fluororubber.The application uses gamma ray co-irradiation method to graft polyvinyl fluoride with diethyl allyl phosphate, and reacts with high methyl vinyl silicone rubber under the action of triallyl phosphate to form a dense three-dimensional hybrid network, increase the phonon scattering resistance to reduce the heat conduction efficiency, and the phosphorus component and the silicon rubber combustion product synergistically form a gas-solid dual flame-retardant barrier.The application grafts talc powder with vinyltriethoxysilane and modifies it by radiation and polymerization with diethyl vinylphosphonate to obtain a lamellar filler, delays heat transfer, and induces the directional formation of carbon layer to form a "lamellar-glass-carbon" composite barrier layer.The surface modification increases the specific surface area, improves the efficiency of free radical capture, and the hybrid crosslinking point formed by graft copolymerization and the matrix network form a double phonon scattering barrier.The high-temperature-resistant flame-retardant fluororubber composite material for switchgear prepared by the application has the effects of high-temperature resistance and flame retardance.

The application provides a phosphorus modified butadiene styrene rubber polymer and a preparation method and application thereof. The polymer structure is that the method is: butadiene styrene rubber polymer is dissolved in a solvent to obtain a polymer glue solution; a vinyl phosphonate monomer and an initiator are added into the glue solution to carry out a free radical grafting reaction to obtain a target product. The phosphorus modified butadiene styrene rubber polymer prepared by the application has good adhesion to the pole piece and the diaphragm, good flame retardance and electrolyte swelling resistance, can improve the safety performance of the battery, and reduce the risks of battery swelling, fire and explosion.

The application discloses a preparation method of a supramolecular nanometer imbibition oil displacement agent and application of the supramolecular nanometer imbibition oil displacement agent in fracturing, and relates to the technical field of oilfield exploitation. Methoxy polyethylene glycol amine is added dropwise into an activated NCA solution prepared by reaction of L-glutamic acid-5-benzyl ester N-carboxylic anhydride and triphosgene, and then is reacted and precipitated to obtain a polyethylene glycol-polybenzyl glutamate block copolymer; the block copolymer is dissolved in a hydrogen bromide solution to obtain a debenzylated product; under initiation of ammonium persulfate, the debenzylated product is reacted with vinyl phosphonic acid to obtain a supramolecular nanometer imbibition oil displacement powder; and the supramolecular nanometer imbibition oil displacement agent is obtained by dissolving, homogenizing and sterilizing filtering the powder. The supramolecular nanometer imbibition oil displacement agent is chelated with calcium and magnesium ions through phosphonic acid groups to form a stable network, so that the supramolecular nanometer imbibition oil displacement agent has long-term and stable effects in high-temperature and high-salt reservoirs; the supramolecular nanometer imbibition oil displacement agent has a flexible size matched with a pore throat structure, and can trigger capillary spontaneous imbibition by using ultralow interfacial tension to achieve efficient oil displacement.

The invention discloses an ultraviolet-curable functional monomer with flame-retardant and bonding characteristics, a coating, a preparation method and application. The functional monomer is a reaction product of a synthesis reaction of vinylphosphonic acid and sorbitol, a reaction product of a synthesis reaction of vinylphosphonic acid and triglycidyl isocyanurate or a reaction product of a synthesis reaction of vinylphosphonic acid and hexamethanol melamine; the ultraviolet curable coating comprises a functional monomer, a carbon source monomer, a silane coupling agent and a photoinitiator. The ultraviolet curing coating is coated on the surface of the extruded polystyrene board for light curing, so that the flame retardant property of the extruded polystyrene board and the bonding property of the extruded polystyrene board and inorganic bonding mortar can be improved at the same time, and the fire safety, the construction convenience and the bonding stability of an outer wall external thermal insulation system taking the extruded polystyrene board as a thermal insulation material are enhanced; the ultraviolet curing coating disclosed by the invention is safe, environment-friendly, fast and efficient, and has important significance on green and safe development of building thermal insulation materials.

The application discloses an ultrahigh-temperature large-temperature-difference retarding agent for oil well cement and a preparation method thereof. The ultrahigh-temperature large-temperature-difference retarding agent for oil well cement is obtained through copolymerization reaction of water as a solvent, azobisdimethylaminoformamide hydrochloride as an initiator and monomers of vinyl phosphonic acid, diethyl vinyl phosphonate, divinylbenzene, triphenyl ethenyl phenol polyoxyethylene ether and N-vinyl pyrrolidone. The ultrahigh-temperature large-temperature-difference retarding agent for oil well cement is a polymer made of monomers with rigid groups, the polymer does not decompose under ultrahigh-temperature conditions and still maintains original retarding performance, the thickening time is convenient to adjust, and the retarding agent dosage is not increased, so the strength of the top cement stone is also developed relatively fast, and over-retarding is avoided.

The invention discloses a pet deodorant, a preparation method and an application thereof. The pet deodorant comprises the following raw materials in percentage by weight: 0.5-1.5% of EM composite bacteria, 0.05-0.15% of vinylphosphonic acid, 0.06-0.16% of tea extract, 0.03-0.09% of deodorizing surfactant, 0.02-0.06% of chelating agent, and the balance is water. The pet deodorant of the invention combines EM composite bacteria, organic acid and plant extract to effectively remove malodors such as ammonia and hydrogen sulfide. The formula is safe and environmentally friendly, suitable for all kinds of pets, and easy to operate. The product is mild, does not hurt pets, is easy to use at home, and quickly eliminates odors on pets.

According to the invention, N, N-bis (substituted or unsubstituted phenyl) p-phenylenediamine and vinyl phosphonate are used as main raw materials to prepare triphenylamine-imino bis (ethyl-2-phosphonic acid), the chemical name of the triphenylamine-imino bis (ethyl-2-phosphonic acid) is N-(4-(N, N-bis (substituted or unsubstituted phenyl) amino) phenyl) imino bis (ethyl-2-phosphonic acid), and the triphenylamine-imino bis (ethyl-2-phosphonic acid) has a photo-electromagnetic stimulation-response characteristic, and can be used for preparing a photoelectromagnetism response material. The compound can be used as an organic micromolecule photoelectric functional material, or used as an organic micromolecule hole transport material which has the property of absorbing ultraviolet rays, can convert the ultraviolet rays and is high in solubility in a perovskite solar cell.

The present application relates to the technical field of ore grinding, and particularly discloses a composite grinding aid for quartz ore grinding and a preparation method thereof.The composite grinding aid provided by the present application has vinyl phosphonic acid as a core anchoring monomer, and the phosphonic acid group in the molecular structure of the vinyl phosphonic acid has extremely strong affinity for hard acid type metal impurities such as iron, titanium and aluminum exposed in microcracks of quartz crystals; methyl allyl alcohol polyoxyethylene ether is used as a steric hindrance monomer to further prevent quartz fine particles from approaching each other and re-agglomerating, thereby significantly improving the fluidity of the ore slurry; and acryloyl morpholine is used as a polarity adjusting monomer, and the rigid morpholine ring structure in the molecule of the acryloyl morpholine greatly enhances the stability of the polymer main chain, avoids the stratification and precipitation of the grinding aid in the ore slurry, adjusts the viscosity of the system, avoids the abnormal fluidity of the ore slurry caused by the excessively long polyether chain, and ensures the stability of the grinding effect.

The application provides a perovskite solar cell and a preparation method thereof, and relates to the technical field of solar cells. The perovskite solar cell comprises: a transparent conductive layer arranged on a glass substrate and used for collecting photo-generated holes; a hole transport material layer arranged on the transparent conductive layer and used for selectively extracting photo-generated holes and regulating interface energy levels, wherein the material of the hole transport material layer comprises a benzene bridged double (R-substituted benzene [c] carbazole)-cyano vinyl phosphonic acid self-assembled monolayer material; the self-assembled monolayer material takes a benzene group as a bridging unit, the benzene group is connected to two substituted benzene [c] carbazole units, a nitrogen atom of each substituted benzene [c] carbazole unit is connected to a substituted phenyl group, and the substituted phenyl group is anchored to the transparent conductive layer through a cyano vinyl phosphonic acid group to form stable chemical adsorption; and a perovskite layer arranged on the hole transport material layer and used for absorbing photons to generate electron-hole pairs.

The application discloses a kind of nanometer plugging agent for drilling fluid and preparation method thereof, belong to plugging agent technical field, nanometer plugging agent for drilling fluid, this nanometer plugging agent is prepared by core layer plugging agent and shell layer plugging agent reaction, core layer plugging agent is prepared by nanometer silicon dioxide, gamma-methacryloxypropyl trimethoxysilane and first portion of vinyl phosphonic acid, with secondary plugging capacity;Shell layer plugging agent is prepared by second portion of vinyl phosphonic acid, styrene and 2-dodecane olefin-1-yl succinic anhydride, with flexible characteristics.Nanometer plugging agent has rigid support and flexible deformation capacity, significantly improve the high temperature stability and compressive strength of plugging layer.Enhance the chemical bonding force of plugging agent and rock;The hydrolysable methoxy retained in core layer provides secondary plugging function, prolongs the effective period of plugging.A kind of preparation method of nanometer plugging agent for drilling fluid, it is used for preparing nanometer plugging agent for drilling fluid.

The present invention discloses a method and application for preparing a proton exchange membrane using a polymer chemical vapor deposition technology. The method comprises: placing a substrate on a sample stage of a chemical vapor deposition reactor; arranging a nickel-chromium wire above the reaction stage and heating it to a predetermined temperature; heating an initiator, di-tert-butyl peroxide, a first functional monomer, 1H,1H,2H,2H-perfluorodecyl acrylate, a second functional monomer, methacrylic acid or 4-methyl-5-vinylthiazole, and a third functional monomer, vinylphosphonic acid, to vaporize them and flow them into a reactor; the initiator enters the reactor and is heated and decomposed by the nickel-chromium wire to generate free radicals, thereby initiating a free radical chain polymerization reaction between the monomers; the synthesized polymer is deposited on a substrate material to form a thin film to obtain a proton exchange membrane. The present invention synthesizes a multi-component nanoscale proton exchange membrane on the surface of a Nafion membrane in one step, preparing a proton exchange membrane with high proton conductivity at high temperatures.

The invention discloses a high-temperature-resistant flame-retardant fluororubber composite material for a power distribution cabinet and a preparation method thereof, and relates to the technical field of fluororubber. According to the preparation method, polyvinyl fluoride is grafted with allyl diethyl phosphate by adopting a gamma-ray co-radiation method and reacts with high methyl vinyl silicone rubber under the action of triallyl phosphate to form a compact three-dimensional hybrid network, so that the phonon scattering resistance is increased to reduce the heat conduction efficiency; the phosphorus-based component and a silicone rubber combustion product cooperate to form a gas phase-solid phase dual flame-retardant barrier; vinyltriethoxysilane grafted talcum powder is subjected to polymerization modification with diethyl vinylphosphonate through radiation to prepare a lamellar filler, heat transfer is delayed, and a carbon layer is induced to directionally form a'lamellar-glass-carbon 'composite barrier layer; the specific surface area is increased through surface modification, the free radical capture efficiency is improved, and hybrid cross-linking points formed through graft copolymerization and a matrix network form a dual phonon scattering barrier. The prepared high-temperature-resistant flame-retardant fluororubber composite material for the power distribution cabinet has high-temperature-resistant and flame-retardant effects.

The invention discloses an anti-cracking low-smoke halogen-free optical cable flame-retardant sheath material and a preparation method thereof, and relates to the technical field of optical cable sheaths. According to the invention, vinyl phosphonate and styrene are subjected to a polymerization reaction to obtain a flame-retardant elastomer; and mixing the matrix resin, the flame-retardant elastomer, the flexibilizer, the filler, the stabilizer, the dispersant and the coloring agent, banburying, and carrying out melt extrusion to obtain the anti-cracking low-smoke halogen-free optical cable flame-retardant sheath material. The sheath material has the advantages of low smoke, no halogen, environmental protection, excellent flame retardation and cracking resistance, and considerable application prospect.