427 results about "Benzoyl peroxide" patented technology

The invention discloses a high temperature and high pressure resistant electric power tube and a preparation method thereof, the electric power tube comprises the following raw materials by weight: 100-120 parts of polyethylene master batch, 5-10 parts of a modifier, 0.5-1 part of benzoyl peroxide and 20-30 parts of a modified filler, in a melt extrusion process of the raw materials, a maleimide structure on a molecular side chain of the modifier can be grafted with a polyethylene molecular chain, and the molecular chain of the modifier can be grafted with the polyethylene molecular chain. Meanwhile, an organic silicon chain segment and a benzene ring structure are added in a polymer molecule, the high-temperature-resistant effect of the material is improved, after reflux treatment in water, a siloxane structure in the modified filler and a siloxane structure in a modifier molecule can be subjected to hydrolytic condensation, and therefore the high-temperature-resistant and high-pressure-resistant effects of the material are improved. According to the invention, polyhedral oligomeric silsesquioxane is taken as a core, boron nitride is taken as a shell to form a core-shell structure, and the three-dimensional grid structure of the polymer can greatly improve the high-temperature-resistant and high-pressure-resistant effects of the polymer.

The invention provides a degradable environment-friendly packaging material and a preparation process thereof, and belongs to the technical field of packaging materials. The preparation method comprises the following steps: preparing the modified nano montmorillonite; preparing a composite antibacterial additive; preparing a barrier additive; and preparing the degradable environment-friendly packaging material. The preparation method comprises the following steps: by taking methacrylic acid (2-dimethylaminoethyl) ester and acrylic acid as raw materials, modifying nano-montmorillonite under the initiation of benzoyl peroxide, performing quaternary ammonium salinization, and performing in-situ synthesis of nano-zinc oxide on the surface of the quaternary ammonium salinized montmorillonite through a hydrothermal reaction to prepare the composite antibacterial additive. When the composite antibacterial additive is added into polylactic acid to prepare a packaging material, the growth of various microorganisms such as bacteria and fungi can be effectively inhibited, the packaging material is endowed with strong antibacterial protection capability, and the composite antibacterial additive has a more lasting antibacterial effect so as to prolong the antibacterial validity period of the packaging material.

The invention discloses a thiazolinone acrylic acid silane ester self-polishing antifouling resin and a preparation method and application of the thiazolinone acrylic acid silane ester self-polishing antifouling resin. The preparation method of the thiazolinone acrylic acid silane ester self-polishing antifouling resin mainly comprises the following steps: in a nitrogen environment, adding an initiator, the preparation method comprises the following steps: carrying out random free radical polymerization reaction on thiazolinone methacrylate, methyl methacrylate, ethyl acrylate, triisopropyl silicon-based methacrylate and phenyl dimethyl silicon-based methacrylate by taking azodiisobutyronitrile and benzoyl peroxide as initiators to synthesize the photoinitiator. Wherein the thiazolinone methacrylate monomer is prepared by grafting double bonds on 5-chloro-2-benzothiazolinone and methacryloyl chloride through a substitution reaction, then grafting hydroxyl on the 5-chloro-2-benzothiazolinone and mercaptoethanol through a mercapto-alkene click reaction and finally carrying out a substitution reaction on the 5-chloro-2-benzothiazolinone and methacryloyl chloride. According to the invention, the coating still has good surface self-renewal capability even in a static environment so as to inhibit the adhesion of large fouling organisms.

The invention discloses unsaturated polyester resin for an unmanned aerial vehicle fuselage and a preparation method of the unsaturated polyester resin, and relates to the field of high polymer materials. When the unsaturated polyester resin for the unmanned aerial vehicle fuselage is prepared, a flame-retardant monomer reacts with 2-hydroxy-5-(hydroxymethyl) benzaldehyde to prepare a modified flame-retardant monomer; reacting cellulose with acrylic acid to obtain pre-modified cellulose; the pre-modified cellulose, 1-allyl-1, 1, 3, 3-tetramethyldisiloxane and chloroplatinic acid are subjected to a reaction, and modified cellulose is prepared; maleic anhydride, 5-(1H-imidazole-1-yl)-1, 3-phthalic acid, propylene glycol and the modified flame-retardant monomer are subjected to a reaction, and pre-polyester is prepared; and stirring the pre-polyester, zinc chloride, modified cellulose, benzophenone peroxide and styrene to obtain the anti-aging coating. The prepared unsaturated polyester resin for the unmanned aerial vehicle fuselage has good anti-aging, self-repairing, flame-retardant and self-cleaning performance.

The invention relates to the field of copper-clad plates, and discloses a low-dielectric-constant high-performance copper-clad plate and a preparation method thereof.The preparation method comprises the specific steps that epoxy resin, phenolic resin, polyphenyl ether modified resin, modified nano silicon dioxide and the like are taken and mixed to obtain a resin glue solution; impregnating glass fabric in the resin glue solution to obtain a prepreg; laminating prepregs, and covering copper foil for hot pressing; the polyphenyl ether modified resin comprises epoxy resin, diallyl cyanate and fluorine-containing polyphenyl ether resin prepared by reaction of polyphenyl ether, bisphenol AF and benzoyl peroxide; the modified nano silicon dioxide is prepared by reacting allyl glycidyl ether, vinyltriethoxysilane and phenyltris (dimethylsiloxane) silane, then grafting with a phosphorus-containing intermediate to prepare a modified additive, and grafting with nano silicon dioxide, and the phosphorus-containing intermediate is prepared by reacting phenylphosphoryl dichloride and eugenol. The copper-clad plate with high flame retardance, high peel strength, heat resistance and low dielectric constant is prepared.

The invention relates to a degradable acrylic pressure-sensitive adhesive and a preparation method thereof, and belongs to the technical field of acrylic pressure-sensitive adhesives. The degradable acrylic pressure-sensitive adhesive provided by the invention is prepared from the following raw materials: polylactic acid, butyl acrylate, 2-ethylhexyl acrylate, benzoyl peroxide, ethyl acetate, temperature-sensitive microcapsules, a tackifier, an antioxidant and a stabilizer. The degradable acrylic pressure-sensitive adhesive disclosed by the invention is prepared from a plurality of components, and the polylactic acid not only endows the pressure-sensitive adhesive with good biodegradability, but also provides proper mechanical strength and flexibility; butyl acrylate and 2-ethylhexyl acrylate are combined, so that the pressure-sensitive adhesive has excellent adhesion and weather resistance; due to the introduction of the temperature-sensitive microcapsules, the tackifier, the antioxidant and the stabilizer, the performance of the pressure-sensitive adhesive is further improved, and the degradability of the pressure-sensitive adhesive is improved.

The invention relates to the technical field of ABS (Acrylonitrile Butadiene Styrene) materials, in particular to an impact-resistant composite ABS plate and a preparation method thereof. The impact-resistant composite ABS plate is prepared from the following raw materials in parts by mass: 100 to 200 parts of emulsion ABS resin, 10 to 20 parts of butadiene monomer, 5 to 10 parts of methyl methacrylate, 1 to 5 parts of glycidyl acrylate, 1 to 5 parts of maleic anhydride, 5 to 15 parts of styrene, 1 to 5 parts of aminated silicon dioxide, 0.1 to 0.5 part of benzoyl peroxide, 0.1 to 0.3 part of triethylamine, 0.1 to 1 part of emulsifier and 0.01 to 0.1 part of first initiator, 0.05-0.2 part of a second initiator, 1-3 parts of oxidized polyethlene wax, 1-2 parts of a lubricant and 1-3 parts of an antioxidant. The invention solves the contradiction between the heat resistance and impact strength of the ABS resin, has obvious advantages compared with the traditional modification system, and completely meets the application requirements of the plate in a high-temperature vibration environment.

The invention discloses an insulating material composition, a high-voltage cable, a preparation method and application. The insulating material comprises polyethylene, a peroxide cross-linking agent and an antioxidant, wherein the peroxide cross-linking agent does not contain benzoyl peroxide, and the peroxide cross-linking agent meets one or two of the following characteristics: (i) the peroxide cross-linking agent contains a reactive functional group, and the reactive functional group is selected from at least one of alkenyl, alkynyl and azido; (ii) the peroxide crosslinking agent contains at least one of a peroxide carbonyl group and a peroxide carbonate group; when the peroxide cross-linking agent contains a peroxide carbonyl group, the peroxide cross-linking agent is a non-aromatic compound. The provided insulating material composition contains the peroxide cross-linking agent adopting a specific structure, the cross-linking efficiency is improved, the long-time extrusion stability is remarkably improved, and in the long-time extrusion process, the extrusion pressure is kept stable.

The invention relates to the technical field of regenerated polyethylene materials, and particularly discloses a high-flame-retardant regenerated polyethylene plastic and a preparation process thereof. Comprising the following steps: S1, taking maleic anhydride polyamidoamine, adding water and ethanol, uniformly stirring, adding 1-octene, a vinyl silane coupling agent and benzoyl peroxide, stirring for reaction, and removing a solvent to obtain a modifier; s2, adding carbon black into water and ethanol, uniformly stirring, heating, adding a modifier, and performing reflux reaction to obtain modified carbon black; s3, adding double-bond phosphate and sulfydryl modified benzene diboron into tetrahydrofuran, uniformly stirring, adding high-density polyethylene and a photoinitiator, mixing, carrying out ultraviolet irradiation, filtering, taking a solid, and drying, so as to obtain modified polyethylene; s4, taking regenerated high-density polyethylene, polypropylene, modified polyethylene, calcium stearate, modified carbon black, an antioxidant, a diisocyanate cross-linking agent, dicumyl peroxide and toner, uniformly stirring, and performing melt extrusion to obtain the high-flame-retardant regenerated polyethylene plastic.

The invention relates to the technical field of high polymer materials, and discloses a high-durability pressure-sensitive adhesive with low VOCs release and a preparation method thereof.The high-durability pressure-sensitive adhesive is prepared from, by weight, 50-80 parts of acrylate copolymer, 0.5-5 parts of cross-linking agent, 10-30 parts of tackifying resin, 1-10 parts of inorganic filler, 0.1-2 parts of antioxidant and 20-50 parts of solvent. Wherein the tackifying resin is at least one of hydrogenated petroleum resin and glycerol ester of rosin, and the inorganic filler is one of nanoscale silicon dioxide and calcium carbonate. Butyl acrylate is used as a main monomer, 2-ethylhexyl acrylate is used as a comonomer, acrylic acid is used as a functional monomer, benzoyl peroxide is used as an initiator, free radical polymerization is carried out at the temperature of 60-85 DEG C under the protection of nitrogen for 4-8 hours, and a copolymer chain with the molecular weight distribution index (PDI) smaller than or equal to 2.5 is formed, so that the viscosity and elasticity of colloid can be balanced; the peeling strength and the weather resistance are improved, and the colloid is prevented from being too soft or embrittled.

The invention discloses a macroporous resin material and a preparation method thereof, and macroporous resin with high specific surface area and excellent adsorption performance is obtained through a specific modified acrylate polymeric monomer and a preparation method of the macroporous resin material. The method comprises the following steps: reacting quercetin, methyl vanillate and acryloyl chloride to prepare a modified acrylate polymeric monomer, mixing the modified acrylate polymeric monomer with polyvinyl alcohol, ethylene glycol dimethacrylate, dodecanol, benzoyl peroxide and the like, and carrying out suspension polymerization to prepare the macroporous resin material. The prepared macroporous resin material has excellent performance in the aspects of pore structure, polarity and the like, can be widely applied to the related fields of adsorption separation and the like, and provides a new thought and method for research and development of the macroporous resin material.

The invention discloses a preparation method of ulinastatin adsorption resin, and belongs to the technical field of adsorption resin. Comprising the following steps: (1) preparing a water phase: adding pure water, gelatin, cellulose, sodium chloride and lignin into a reaction kettle until the materials are fully dissolved; (2) preparing an oil phase, wherein the oil phase contains divinylbenzene, methyl acrylate, benzoyl peroxide, tert-butyl peroxy-2-ethylhexanoate, triallyl isocyanurate, tripropanol alkyl trimethacrylate and methylbenzene, and the oil phase is uniformly stirred and mixed with the methylbenzene and the trivinylbenzene, the methyl acrylate, the benzoyl peroxide, the tert-butyl peroxy-2-ethylhexanoate, the triallyl isocyanurate, the tripropanol alkyl trimethacrylate and the methylbenzene; (3) suspension polymerization: putting the oil phase into the water phase, and carrying out staged heating reaction; (4) amination reaction; (5) alkylation reaction; and (6) acid-base alcohol treatment. Compared with the existing resin, the resin disclosed by the invention has the characteristics of high adsorption exchange rate, high desorption rate and high desorption concentration on ulinastatin, and the yield of ulinastatin is increased by 1.17 times compared with that of D215 resin.

The invention relates to the technical field of polypropylene plastics, and particularly discloses a preparation method of a high-toughness polypropylene plastic bucket, which comprises the following steps: dissolving benzoyl peroxide in toluene, adding an organic silicon prepolymer with double bonds at one end, and uniformly mixing to prepare a mixed solution; adding polypropylene K8003 and polypropylene Z30S into a high-speed mixer, adding the mixed solution, and mixing at 105-120 DEG C for 5-15 minutes to obtain a mixture; carrying out extrusion granulation on the mixture to obtain modified polypropylene; adding the obtained modified polypropylene, PP-g-MAH, a hydrogenated styrene-butadiene block copolymer, vinyl-terminated silicone oil, modified titanium dioxide and an antioxidant into a high-speed mixer for mixing, performing extrusion granulation, and finally performing injection molding to obtain the high-toughness polypropylene plastic bucket. The polypropylene plastic bucket is prepared by combining the polypropylene K8003, the polypropylene Z30S, the modified titanium dioxide, the antioxidant, the PP-g-MAH, the hydrogenated styrene-butadiene block copolymer and other components, and the components interact with one another, so that the toughness and the impact resistance of the polypropylene plastic bucket are improved.

The invention provides a preparation method of 1, 3-propane sultone, which comprises the following steps: introducing an allyl alcohol aqueous solution, a sodium hydroxide aqueous solution, sulfur dioxide and a slow-release peroxide into a continuous fluid reactor, reacting to obtain a 3-hydroxy propane sodium sulfonate crude product, acidifying the crude product to obtain 3-hydroxy propane sulfonic acid, concentrating to remove water, separating out salt by using methanol, and filtering to obtain 1, 3-propane sultone. And finally carrying out reduced pressure distillation on the filtrate to obtain 1, 3-PS. The slow-release peroxide is used for replacing conventional hydrogen peroxide or benzoyl peroxide to serve as an initiator, the preparation process conditions of the slow-release peroxide are controlled, calcium peroxide is embedded through stearic acid firstly, then surface modification polydopamine is subjected to secondary embedding, and the slow-release peroxide of a special structure is obtained; the selectivity of the 3-hydroxypropane sodium sulfonate is obviously improved while the reaction efficiency is not excessively influenced, and the method has industrial advantages.

The invention discloses an anti-radiation fabric and a preparation method thereof, and relates to the technical field of fabric preparation. When the anti-radiation fabric is prepared, bismuth powder is pre-modified with (3-chloropropyl) trimethoxysilane and then reacts with an anti-aging agent to prepare modified bismuth powder; the preparation method comprises the following steps: enabling 4-aminophenylethanol and 4-(2-ethoxyl) benzaldehyde to react to prepare a flame-retardant monomer, and then enabling the flame-retardant monomer to react with isophorone diisocyanate and 1, 4-butylene glycol to prepare polyurethane; the preparation method comprises the following steps: reacting dimethylallylamine with 1, 3-bis (chloromethyl)-1, 1, 3, 3-tetramethyldisiloxane to obtain an antibacterial cross-linking agent; the modified bismuth powder, N, N-dimethylformamide, polyurethane, an antibacterial cross-linking agent and benzoyl peroxide are mixed to prepare a polyurethane coating, the outer side surface of polyester base cloth is coated with the polyurethane coating, drying is conducted, and the anti-radiation coating fabric is prepared. The anti-radiation fabric prepared by the invention has good anti-radiation, anti-light aging, flame-retardant and antibacterial properties.

The invention relates to the technical field of polymer fibers, and in particular to an impact-resistant ultra-high molecular weight polyethylene fiber and a preparation method thereof. The invention introduces maleic anhydride for graft modification, and benzoyl peroxide as an initiator can promote the formation of free radicals, so that active sites are generated on the ultra-high molecular weight polyethylene chain. Maleic anhydride as a polar monomer can react with the active sites to form a graft chain, thereby introducing polar groups to enhance the interaction force between molecules, and improving the toughness and processing fluidity of the material to a certain extent. In addition, white oil, decalin and xylene as solvents are conducive to the expansion and dispersion of the ultra-high molecular weight polyethylene, so that the modification process is more uniform and efficient. The toughening polymer component in the invention is synthesized by chemical reaction to obtain a cross-linked network structure with multiple functional groups and a high molecular weight, so that the external impact force can be effectively absorbed and dispersed, and the impact resistance of the material can be significantly improved.

The invention discloses a degradation control agent, a refracturing controllable degradation plugging agent and a preparation method. The degradation control agent is an inclusion compound of cyclodextrin and benzoyl peroxide; the controllable degradation plugging agent for refracturing comprises the degradation control agent; the cyclodextrin molecule has an annular cavity structure, an internal cavity is non-polar, and benzoyl peroxide serving as an organic gel breaker can enter the cavity to form an inclusion compound; when a liquid rubber plug formed by the refracturing controllable degradation plugging agent is in a release medium, benzoyl peroxide molecules are released, inclusion balance is destroyed, deinclusion is carried out to carry out gel breaking degradation, and then the purpose of controllable degradation of the refracturing plugging agent is achieved by controlling the dosage of the degradation control agent.

The invention relates to the field of high-molecular materials, and provides a preparation method and application of a high-molecular degradable master batch, and the master batch is prepared from the following raw materials: maleic anhydride modified cellulose, modified starch, epoxy group-containing polymer modified polylactic acid, high-density polyethylene powder, a lubricant, a plasticizer, titanium dioxide particles and epoxidized soybean oil. The preparation method comprises the following steps: firstly, uniformly mixing a plurality of raw materials through a high-speed mixer, carrying out melt extrusion through an extruder, and then carrying out bracing, cooling, air drying, pelletizing, screening, drying and homogenizing to obtain the master batch. According to the master batch disclosed by the invention, the mechanical property, the processability, the thermal stability and the water resistance of the master batch are remarkably improved through the maleic anhydride modified cellulose, the benzoyl peroxide, the glycerol modified starch and the epoxy group-containing polymer modified polylactic acid, so that the comprehensive performance of the master batch is comprehensively optimized, and the master batch disclosed by the invention is excellent in comprehensive performance and has a wide application value.

The invention provides a PEF composite board and a preparation method, and relates to the technical field of insulation boards, the composite PEF board is formed by bonding a plurality of layers of board bodies, and comprises a base layer, the base layer is prepared from the following components in parts by weight: 58 to 60 parts of HDPE (High-Density Polyethylene), 4 to 6 parts of nano montmorillonite, 1 to 2 parts of benzoyl peroxide, 2 to 5 parts of BHT (Butylated Hydroxytoluene) heat stabilizer and antioxidant, 2 to 5 parts of maleic anhydride grafted polyethylene, 0.2 to 1 part of magnesium stearate and 0.3 to 0.8 part of epoxidized soybean oil; comprising a fireproof layer which is composed of the following components in parts by weight: 45-55 parts of HDPE and 5-15 parts of a phosphate ester environment-friendly flame retardant; comprising a thermal insulation layer and is prepared from the following components in parts by weight: 45-55 parts of HDPE, 5-10 parts of lignin fibers and 5-10 parts of a bio-based foaming agent formed by mixing sodium bicarbonate and citric acid. The invention has the beneficial effects that the mechanical strength, flame retardant property and thermal insulation effect of the PEF plate are obviously improved, the weather resistance and environmental protection property are enhanced, the optimal balance of high performance and cost effectiveness is realized, and the PEF plate is suitable for various building and industrial application environments.

The invention discloses a preparation method and application of a polymer lithium-conducting glue solution and a solid-state lithium battery, and the preparation method comprises the following steps: adding a lithium salt and a polymer monomer into a solvent according to a mass ratio of (5-10): (3-5) to form a mixed solution; adding an initiator, uniformly stirring to obtain a mixture glue solution, and carrying out heat treatment to obtain a polymer lithium-conducting glue solution; the initiator is selected from one or a mixture of two or more of azodiisobutyronitrile, benzoyl peroxide, potassium persulfate and ammonium persulfate in any proportion; the interface material which is formed in situ in the battery and has excellent mechanical property and lithium conducting capacity is used for reducing the operation pressure of the solid-state battery and improving the electrochemical performance of the solid-state battery.

The invention discloses a graphene modified epoxy resin-based packaging material and a preparation method thereof, and belongs to the technical field of preparation of epoxy molding compounds in electronic packaging. The preparation method comprises the following steps: mixing and dispersing a modified epoxy resin material, a curing agent, a curing accelerator, benzoyl peroxide and a modified heat-conducting filler according to a weight part ratio of (20-30): (16-19): (1-2): (0.4-0.6): (25-28) to form a dispersed material, pouring the dispersed material into a mold coated with a mold release agent, carrying out vacuum defoaming treatment at 45 DEG C for 30-35 minutes, and cooling to room temperature. And sequentially curing at 110 DEG C for 1-2 hours and curing at 130 DEG C for 2-3 hours to obtain the epoxy resin-based packaging material. The epoxy resin-based packaging material obtained by modifying the epoxy resin and the heat-conducting filler and then curing the epoxy resin and the heat-conducting filler has good heat-conducting property, impact resistance and insulating property.

The invention provides a drilling fluid flow pattern regulator suitable for Antarctic subglacial drilling and a preparation method and application thereof, and belongs to the technical field of polar region drilling. The flow pattern regulator is prepared from the following raw materials: 4-tert-butyl styrene, carboxylic acid, an acrylate monomer, oleyl alcohol, concentrated sulfuric acid and an initiator. The carboxylic acid is one of ricinoleic acid or phthalic acid; the acrylic ester monomer is one of acrylic acid-2-hydroxyethyl ester or 2-acrylic acid-2-hydroxy-3-phenoxy propyl ester, and the acrylic ester monomer is one of acrylic acid-2-hydroxyethyl ester and 2-acrylic acid-2-hydroxy-3-phenoxy propyl ester; and the initiator is one of azodiisobutyronitrile or benzoyl peroxide. The flow pattern regulator is simple in raw material composition and preparation method and low in cost. The flow pattern regulator can effectively improve the ultralow-temperature rheological property of the drilling fluid, enables the drilling fluid to have the advantages of low viscosity, high dynamic shearing force, chip carrying (ice chips and rock chips), excellent suspension performance and the like at the ultralow temperature, and is suitable for under-ice drilling in the Antarctic pole.

The present invention relates to the field of copper clad laminates, and discloses a copper clad laminate with low dielectric constant and high performance and a preparation method thereof. The specific steps are as follows: taking epoxy resin, phenolic resin, polyphenylene ether modified resin, modified nano-silica, etc. and mixing them to obtain a resin glue solution; impregnating glass fiber cloth in the resin glue solution to obtain a prepreg; taking the prepregs and laminating them and hot pressing them with copper foil; the polyphenylene ether modified resin includes epoxy resin, diallyl cyanate, and a fluorinated polyphenylene ether resin prepared by reacting polyphenylene ether, bisphenol AF, and benzoyl peroxide; the modified nano-silica is prepared by reacting allyl glycidyl ether and vinyltriethoxysilane with phenyltris(dimethylsilyl)silane, and then grafting it with a phosphorus-containing intermediate to form a modified additive, and grafting the modified additive with nano-silica. The phosphorus-containing intermediate is prepared by reacting phenylphosphoryl dichloride and eugenol. A copper clad laminate with high flame retardancy, high peel strength, and heat-resistant low dielectric constant is prepared.

The invention relates to the technical field of anti-aging agents, and discloses a preparation method of an anti-aging agent and application of the anti-aging agent in plastics, the anti-aging agent contains styrene groups, and can be well fused and grafted with polyolefin such as polypropylene under the action of an initiator dibenzoyl peroxide or dicumyl peroxide, so that the anti-aging agent has a good anti-aging effect. The influence on the mechanical strength of the polyolefin plastic is very small, and the problem that physical blending can cause great influence on the mechanical strength and the use performance of the plastic can be avoided. Meanwhile, a phenol triazine structure contained in the anti-aging agent has a unique ultraviolet absorption effect, and a hindered amine structure is contained, so that the photo-oxygen degradation reaction of the polyolefin plastic can be inhibited through multiple ways of capturing free radicals and decomposing hydroperoxide, and through an accelerated aging experiment of xenon lamp irradiation, the plastic keeps very high tensile strength, and the anti-aging effect is good. And excellent thermo-oxidative aging resistance and ultraviolet radiation aging resistance are shown.

The invention provides a heat-conducting water-blocking sealant, a preparation method thereof and a photovoltaic module. The heat-conducting and water-blocking sealant is prepared from the following raw materials in parts by mass: 50 to 100 parts of methyl vinyl siloxane, 50 to 100 parts of lignin, 10 to 50 parts of diamond particles and / or diamond alloy particles, 0.5 to 10 parts of a first cross-linking agent, 0.5 to 10 parts of a second cross-linking agent, 0.5 to 5 parts of a coupling agent and 0.05 to 1 part of a catalyst, wherein the first cross-linking agent is prepared from one or more of dicumyl peroxide, benzoyl peroxide, toluene diisocynate and hexamethylene diisocyanate; the second cross-linking agent comprises polymethylhydrosiloxane. The heat-conducting and water-blocking sealant disclosed by the invention has relatively good heat-conducting property, water-blocking property and electrical insulation property.

The invention relates to the technical field of soft robot polymers, in particular to a preparation method of a temperature stimulation deformation reversible response soft robot polymer. Comprising the following steps: firstly, carrying out solution blending polymerization on linear semi-crystalline high-molecular polyethylene vinyl acetate and a peroxide initiator benzoyl peroxide to serve as a soft robot polymer matrix; a particle leaching method is used for making pores in a polymer semi-crystalline system, and the particle size parameter of a pore-foaming agent is adjusted to design the structural characteristics and pore morphology of a three-dimensional pore channel; finally, the linear molecules are subjected to mutual bonding bridging reaction to form the soft robot polymer with an entangled network cross-linked network and crystallization network structure. The soft polymer is prepared by constructing, regulating and controlling the three-dimensional porous structure, and the complex pore stress distribution of the porous structure aims at realizing high driving strain, so that the driving strain of the deformable soft intelligent porous driving material is regulated and improved, and adjustable driving performance and driving multifunctionalization are realized.

The invention provides benzoyl peroxide gel and a preparation method thereof. The preparation method comprises the following steps: S1, preparing an active phase; s2, preparing a gel phase; s3, mixing half of the active phase with the gel phase, and performing constant-temperature water bath to obtain low-crosslinking-degree gel; s4, uniformly granulating the low-crosslinking-degree gel, mixing the low-crosslinking-degree gel with the balance of the active phase, and performing vacuum negative-pressure stirring twice to obtain a material; and S5, adding a pH regulator into the material, regulating the pH value, discharging and filling. Nanocrystals are formed through benzoyl peroxide pretreatment, the surface area and activity are improved, the curative effect is enhanced on the premise of safety, uniform dispersion can be achieved, the stability of benzoyl peroxide in gel is improved, and the storage time is prolonged. A part of the active phase and the gel phase are mixed to form low-crosslinking-degree gel, the low-crosslinking-degree gel is uniformly granulated and then mixed with the remaining active phase, and the benzoyl peroxide gel is prepared through vacuum negative pressure, so that the swelling property can be improved, the stability and the permeability can be improved, and adverse reactions such as irritation to skin can be avoided.

The invention relates to the technical field of light flexible drivers and intelligent macromolecules, in particular to a preparation method of a polymer driver for improving bidirectional shape memory driving performance, which comprises the following steps: 1) preparing a polyethylene vinyl acetate-sodium chloride particle-xylene-benzoyl peroxide mixed solution by a solution polymerization method; 2) preparing a polyethylene vinyl acetate-sodium chloride particle-benzoyl peroxide composite material; (3) peroxide thermally initiates a cross-linking reaction between free radicals and a macromolecular main chain; and 4) preparing the bidirectional shape memory porous polymer soft body driver with different driving devices.The bidirectional shape memory porous polymer soft body driver has the advantages that the self-driven reciprocating deformation, large driving deformation and complex shape change of the polymer are realized on the basis of semi-crystalline polymer thermal coupling through the change of a cross-linked network interspersed in a crystal interval, and the bidirectional reversible driving performance is further improved.

The invention provides a preparation method of high-impact MBS (methyl methacrylate-butadiene-styrene) resin with a gradient shell structure, which comprises the following steps: adding a butadiene / styrene core, methyl methacrylate, styrene and a proper amount of solvent into a reactor, uniformly mixing, heating to 110-130 DEG C, adding 20-40% of composite initiator, and carrying out polymerization reaction for 0.5-2 hours; cooling to 85-95 DEG C, adding 20-40% of a composite initiator, and continuously reacting for 0.5-2 hours; cooling to 60-70 DEG C, adding the residual composite initiator, and continuously reacting for 2-5 hours; and after the reaction is finished, carrying out post-treatment on the product to obtain the high-impact MBS resin. The composite initiator is composed of azodiisobutyronitrile and benzoyl peroxide, and the benzoyl peroxide accounts for 20-40% of the total amount of the composite initiator. The MBS resin with the gradient shell structure is prepared by adopting a step-by-step polymerization method and controlling the initiation rate, the bottleneck problem of toughness contradiction of the MBS resin with the core-shell structure is solved, and the MBS resin with high light transmittance and super toughness is obtained.

The invention relates to the technical field of lithium batteries, and particularly discloses a preparation method of a positive electrode material for improving the capacity and cycle performance of a lithium battery. Comprising the following operation steps: grinding and mixing NCM, gallium trichloride and polyvinylidene fluoride, calcining in a nitrogen atmosphere to obtain modified NCM, and taking the modified NCM as an active material; the preparation method comprises the following steps: sequentially adding a conductive agent and a vinyl silane coupling agent into 20-30wt% of an ethanol aqueous solution, stirring at 50-60 DEG C for 1-2 hours, and freeze-drying to obtain a vinyl conductive agent; the preparation method comprises the following steps: sequentially adding a vinyl conductive agent, 3-vinyl phenylboronic acid, 4-vinylaniline, N-vinyl pyrrolidone, 1, 3-divinyl-2-imidazolinone and benzoyl peroxide into deionized water, carrying out an oil bath stirring reaction in a nitrogen atmosphere, washing, drying, grinding and sieving to obtain a modified conductive agent; and uniformly mixing the active material, the binder and the conductive agent to obtain the positive electrode material.