414 results about "Dicumyl peroxide" patented technology

The invention belongs to the technical field of flame retardants, and particularly relates to a high-thermal-stability polyphosphate flame retardant and a preparation method thereof. The DOPO is modified through the polyethylene glycol acrylate, methyl methacrylate and dicumyl peroxide composite solution, double bonds of the polyethylene glycol acrylate and P-H bonds of the DOPO can be subjected to nucleophilic addition to form stable C-P bonds, and thermal migration of the DOPO is hindered; dOPO has polymerization double bonds of methyl methacrylate and long carbon chains of polyethylene glycol acrylate, so that the compatibility of the polyphosphate flame retardant and a polymer substrate is improved, and phase separation is avoided; maleic anhydride grafted silicone oil is connected to the surface of an amino modified gamma-cyclodextrin-modified DOPO inclusion compound, so that the polyphosphate flame retardant has high thermal stability and high compatibility after long-chain alkyl modification; amino groups in the modified gamma-cyclodextrin react with maleic anhydride grafted silicone oil to generate an amido bond cross-linked network, so that the thermal migration of DOPO is reduced together, and the high thermal stability of the polyphosphate flame retardant is improved.

Provided are a water-resistant wood-plastic reinforced composite flooring and a manufacturing method therefor. Wood flour is boiled in boiling water for 3-4 hours, filtered and dried, to obtain dried wood flour; polypropylene, butyl acrylate, methyl methacrylate, maleic anhydride and dicumyl peroxide are mixed evenly, extruded and granulated, and dried to obtain a compatibilizer; the dried wood flour and polypropylene are mixed evenly, the compatibilizer is added and mixed evenly, then extrusion and granulation, and injection molded, are performed, to obtain a wood-plastic flooring blank; a composite resin emulsion and a photoinitiator are ultrasonically mixed evenly, and the wood-plastic flooring blank is immersed therein, then taken out and dried at room temperature, and then vacuum dried and UV cured, to obtain water-resistant wood-plastic reinforced composite flooring.

The invention provides a low-smoke halogen-free flame-retardant cable material and a preparation method thereof, and belongs to the field of cable materials. The low-smoke halogen-free flame-retardant cable material is prepared from the following chemical components: 32 to 40 parts of nitrile rubber, 22 to 27 parts of natural rubber, 8 to 12 parts of benzoxazole-siloxane copolymer containing phosphate dynamic bonds, 13 to 15 parts of core-shell-sheath three-stage structure flame retardant, 4 to 6 parts of hexaphenoxy cyclotriphosphazene modified carbon nanotubes, 2 to 3 parts of europium-doped mesoporous cerium dioxide and 3 to 4 parts of nano zinc oxide. The composite material is prepared from the following components in parts by weight: 3 to 4 parts of carbon nanotube grafted montmorillonite hybrid, 2 to 3 parts of lubricant, 0.8 to 1.2 parts of cross-linking agent, 0.3 to 0.4 part of accelerant, 0.4 to 0.6 part of dicumyl peroxide and 0.1 to 0.2 part of antioxidant. Unification of high flame retardance, low smoke, excellent mechanical property and processability of the cable material is realized.

The invention discloses a flexible fireproof cable and a preparation method thereof, and belongs to the technical field of cables. The cable comprises a conductor, a mica insulation layer, a copper protection layer, a buffer layer and a cable sheath layer. The buffer layer is made of a polyurethane foaming material; the cable sheath layer is prepared from the following components in parts by weight: 80 to 100 parts of methyl vinyl silicone rubber, 18 to 20 parts of modified carbon black, 5 to 8 parts of titanium dioxide, 1 to 2 parts of platinum catalyst, 3 to 6 parts of hydroxyl silicone oil, 0.5 to 1 part of zinc stearate and 0.8 to 1 part of dicumyl peroxide. The modified carbon black is added into the raw materials of the sheath layer, so that the compatibility, the interface bonding force and the flame retardant property of the carbon black and a silicone rubber matrix are effectively improved, and the mechanical property, the wear resistance and the fireproof property of the cable sheath layer are remarkably enhanced.

The invention relates to the technical field of cables, and provides a high-temperature-resistant flame-retardant power cable and a preparation method thereof. A high-temperature-resistant flame-retardant power cable comprises a conductor and a high-temperature-resistant flame-retardant outer layer wrapping the conductor. The high-temperature-resistant flame-retardant outer layer is prepared from the following raw materials in parts by weight: linear low-density polyethylene, an ethylene-vinyl acetate copolymer, ethylene propylene diene monomer, chopped polyimide fibers, nano-coated magnesium hydroxide, zinc borate, zinc stannate, polyethylene grafted maleic anhydride, an anti-aging agent, dicumyl peroxide, an antioxidant, polyethylene wax, calcium stearate and cerium dioxide. According to the cable prepared in the invention, the reliability of an existing high-temperature-resistant flame-retardant power cable under thermal cycle is improved, and the problem of local temperature resistance difference caused by agglomeration and high-temperature migration of nanoparticles in a polymer matrix is improved.

The invention discloses a sheath material for a saline-alkaline-resistant dragging cable, a preparation method of the sheath material, the cable and the sheath material. The sheath material is prepared from the following raw materials in parts by weight: 40 to 45 parts of chlorinated polyethylene, 1.5 to 2.0 parts of dicumyl peroxide vulcanizing agent, 2 to 2.5 parts of triisocyanate vulcanizing agent, 0.1 to 0.3 part of ethylene thiourea accelerant, 0.05 to 0.15 part of anti-aging agent RD, 4 to 5 parts of metal oxide, 1 to 1.5 parts of paraffin, 8 to 10 parts of calcium carbonate, 15 to 21 parts of reinforcing agent, 1 to 1.5 parts of lead stearate, 0.5 to 1 part of lead sulfate tribasic, 1 to 1.5 parts of ultraviolet light absorber, 3 to 5 parts of epoxidized soybean oil and 8 to 8 parts of chlorinated paraffin. 9 parts of antimony trioxide and 3-4 parts of antimony trioxide. The cable has the advantages of ultraviolet resistance, no salt deposition, water resistance, tensile resistance, cold resistance and the like, can be used for a long time in a special operating environment, has the service life of at least more than 3 years, and avoids frequent replacement of the cable by a user.

The invention relates to the technical field of crosslinked polyethylene insulated power cables, in particular to a flame-retardant and insulated low-voltage power cable and a preparation method and application thereof. The flame-retardant and insulating low-voltage power cable comprises the inner core layer, the filler layer, the belting layer, the lining layer, the metal armor layer and the outer sheath layer from inside to outside, and the multiple layers can effectively protect the inner core and endow the cable with better performance; in addition, low-density polyethylene, a furan modified polyethylene compatilizer, a reactive flame retardant, bismaleimide, dicumyl peroxide and an auxiliary are adopted to obtain the cross-linked polyethylene material for the cable outer sheath, and the cross-linked polyethylene material has excellent insulation, flame retardance, strength, toughness and repairing performance.

The invention relates to the technical field of cable materials, in particular to a flame-retardant efficient cross-linked polyolefin cable body and a preparation method thereof. The cable body comprises a polyolefin matrix, 2, 4-dihydroxy-6-methyl benzamide, an intumescent flame retardant, dicumyl peroxide, an antioxidant, a light stabilizer and a lubricant, wherein the polyolefin matrix is subjected to synergistic modification by phosphorus-nitrogen heterocyclic silane-plasma. The preparation method of the polyolefin matrix synergistically modified by phosphorus-nitrogen heterocyclic silane-plasma comprises the following steps: performing grafting reaction on polyolefin resin and phosphorus-nitrogen heterocyclic silane under the action of an initiator, and performing plasma surface treatment to endow the material with dual active sites. The preparation method comprises the following steps: melting and granulating a polyolefin matrix subjected to phosphorus-nitrogen heterocyclic silane-plasma synergistic modification, small organic molecules and auxiliaries, and performing extrusion molding under a crosslinking condition to obtain a cable body. The material disclosed by the invention has comprehensive advantages in flame-retardant efficiency, crosslinking degree and mechanical property, and is suitable for manufacturing high-safety power cables.

The invention discloses a low-creep PP composite material for a buckle and a preparation method of the low-creep PP composite material, the composite material is prepared from the following raw materials in parts by weight: 100-120 parts of PP master batch, 5-10 parts of modified additive, 5-8 parts of modified carbon nano tube, 0.5-0.8 part of dicumyl peroxide and 0.1-0.3 part of tetraisopropyl titanate, when the PP master batch, the modified additive and the dicumyl peroxide are melted and blended, the low-creep PP composite material is prepared from the following raw materials in parts by weight: 100-120 parts of PP master batch, 5-10 parts of modified additive, 5-8 parts of modified carbon nano tube, 0.5-0.8 part of dicumyl peroxide and 0.1-0.3 part of tetraisopropyl titanate. Polypropylene molecular chains can be recombined with unsaturated double bonds on modified additive molecules to form a cross-linked grid structure, so that slippage of the molecular chains is reduced, and the modified additive molecules contain benzene ring structures, so that rigidity can be increased, and creep resistance of the composite material is improved; the modified carbon nanotubes and tetraisopropyl titanate are added for continuous melt blending, aldehyde groups on the modified carbon nanotubes can react with amino groups on side chains of the modified additives to form imine bonds, then a reversible cross-linked network of the imine bonds is formed in the composite material, and the impact resistance is improved.

The invention relates to a preparation method of an epoxy and DCP bi-crosslinked EAA and LDPE cable material, and belongs to the technical field of preparation of high-voltage direct-current cable materials. The preparation method of the cable material comprises the following steps: taking an ethylene acrylic acid copolymer EAA and low-density polyethylene LDPE as matrix resin, taking a biphenyl type micromolecular epoxy compound 4, 4 '-biphenol diglycidyl ether and dicumyl peroxide DCP as double crosslinking agents, and carrying out cross-linking reaction to prepare the cable material. And heating and pressurizing in a press vulcanizer to obtain the biphenyl micromolecular epoxy and DCP bi-crosslinked EAA / LDPE high-voltage direct-current cable material. A bi-crosslinking structure formed by biphenyl type micromolecule epoxy and DCP bi-crosslinking EAA / LDPE material and an in-situ introduced voltage stabilizing segment effectively improve the direct current resistance of the cable material. The high-voltage direct-current cable material prepared by the method is simple in preparation process and low in cost, and has excellent mechanical properties and electrical properties.

The invention provides a preparation method of a novel cable sheath layer. The novel cable sheath layer comprises silicone rubber, a heat-conducting insulating material, a flame-retardant material, white carbon black, a silane coupling agent, dicumyl peroxide, silicone oil, an antioxidant, a light stabilizer and the like. The preparation method comprises the following steps: firstly, modifying a heat-conducting insulating material and a flame-retardant material to improve the dispersity and interfacial compatibility, and then uniformly dispersing filler in a silicone rubber matrix through banburying, open milling and vulcanization processes to finally form a high-performance cable sheath layer. Nanometer spherical aluminum oxide grafted hexagonal boron nitride is used as a heat-conducting insulating material, so that the heat conductivity of the sheath layer is remarkably improved, and excellent electrical insulation performance is kept. Besides, modified magnesium-rich silicate is used as a flame-retardant material, so that the cable has an excellent flame-retardant effect, and an antioxidant and a light stabilizer are combined, so that the weather resistance and the aging resistance of the sheath layer are improved. The prepared cable sheath layer is suitable for the fields of high-voltage cables, 5G communication, power transmission, aerospace, military use, rail transit and the like, and has a good application prospect.

The invention discloses a wear-resistant composite rubber packing sealing material for an oil pumping unit and a preparation method, and the sealing material is prepared from the following raw materials in parts by weight: a main body rubber material, which comprises 70-90 parts by weight of nitrile rubber and 10-30 parts by weight of polyurethane rubber, based on the total weight of 100 parts; 3-5 parts of zinc oxide; 2-3 parts of stearic acid; 30 to 60 parts of carbon black; 5 to 15 parts of graphite; 20-40 parts of an inorganic nano wear-resistant filler; 3-6 parts of an active agent; 5-10 parts of a softening agent; 2-3 parts of an anti-aging agent; 2-6 parts of an effective vulcanization cross-linking agent and 2-5 parts of a peroxide cross-linking agent; wherein the effective vulcanization cross-linking agent is a mixture of an accelerant and sulfur, and the peroxide cross-linking agent is dicumyl peroxide. According to the wear-resistant composite rubber packing sealing material for the oil pumping unit provided by the invention, by balancing the tensile strength, tearing strength, oil resistance and wear resistance of the material, the comprehensive performance of the material is remarkably improved, and the service life of the material is prolonged.

The invention relates to the technical field of cables, in particular to fire-resistant silicone rubber, a preparation method thereof and a cable, and the fire-resistant silicone rubber is composed of a matrix resin composite system, a composite flame-retardant system, a nanometer enhancement and smoke suppression system and an interface and vulcanization system, the matrix resin composite system comprises methyl vinyl silicone rubber, vinyl silicone rubber and macromolecular polyethylene, the composite flame-retardant system comprises nano aluminum hydroxide, zinc borate and transition metal nitride, and the nano enhancement and smoke suppression system comprises modified nano silicon dioxide, organic montmorillonite and zinc molybdate. The interface and vulcanization system comprises a silane coupling agent, dicumyl peroxide and a platinum catalyst. Therefore, the problems that in the prior art, fire resistance is insufficient, toxic gas is released during combustion, the mechanical property is poor, machining is complex, and environment friendliness is low are solved.

The invention discloses a flame-retardant flat flexible high-current cable and a preparation method thereof, and relates to the technical field of cables. The cable comprises a flat conductor, an insulating layer, a shielding layer, a reinforcing layer and a sheath layer, the insulating layer contains 85-90 parts of low-density polyethylene, 1.2-1.5 parts of dicumyl peroxide, 12-15 parts of modified aluminum hydroxide and the like; and the sheath layer contains 42-50 parts of modified chlorinated polyethylene, 28-34 parts of modified aluminum hydroxide and the like. The modified chlorinated polyethylene is prepared through a three-step extrusion reaction, and the modified aluminum hydroxide is subjected to coupling agent treatment, coating modification and carbon nanotube composite modification. The flame-retardant flat flexible large-current cable has prominent advantages, an efficient flame-retardant system is constructed by modified aluminum hydroxide and antimony trioxide, and the V-0 level requirement of UL94 can be met; the flat structure is combined with the modified chlorinated polyethylene, so that the flexibility is excellent and the temperature-resistant range is wide. The design of the insulating layer and the shielding layer ensures excellent electrical performance, segmented temperature control and accurate parameter regulation and control are performed in preparation, stable product quality is ensured, and the device can adapt to a large-current application scene.

The invention relates to the technical field of cables, in particular to a high-flexibility ethylene-propylene insulating rubber material for a charging pile cable and a preparation process. The composite material comprises an ethylene propylene diene monomer, a thermoplastic polyolefin elastomer, an ethylene-butylene copolymer, nanoscale magnesium hydroxide, a silane coupling agent, dicumyl peroxide, a hindered phenol antioxidant and a phosphite antioxidant. The ethylene propylene diene monomer and the ethylene-butylene copolymer form a flexible network skeleton, and the ethylene-butylene copolymer and the thermoplastic polyolefin elastomer are subjected to molecular-level blending, so that the elongation at break and the bending fatigue resistance are improved; silane coupling agent modified nano magnesium hydroxide is chemically bonded with a rubber matrix, so that the flame retardance and thermal aging resistance are enhanced, and the negative influence of filler agglomeration on flexibility is reduced; the compound antioxidant system effectively inhibits thermal oxidation degradation at high temperature, avoids insulation failure, realizes collaborative optimization of high flexibility and high heat resistance, and improves the reliability and applicability of the charging pile cable.

The invention relates to the technical field of cables, and provides a corrosion-resistant insulated power cable. The corrosion-resistant insulated power cable is sequentially provided with a conductor layer, an insulating layer and a sheath layer from inside to outside, and the insulating layer is prepared from the following raw materials in parts by weight: low-density polyethylene, magnesium hydroxide and calcium carbonate composite powder, an antioxidant, dicumyl peroxide, zinc stearate and polyethylene wax; the sheath layer comprises the following raw materials in parts by weight: PVC resin, magnesium hydroxide and calcium carbonate composite powder, diisononyl phthalate, a calcium-zinc composite stabilizer, an antioxidant, polyethylene wax and calcium stearate. According to the corrosion-resistant insulated power cable prepared in the invention, the corrosion resistance of the power cable in extreme corrosion environments such as strong acid, strong alkali, high-concentration salt mist and the like is improved, and the condition that a common cable sheath is easy to expand and crack in the extreme corrosion environments is improved.

The invention relates to the technical field of high polymer material modification, and discloses a polypropylene modified material prepared based on a grafting blending method and a preparation process thereof, and the polypropylene modified material comprises the following materials in parts by weight: 100 parts of polypropylene used as a base resin and with the selected model of PP-H-1250; maleic anhydride is selected as a grafting monomer, and the use amount is 2-5 parts; the initiator comprises dicumyl peroxide, di-tert-butyl peroxide and tert-butylperoxy, and the total amount of the initiator and the di-tert-butyl peroxide is 0.61-1.25 parts. According to the polypropylene modified material prepared based on the grafting blending method and the preparation process thereof, by accurately controlling the raw material ratio and then adopting the grafting blending method, the polarity of polypropylene is effectively improved, so that the polypropylene can be better bonded with a polar material and blended with an inorganic material and a polar polymer, the application range is widened, the melt strength of the polypropylene is improved, and the mechanical property of the polypropylene is improved. The processing properties of foaming, extrusion molding, blow molding and the like of the material are improved, and the properties of the polyethylene material are further obviously improved.

The invention provides a bacteriostatic and scale-inhibiting PE material and a preparation method thereof, and belongs to the technical field of high polymer materials, the preparation method comprises the following preparation steps: dissolving polyethylene in xylene, dissolving, adding perfluorohexylethylene and dicumyl peroxide, reacting, precipitating, washing, and drying to obtain perfluoro modified PE; the preparation method comprises the following steps: dissolving four-arm polyethylene glycol amine in a PBS buffer solution, adding 4-carboxyphenylboronic acid, EDC.HCl and NHS, carrying out a stirring reaction in a dark place, carrying out ultrafiltration and freeze drying to obtain PBA-PEG, dissolving the PBA-PEG in a Tris-HCl buffer solution, adding dopamine hydrochloride, and carrying out mixing, oxidation reaction, dialysis purification and drying to obtain a PBA-DA-PEG compound; the preparation method comprises the following steps: pre-mixing perfluorinated modified PE, mixing with an antioxidant and a compatibilizer, injecting the PBA-DA-PEG compound, continuously mixing, extruding, and carrying out water-cooling pelletizing to obtain the antibacterial and scale-inhibiting PE material. According to the PE material obtained by the invention, the antibacterial performance and the scale inhibition performance of the material can be improved at the same time.

The invention discloses a bio-based TPV composite material and a preparation method thereof, and belongs to the technical field of preparation of TPV composite materials, polylactic acid is used as a plastic phase, bio-based itaconate rubber and a bio-based ethylene-vinyl acetate copolymer are used as a rubber phase, maleic anhydride grafted cardanol and an ethylene-acrylic acid copolymer are used as a composite compatibilizer, and the bio-based TPV composite material is prepared. Titanate coupling agent modified core-shell particles are added to serve as a reinforcing agent, dicumyl peroxide is combined with an electron beam radiation initiation mode, and the bio-based PLA / Bio-ItBR / EVA TPV is prepared through a dynamic vulcanization process. The product has medium hardness, medium tensile strength, excellent ductility and high elasticity, and good elastic memory ability and compressive deformation resistance. The compatibility between a plastic phase and a rubber phase is improved, and the phase separation problem caused by polarity difference is reduced. The dicumyl peroxide is combined with a dynamic vulcanization process initiated by electron beam radiation, so that a uniform cross-linked network can be formed, and the stability of the material performance is improved.

The invention relates to the technical field of cables, and provides a high-temperature-resistant power cable. The high-temperature-resistant power cable comprises a conductor and a high-temperature-resistant outer sheath, the high-temperature-resistant outer sheath is prepared from the following raw materials in parts by weight: 80 to 90 parts of linear low-density polyethylene, 10 to 15 parts of ethylene-vinyl acetate copolymer, 20 to 25 parts of polyurethane grafted aluminum borate whisker, 12 to 15 parts of polyolefin elastomer, 0.5 to 1 part of antioxidant, 0.8 to 1 part of dicumyl peroxide, 1.0 to 1.2 parts of crosslinking aid TAIC, 0.3 to 0.8 part of stabilizer, 0.5 to 1 part of calcium stearate and 0.2 to 0.5 part of polyethylene wax. According to the cable prepared in the invention, the stability of the interlayer structure of the high-temperature-resistant power cable during long-term high-temperature operation is improved, and the anti-degradation performance of the material of the high-temperature-resistant power cable in a long-term high-temperature environment is improved.

The invention relates to the technical field of cables, and provides a high-weather-resistance power cable. The high-weather-resistant power cable comprises a cable core and an outer sheath, the outer sheath is prepared from the following raw materials in parts by weight: 40 to 50 parts of low-density polyethylene, 25 to 35 parts of ethylene-vinyl acetate copolymer, 20 to 30 parts of ethylene propylene diene monomer, 10 to 12 parts of maleic anhydride grafted ethylene-vinyl acetate copolymer, 16 to 20 parts of ZrO2 coated modified hydrotalcite, 15 to 20 parts of magnesium hydroxide, 4 to 6 parts of silane coupling agent, 2 to 3 parts of dicumyl peroxide and 3 to 5 parts of zinc oxide; 6 to 10 parts of conductive carbon black, 0.8 to 1 part of antioxidant and 1 to 1.5 parts of zinc stearate. According to the cable prepared in the invention, the protection performance, the service life and the safety of an existing high-weather-resistance power cable under extreme weather conditions are improved, and the mechanical property of the cable is also improved.

The invention discloses a high-elastic material for an anti-slip sole and a preparation method of the high-elastic material in the field of high polymer materials. The high-elastic material is prepared from the following raw materials: modified polyurethane, modified silicone rubber, calcium carbonate, dicumyl peroxide, 2-mercaptobenzothiazole, N-isopropyl-N '-phenyl p-phenylenediamine and naphthenic oil. Wherein the modified polyurethane is prepared by the following steps: carrying out vacuum dehydration on polybutylene adipate, reacting with toluene diisocynate to prepare an isocyanate-terminated prepolymer, adding dimethylolpropionic acid, triethylamine and deionized water to obtain a water-based dispersion, and carrying out graft copolymerization on the water-based dispersion, methyl methacrylate and the like; the preparation method comprises the following steps: preheating modified polyurethane, mixing with modified silicone rubber at a high speed, adding calcium carbonate and naphthenic oil, carrying out double-roller open milling and thin-passing, adding a vulcanizing agent and the like, carrying out overturning milling, and carrying out flat plate vulcanization molding. The material is used for anti-skid soles, and has the advantages of high elasticity, lasting skid resistance and excellent weather resistance.

The invention discloses a method for manufacturing a polyamide-imide high-heat-resistance enameled wire for a new energy automobile, and the method comprises the following steps: 1), carrying out the surface treatment of a conductor, and improving the surface roughness; 2) preparing insulating paint liquid; (3) coating the insulating paint liquid obtained in the step (2) on the surface of the conductor obtained in the step (1) for multiple times; and 4) carrying out sectional stretching treatment to finally obtain the polyamide-imide high-heat-resistance enameled wire. The polyamide-imide resin, the solvent, the epoxy modifier, the nano composite powder, the silane coupling agent and the dicumyl peroxide are compounded to prepare the insulating paint liquid, and the insulating paint liquid is coated on the conductor for multiple times, so that a compact layer can be formed on the conductor, and the insulating paint liquid has the advantages of high heat resistance, high thermal stability, high mechanical property and the like; the extreme requirements of the new energy automobile driving motor on high temperature resistance, high-frequency pulse voltage resistance and refrigerant corrosion resistance of the enameled wire are met, the manufacturing steps are simple, and the enameled wire is suitable for industrial popularization and application.

The invention discloses a high-temperature-resistant poly (4-methyl-1-pentene) dielectric film with synergistically improved insulating strength and dielectric property and a preparation method and application thereof, and belongs to the field of preparation processes of polymer energy storage dielectric materials. The invention aims to solve the problems that the existing polymer energy storage material is low in energy storage density at high temperature, and the dielectric property and the insulating strength cannot be improved at the same time. The invention provides a method for preparing a norbornene dianhydride grafted poly (4-methyl-1-pentene) film by a two-step method by using poly (4-methyl-1-pentene) particles, norbornene dianhydride and dicumyl peroxide and combining a solution suspension technology with a melt casting extrusion technology and a one-way stretching traction technology. The high-temperature-resistant poly (4-methyl-1-pentene)-based dielectric film prepared by the invention has excellent breakdown strength and dielectric property, and the discharge energy density is as high as 5.92 J / cm < 3 > when the charge-discharge efficiency is greater than or equal to 90% at 150 DEG C.

The invention relates to the field of tires, and provides a degradable material reinforced environment-friendly tire, which comprises a tire main body, the tire main body at least comprises a tread, a sidewall, a cord fabric layer and a tire bead, the tread contains a degradable rubber material, and the degradable rubber material accounts for 20-50% of the total mass of the tread; the degradable rubber material contains polycaprolactone modified natural rubber accounting for 10%-30% of the total mass and is prepared by adopting a dynamic vulcanization process, dicumyl peroxide serves as a vulcanizing agent, the addition amount of dicumyl peroxide is 0.5%-1.5%, the vulcanization temperature is 140-160 DEG C, the vulcanization time is 8-15 minutes, and the number-average molecular weight of polycaprolactone is 10000-30000. The environment-friendly tire provided by the invention can be gradually decomposed in the natural environment, so that the pollution of the waste tire to the environment is effectively reduced, the problem that the traditional tire is difficult to degrade is solved, and the occupation of land resources and the risk of environmental pollution are greatly reduced.

The invention relates to an anti-aging PVC material, and belongs to the technical field of PVC material preparation, the anti-aging PVC material comprises the following raw materials: polyvinyl chloride resin, hydrotalcite, polyoxyethylene sorbitan monooleate, 4-n-octyl sodium benzenesulfonate, 4, 4 '-dihydroxy-4, 4'-dihydroxy-4, 4 '-dihydroxy-4, 4'-dihydroxy-4, 4 '-dihydroxy-4, 4'-dihydroxy-4, 4 '-dihydroxy-4, 4' The invention relates to a high-temperature-resistant anti-rust paint which is prepared from the following raw materials: 4, 4 '-thiobis (6-tert-butyl-3-methylphenol), 2-hydroxy-4-n-octyloxybenzophenone, trihydroxymethyl aminomethane, dicumyl peroxide and stearic acid. The hydrotalcite, the polyoxyethylene sorbitan monooleate and the sodium 4-n-octylbenzenesulfonate are added into the raw materials, so that the toughness of the finished PVC material is enhanced; by adding 4, 4 '-thiobis (6-tert-butyl-3-methylphenol), 2-hydroxy-4-n-octyloxybenzophenone and trihydroxymethyl aminomethane, the anti-aging performance of the finished product is synergistically improved from multiple angles of oxidation resistance, ultraviolet light conversion and thermal aging resistance.

The invention provides a high-pressure-resistant low-permeability hydrogen rubber sealing material and a preparation method thereof, and the sealing material comprises the following components by weight: 100 parts of ethylene propylene rubber; 4-8 parts of an active agent; 1-3 parts of an anti-aging agent; 20 to 50 parts of a nanometer material; 50 to 60 parts of a filling reinforcing agent; 2-5 parts of a coupling agent; 3-4 parts of a vulcanizing agent dicumyl peroxide; 1 to 2 parts of trialkenyl triisourea serving as an auxiliary vulcanizing agent; 3-8 parts of vulcanized resin; the invention also provides a preparation method of the high-pressure-resistant low-permeability hydrogen rubber sealing material. The preparation method comprises the following steps: pre-mixing, feeding and mixing, adding cross-linking components, standing and curing, hot-pressing and vulcanizing, post-curing and the like. The sealing material disclosed by the invention realizes high-level balance in the aspects of hydrogen permeation barrier, high-pressure burst resistance, wide-temperature interval tolerance and the like, and can effectively meet the sealing requirements of a hydrogen storage system and a high-pressure hydrogen conveying pipeline of a current hydrogen fuel automobile; the material has great advantages in the aspects of raw material cost, manufacturing process and performance stability.

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 tread rubber, and discloses high-performance tire tread rubber based on a synergistic system and a preparation method thereof.The method comprises the following steps of first-stage mixing, second-stage mixing, third-stage mixing, final mixing and vulcanization molding. By adopting a composite vulcanization system composed of dicumyl peroxide and sulfur and cooperating with zinc methacrylate as a functional auxiliary agent, a dual synergistic cross-linked structure composed of a free radical cross-linked network and an ionic cross-linked network is formed in the vulcanization process, so that the uniformity and stability of the cross-linked network structure of the tread rubber can be effectively improved, and the service life of the tread rubber is prolonged. The reasonable regulation and control of the crosslinking density of the tread rubber in the vulcanization process are ensured, the problem that a traditional single vulcanization system cannot give consideration to the wear resistance and the dynamic heat generation performance is solved, the comprehensive mechanical property and the dynamic use performance of the tread rubber are further improved, and firm chemical combination between the reinforcing filler and rubber molecules is ensured.

The invention relates to the technical field of foaming materials, in particular to a high-damping EVA / EPDM composite foaming material and a preparation method thereof. The high-damping EVA / EPDM composite foam material is prepared from the following raw materials in parts by weight: 150 to 80 parts of ethylene-vinyl acetate copolymer, 20 to 50 parts of ethylene propylene diene monomer, 3 to 5 parts of azodicarbonamide, 1 to 3 parts of dicumyl peroxide, 10 to 12 parts of compound filler, 6 to 10 parts of maleic anhydride grafted ethylene-octylene copolymer, 2 to 4 parts of hydroxyl-terminated polybutadiene and 1 to 4 parts of triallyl isocyanurate, the compound filler is formed by compounding silicon dioxide microspheres, graphene aerogel microspheres and modified barium titanate nanoparticles according to the mass ratio of 1: (1.5-1.7): (1.5-1.8); the high-damping EVA / EPDM composite foam material prepared by the invention not only has better high-damping and low-resilience properties, but also has excellent tensile strength, and the quality of the high-damping EVA / EPDM composite foam material is effectively ensured.