316 results about "Disulfide compound" patented technology

The present invention relates to a preparation method of an intelligent self-repairing, flame-retardant and light-resistant water-based polyurethane coating. The method comprises the following steps: preparing a self-made hyperbranched flame retardant and using it in the synthesis of a polyurethane prepolymer; cooling the mixture to 58° C., adding 2,2-dimethylolpropionic acid, reacting the mixture for 1 to 2 hours, adding 1 to 2 parts of a disulfide compound, reacting the mixture for 1 to 2 hours at 60 to 80° C., adding 1 to 2 parts of a hydrogen bonding agent, reacting the mixture for 1 hour at 60 to 80° C., adding 0.5 to 1.5 parts of a coumarin derivative, and reacting the mixture for 60 to 90° C. The mixture was stirred for 1-2 hours, and then spiropyran, diethanol monoisopropanolamine, and 0.01 parts of p-toluenesulfonamide were added, and the mixture was reacted at 50°C for 30 minutes. The temperature was lowered to 40-45°C, and 1-2 parts of triethylamine were added, and the mixture was reacted for 1-2 hours. The mixture was cooled to room temperature, and 60-65 parts of water were added. The mixture was stirred at a speed of 1800-2000 r / min for 0.5-1 hour to obtain an intelligent self-healing, flame-retardant, and light-resistant water-based polyurethane coating. The flame retardancy and self-healing properties of the obtained water-based polyurethane were significantly improved.

The invention discloses two-dimensional porous nano NiFe2O4 and a preparation method of a self-repairing noise-reducing anticorrosive coating of the two-dimensional porous nano NiFe2O4. The NiFe2O4 precursor is prepared by adopting a hydrothermal synthesis method, the nano NiFe2O4 with a stable and regular two-dimensional porous structure is prepared by high-temperature calcination, and the nano NiFe2O4 is rich in pores and relatively large in specific surface area. Polyester glycol, diisocyanate and disulfide are used as raw materials, addition polymerization is performed according to the molar ratio of 1: 2: 1 to prepare a polyurethane matrix, and key process parameters such as a reaction solvent, atmosphere, temperature and time are optimized. Chemical bonds such as disulfide bonds are introduced, so that the coating is endowed with excellent self-repairing performance, and meanwhile, the noise reduction capability and the anti-corrosion effect of the coating are remarkably enhanced. The two-dimensional porous nano NiFe2O4 reinforced polyurethane prepared by the invention provides a brand new design thought and technical path for the field of self-repairing noise-reducing anticorrosive materials.

The invention relates to a self-repairing polyurethane microcapsule as well as a preparation method and application thereof, and relates to the technical field of new materials. The microcapsule is mainly prepared from the following raw materials in parts by weight: 10 to 50 parts of polyisocyanate, 40 to 60 parts of oligomer polyol, 50 to 70 parts of a surfactant, 10 to 40 parts of a core material, 1 to 10 parts of a disulfide compound and 30 to 50 parts of a solvent. The self-repairing polyurethane microcapsule can recover the shape before damage under a heating condition, so that a wound is closed autonomously, and self-adaptive repairing of the damage is facilitated.

The invention discloses a preparation method and application of a zinc-bromine flow battery positive electrode material, and belongs to the field of zinc-bromine flow batteries. The preparation method comprises the following steps: dissolving aniline and a dithio compound in an acidic ice bath, dropwise adding a peroxy strong oxidant to generate a polyaniline-disulfide bond copolymer, dialyzing, and freeze-drying to obtain powder; then heating soluble silver salt, a reducing agent, a hydrophilic dispersing agent and an organic sulfydryl silane coupling agent to prepare functionalized nano-silver particles; the powder and nano-silver particles are dispersed in N-methyl pyrrolidone for ultrasonic treatment, and dynamic self-repairing coating slurry is prepared; and performing acid pretreatment on the carbon fiber paper, and performing electrochemical deposition on the slurry to prepare the zinc-bromine battery positive electrode material. According to the zinc-bromine battery positive electrode material, the coulombic efficiency and the voltage efficiency of a zinc-bromine flow battery are remarkably improved and the cycle life of the zinc-bromine flow battery is remarkably prolonged through methods of dynamic covalent bonds, nano-silver catalysis, a hierarchical pore structure, carbon fiber pretreatment and the like, and the zinc-bromine flow battery positive electrode material has chemical stability, efficient bromine adsorption capacity and excellent catalytic activity.

Disclosed herein are hyaluronic acid (HA)-nimesulide conjugates having one or two disaccharide units.

A method of producing a carbonate bonded article includes preparing a reactive mixture having a particulate mineral source and an aqueous source, and reacting the reactive mixture with carbon dioxide to form a mineral matrix including carbonates. The particulate mineral source includes a leachable compound, the leachable compound including one or more elements selected from: As, Ba, Cd, Cr, Co, Cu, F, Hg, Mo, Mn, Ni, Pb, Sb, Se, V, and Zn. The reactive mixture includes a reducing agent, where the reducing agent includes one or more of a sulfide, disulfide, and polysulfide compound that reacts with the particulate mineral source. The pH of the reactive mixture is at least 10.

The invention relates to a preparation method of an ultra-thin copper foil with metal-organic disulfide as a composite stripping layer, and belongs to the technical field of manufacturing of thin copper foils. The metal stripping layer is prepared through direct-current electrodeposition, and the interface of a carrier copper foil and the metal stripping layer is strongly combined; organic disulphide or organic disulphide salt is adsorbed between the metal stripping layer and the ultra-thin copper foil to form an organic stripping layer, so that a composite stripping layer with a uniform surface and stable performance is obtained, the stripping strength of the carrier copper foil is effectively reduced, and the ultra-thin copper foil is ultra-thin and uniform; and the binding force between the composite stripping layer and the carrier foil and the binding force between the composite stripping layer and the ultra-thin copper foil are different, so that the ultra-thin copper foil before and after pressing can be easily, completely and stably stripped from the carrier foil.

To provide a thermoplastic resin composition good in transparency, heat resistance, surface hardness, and impact resistance at room temperature and low temperature.SOLUTION: A thermoplastic resin composition includes: 10-95 mass% of a first methacrylic copolymer (A) including 10-99 mass% of MMA units, and 1-40 mass% of an isopropenyl aromatic compound unit, and having a Tg of 120-150°C; 5-40 mass% of a graft copolymer (B) obtained by graft-polymerizing a methacrylic copolymer (M) including 10-90 mass% of MMA units and 90-10 mass% of an aromatic vinyl compound unit to a butadiene rubber polymer (BR) including 60-100 mass% of a butadiene unit; 0-85 mass% of a second methacrylic copolymer (C); and 1-1,000 ppm of an organic disulfide compound (D), where the difference between a refractive index of the graft copolymer (B) and an average refractive index of the methacrylic copolymers (A), (C) is 0.01 or less.SELECTED DRAWING: None

The invention relates to the technical field of adhesives, in particular to a low-temperature-resistant adhesive and a preparation method thereof.The low-temperature-resistant adhesive is characterized in that waterborne polyurethane is selected as base glue, and carboxylated styrene-butadiene emulsion is added to improve the film forming strength, binding power, stability, flowability and film forming property of the adhesive; trimethanol propane poly (oxypropylene) triether is taken as a center, 2, 2-dimethylolpropionic acid is taken as a hydrophilic chain extender, 2-ethoxyl disulfide containing disulfide bonds is added to improve the self-repairing property, and epoxidized fluorine-containing polysiloxane is taken as an end-capping reagent; according to the present invention, the graphene oxide is adopted as the filler, the graphene oxide is subjected to sulfhydrylation by using the beta-mercaptoethanol, and the epoxidized fluorine-containing polysiloxane is grafted by using the sulfydryl-epoxy reaction, such that the low temperature resistance, the ultraviolet resistance, the water resistance and the adhesion property of the adhesive are substantially improved so as to prolong the service life of the adhesive;

An industrial gas purification catalyst, and a preparation and a use thereof. The catalyst comprises a type A molecular sieve, and MoO3 / WO3 and NiO / CoO loaded on the type A molecular sieve, the content of molybdenum or tungsten being 3-12 wt% in terms of MoO3 or WO3, and the content of nickel or cobalt being 3-7 wt% in terms of NiO or CoO; by molar ratio, the molecular sieve also contains 55%-75% alkali metal or alkaline earth metal that has not undergone ion exchange, the alkali metal or alkaline earth metal being sodium, potassium, or calcium. The catalyst can be used to purify oxygen, olefins, HCN, thiophene, disulfide, mercaptan, sulfide, CS2 and other complex sulfides and / or COS in ammonia-containing and high-CO+CO2 gas sources, to achieve a target purification effect.

The invention discloses a method for determining the content of bis (2-aminophenyl) disulfide in 2-aminothiophenol. The method comprises the following steps: preparing an acetonitrile solution of citric acid as a diluent; preparing a system applicability solution, a reference solution and a test solution by using a diluent; a diluent, a system applicability solution, a reference substance solution and a test solution are sequentially injected by adopting a liquid chromatography, and the content of bis (2-aminophenyl) disulfide in a 2-aminothiophenol sample is determined by adopting an external standard method. The antioxidant citric acid is added into the diluent, so that the generation of the disulfide compound is inhibited, the existing disulfide compound is not damaged, the solution stability is high, the operation is simple, the system applicability, specificity, accuracy, precision and durability completely accord with the guidance principle verified by the Chinese pharmacopoeia method, and the method is suitable for industrial production. The method can be used for quality control of 2-aminothiophenol.

The invention provides a preparation method of high-purity bis (2, 4, 4-trimethylpentyl) phosphinic acid, and belongs to the technical field of organic synthesis. The preparation method comprises the steps that a phosphorus source, diisobutylene, an initiator, a solvent and a catalyst are added into a sealed reaction kettle capable of being stirred and heated to be subjected to a reaction, the high-purity bis (2, 4, 4-trimethylpentyl) phosphinic acid is obtained, the phosphorus source is sodium hypophosphite or hypophosphorous acid, and the catalyst is disulfide. According to the preparation method provided by the invention, the disulfide is adopted as the catalyst to be added into the reaction, so that the reaction can be effectively promoted to shorten the reaction time and improve the yield and purity of the product, and meanwhile, the side reaction is few, the post-treatment is simple, and the product impurity content is low.

The invention discloses a dual-band acridine formic acid anthracene methyl ester photocatalyst as well as a preparation method and application thereof, and belongs to the field of heterocyclic compounds. The invention designs and synthesizes a novel acridine formic acid anthracene methyl ester photocatalyst, which has good compatibility in two wavebands of 365 nm and 405 nm, can realize photocatalysis of disulfide compounds and aryl formyl peroxide compounds, and provides a new thought for preparation of sulfoxide compounds with asymmetric structures; the reaction conditions are mild, the reaction time is short, the photocatalyst can be recycled, the circulation loss is low, the circulation efficiency is high, the production efficiency is greatly improved, and the production period and cost are reduced; the product is free of transition metal residues and high in yield.

The invention belongs to the technical field of high polymer material synthesis, and particularly relates to UV-cured waterborne polyurethane acrylate resin as well as a preparation method and application thereof. The method comprises the following steps: preparing a disulfide bond and imine bond series dynamic bond monomer based on a Schiff base reaction of disulfide; a series dynamic bond monomer is introduced into waterborne polyurethane acrylate resin as a functional chain extender, and compared with light-cured resin with a single dynamic bond and a simple mixed dynamic bond, the series dynamic bond has lower activation energy, so that the light-cured coating based on the series dynamic bond is endowed with more excellent self-repairing performance; and meanwhile, the good mechanical property and excellent metal base material adhesive force of the coating are kept. The multiple dynamic bonds also enable the photocuring coating to have a multi-mode self-repairing capability, and the UV curing coating has excellent self-repairing performance under the stimulation of heat and ultraviolet.

Methods are provided for hydrothermal synthesis of porous crystalline materials. The method generally comprises forming a solution of precursors and reagents in effective ratios for a porous crystalline material including a fluoride-containing mineralizer, and water-soluble oxidized disulfide oil. The solution is hydrothermally treated under effective conditions and for an effective time to synthesize porous crystalline materials.

The invention belongs to the technical field of epoxy resin, and particularly relates to double-dynamic-bond synergistic exchange epoxy resin as well as a preparation method and application thereof. The preparation method of the double dynamic bond synergistic exchange epoxy resin comprises the following steps: adding aromatic dialdehyde and amino-containing disulfide into a solvent for condensation reaction, and filtering and drying to obtain a double dynamic bond curing agent; the preparation method comprises the following steps: adding the double-dynamic-bond curing agent into epoxy resin, carrying out ring-opening addition reaction, carrying out gradient heating curing, and cooling to room temperature, the aromatic dialdehyde is terephthalaldehyde, isophthalaldehyde or o-phthalaldehyde, and the amino-containing disulfide is 2, 2 '-diaminodiphenyl disulfide or 4, 4'-diaminodiphenyl disulfide. The invention designs and synthesizes a double-dynamic covalent bond curing agent containing an imine bond and a disulfide bond, and is used for constructing a novel degradable and self-healing epoxy resin. The material maintains good thermal stability and insulation performance, and realizes degradation and self-healing functions at the same time.

The invention discloses an antistatic coating and a preparation process thereof, and relates to the technical field of coatings. The antistatic coating is prepared from the following components: modified polyurethane emulsion, water-borne epoxy resin, water-borne acrylic resin, modified graphene oxide, a de-foaming agent and de-ionized water, the modified polyurethane emulsion contains a disulfide compound and dihydroxy quaternary ammonium salt; the modified graphene oxide is obtained by modifying cerium oxide and an amino coupling agent. According to the invention, the dihydroxy quaternary ammonium salt is prepared through amidation reaction and quaternization reaction in sequence, and the dihydroxy quaternary ammonium salt and the disulfide are used for modifying polyurethane together, so that the coating is endowed with antistatic and self-repairing properties; ce < 3 + > is loaded on the surface of the graphene oxide to form a more efficient conductive network, the antistatic performance of the coating is further improved, the amino coupling agent is connected with the cerium-loaded graphene oxide and the modified polyurethane to form a complex network structure, the dispersity of the cerium-loaded graphene oxide in the coating is improved, and agglomeration is reduced.

The invention provides a high-elasticity tear-resistant silicone rubber material and a preparation method thereof.The high-elasticity tear-resistant silicone rubber material is characterized by being prepared from, by mass, 100 parts of vinyl polysiloxane, 5-15 parts of phenylboronic acid end group modified polydimethylsiloxane and 1-5 parts of 2, 3-dihydroxypropyl disulfide, the adhesive comprises the following components in parts by mass: 10-30 parts of fumed silica, 1-5 parts of a cross-linking agent, 1-2 parts of a plasticizer and 0.001-0.005 part of a catalyst. By introducing the combination of phenylboronic acid end group modified polydimethylsiloxane and 2, 3-dihydroxypropyl disulfide, a dual dynamic covalent bond network with a stress triggering characteristic is constructed in a silicone rubber system, and when the material is subjected to external force, a disulfide bond is used as a sacrificial unit to preferentially break to dissipate energy and generate micro-voids, so that the stress triggering performance of the material is improved. And then stress-triggered boric acid ester bond dynamic recombination further disperses stress and stabilizes a micro-cavity structure, so that graded dissipation of energy is realized, crack propagation is reduced, and the elasticity and tear resistance of the material are improved.

The invention discloses a double dynamic bond self-repairing polyurethane elastomer as well as a preparation method and application thereof, and belongs to the technical field of high polymer materials. The elastomer is prepared from the following raw materials in percentage by mass: 74 to 76 percent of polyether polyol, 15.5 to 18 percent of diisocyanate, 1.67 to 7 percent of dihydrazide compound and 2.1 to 6.7 percent of disulfide. The preparation method comprises the following steps: firstly, reacting polyether polyol with diisocyanate to obtain a prepolymer, then sequentially carrying out step-by-step chain extension reaction on the prepolymer, the bishydrazide compound and the disulfide compound, and finally, curing and forming. According to the invention, a synergistic structure of a hydrogen bond hard segment and a disulfide bond soft segment is constructed step by step, so that the material has high mechanical properties and efficient self-repairing capability. The elastomer is suitable for the fields of industrial pipeline sealing pieces, flexible packaging films, sports equipment accessories and the like, and solves the problem that the strength and repairing performance of an existing self-repairing polyurethane material are difficult to balance.

The invention belongs to the technical field of organic synthesis, and discloses a synthesis method of a disulfide compound. According to the invention, under the catalytic action of 1, 4, 7, 10, 13, 16-hexaoxacyclo-octadecane, halogenated hydrocarbon, sodium sulfide and sulfur react at the temperature of 50-60 DEG C to prepare the disulfide compound. The synthesis method of the disulfide compound has the advantages of being simple in process, small in catalyst dosage, mild in reaction condition, high in production efficiency, low in production cost, convenient for industrial production and the like, in addition, the reaction yield of the synthesis method can reach 94.8%-96.6%, and the purity of the obtained target product reaches up to 97.9%-99.3%. The method can be applied to preparation of the disulfide compound, and the obtained disulfide compound can be further applied to the fields of biomedicine, agriculture, chemical industry and the like.

The invention relates to a preparation method of high-yield and high-purity polyphenylene sulfide, and belongs to the field of oxidative polymerization. The technical problem to be solved by the invention is to provide a production method of polyphenylene sulfide with mild reaction conditions, high yield and high purity. According to the method, diphenyl disulfide is taken as a raw material, thionyl chloride is taken as a solvent, oxygen is taken as an oxidizing agent, a vanadium-based Lewis acid complex is taken as a catalyst, and the main technological process comprises the steps of feeding, synergistic action of the catalyst and the oxygen, polymerization, filtration, washing, drying and oxidative polymerization at normal temperature and normal pressure to obtain the high-yield and high-purity polyphenylene sulfide. The method is simple in process flow and mild in condition, does not need to introduce other polymerization additives, avoids the influence of metal sodium salt and other by-products generated by many preparation methods on the toughness of the product, and has the yield of almost 100% and high product purity.

The application discloses a preparation method of a photo-thermal ice-resistant super-hydrophobic coating and the super-hydrophobic coating, and comprises the following steps: heating and vacuumizing polytetrahydrofuran (PTMG) to remove water, so as to obtain PTMG after water removal; heating and vacuumizing hydroxypropyl-terminated polydimethylsiloxane (PDMS-OH) to remove water, so as to obtain PDMS-OH after water removal; mixing the PDMS-OH after water removal and the PTMG after water removal, adding ethyl acetate solvent to stir, adding dicyclohexylmethane diisocyanate (HMDI) and dibutyltin dilaurate (DBTDL) dropwise, pre-polymerizing, adding di(2-hydroxyethyl) disulfide (HEDS) when the reaction reaches equilibrium, and preparing polyurethane after the reaction is completed; mixing ZrN nanoparticles, SiO2-F and the polyurethane to obtain a suspension through ultrasonic treatment; spraying the suspension to obtain a coating, and drying the coating to obtain the photo-thermal ice-resistant super-hydrophobic coating. The coating prepared by the application has excellent ice-resistant performance, and can delay the icing time for up to 1422s at-20 DEG C, and the icing time of a blank control group is 17s, which is better than most of the known ice-resistant super-hydrophobic coatings.

Provided is a rubber composition with which it is possible to obtain a vulcanized product and a vulcanized molded product having excellent wear resistance. According to the present invention, there is provided a rubber composition containing a chloroprene rubber, silica, a silane coupling agent, and a hydrate, the rubber composition containing 5-80 parts by mass of silica and 0.5-20 parts by mass or more of hydrate per 100 parts by mass of the chloroprene rubber, and the rubber composition containing 5-80 parts by mass of silica and 0.5-20 parts by mass of hydrate per 100 parts by mass of the chloroprene rubber. The content of a silane coupling agent is 0.5-15 parts by mass per 100 parts by mass of the silica, and the rubber composition satisfies at least one of the following conditions i) and ii): condition i) the rubber composition contains 3-methyl-thiazolidine-2-thione, and in the rubber composition, the content of 3-methyl-thiazolidine-2-thione is 0.5-15 parts by mass per 100 parts by mass of the chloroprene-based rubber, and the content of 3-methyl-thiazolidine-2-thione is 0.5-15 parts by mass per 100 parts by mass of the chloroprene-based rubber. The composition contains 0.1 to 3.0 parts by mass of 3-methyl-thiazolidine-2-thioketone; condition ii) the rubber composition contains a compound A and a compound B. The compound A is at least one compound selected from the group consisting of thiourea compounds, 3-methyl-thiazolidine-2-thione, and bis (5-mercapto-1, 3, 4-thiadiazol-2-yl) disulfides, and the compound B is at least one compound selected from the group consisting of thiourea compounds, 3-methyl-thiazolidine-2-thione, and bis (5-mercapto-1, 3, 4-thiadiazol-2-yl) disulfides. The compound B is at least one compound selected from the group consisting of thiuram-based compounds, sulfinamide-based compounds, thiazole-based compounds, guanidine-based compounds, benzimidazole-based compounds, N-phenyl-N-(trichloromethylthio) benzsulfonamide, and diazabicyclo-undecene-based compounds, and the content of the compound B is 100 parts by mass per 100 parts by mass of the chloroprene rubber. The rubber composition contains 0.1 to 3.0 parts by mass of a compound A and 0.01 to 3.0 parts by mass of a compound B.

The invention discloses a polyurethane modified low-temperature adaptive protective earplug material and a preparation process thereof, and belongs to the technical field of earplug materials. The earplug material comprises a component A, a component B, a component C and a component D, wherein the component A is prepared from isocyanate, 2-hydroxyethyl disulfide and octafluoro-1, 6-hexanediol; the component B comprises polyether polyol, perfluoropolyether glycol, polysiloxane, a foaming agent, a foam stabilizer, a dynamic cross-linking agent and a catalyst. 2-hydroxyethyl disulfide and octafluoro-1, 6-hexanediol are used for partially modifying a hard section of a polyurethane material, and perfluoropolyether glycol, polysiloxane and polyether polyol are grafted, so that the hardness of the earplug material at a low temperature is reduced through synergism of all the components, and the earplug material has low-temperature flexibility, tear resistance, hydrophobicity and pollution resistance; and low-temperature embrittlement can be avoided.

The invention is applied to the technical field of compound preparation, and discloses a synthesis method of o-aminothiophenol, which comprises the following steps: uniformly mixing 2-chloronitrobenzene, water and strongly basic anion exchange resin, heating, dropwise adding a hydrosulfide aqueous solution, carrying out heat preservation reaction, cooling and filtering after the reaction is finished, and drying to obtain the o-aminothiophenol. Eluting the filter cake with liquid alkali, acidifying and layering to obtain an o-aminothiophenol crude product, and distilling to obtain the product. The thiophenol and the basic group of the resin are salified, the main reaction for generating 2-nitrothiophenol is promoted in the early stage, and the generation of a nitroreduction byproduct 2-aminochlorobenzene is greatly reduced, so that the product yield is greatly improved; the product stability is improved by salifying, so that disulfides are prevented from being formed by bimolecular oxidation of thiophenol, reduction is not needed, the product can be obtained by acidification after alkali elution, the process is shortened, and the cost is reduced; the production process is simple to operate, pressure reaction is avoided, the requirement on equipment is low, and the yield is high and can reach 95% or above; the purity of the obtained product can reach 99% or above.

The invention provides a preparation method of bis-[3-(triethoxysilyl) propyl]-disulfide. The preparation method comprises the following steps: S1, under the protection of nitrogen, dropwise adding chloropropene and trichlorosilane into a non-polar solvent, a first catalyst and tripropylamine, reacting at room temperature, taking filtrate, dropwise adding the filtrate into alcohol in a micro-reflux state, reacting, adding a sodium alkoxide / alcohol solution for neutralizing, filtering, and distilling to obtain allyltriethoxysilane; and S2, under ultraviolet light, mixing allyltriethoxysilane, mercaptopropyltriethoxysilane and benzoin dimethyl ether, reacting at room temperature for 2-3 hours, adding sulfur and a second catalyst, carrying out heating reaction, removing low boiling points, cooling, and filtering. According to the preparation method provided by the invention, bis-[3-(triethoxysilyl) propyl]-disulfide is successfully and effectively synthesized, a phase transfer catalyst does not need to be introduced for catalysis, hydrolysis of silane and treatment of saline water are reduced, the yield of single-kettle synthesis is high, and the utilization rate of equipment is high.

The invention discloses a quantitative detection method for a mixture of bis (2-hydroxyethyl) disulfide and mercaptoethanol, and relates to the field of analysis and detection. The testing method comprises the following steps: respectively preparing a bis (2-ethoxyl) disulfide standard solution and a mercaptoethanol standard solution with different concentrations; and quantitatively measuring the standard solution and the detection sample through gas chromatography equipment, optimizing chromatographic conditions, drawing a standard curve according to the detection result of the standard solution, and quantitatively analyzing the detection sample by combining the standard curve and the spectrum of the standard solution. According to the present invention, the gas chromatography conditions are optimized, the phenyl functional group-containing polysiloxane is selected as the filler of the chromatographic column, and the detection temperature and the temperature rising program are controlled so as to ensure the separation and the detector sensitivity, and the split ratio is controlled to avoid the non-linear response and the peak overlapping; the detection accuracy of the bi-component bis (2-ethoxyl) disulfide and mercaptoethanol is high, the chromatographic peak separation degree is good, and the product quality detection requirement can be met.

The application provides an isomerized eucommia elastomer and a preparation method and application thereof. The isomerized eucommia elastomer forms cis-isoprene structure in the molecular chain through self-isomerization reaction. By regulating the content of cis structure, the regulation of the regularity of the molecular chain is realized, so that the isomerized eucommia rubber no longer crystallizes at room temperature and exhibits high elasticity. Meanwhile, the suitable regularity enables the isomerized eucommia rubber to have self-reinforcing capacity and exhibit excellent mechanical strength. The application also provides a preparation method and application of the isomerized eucommia elastomer. The isomerization modification of the eucommia rubber is carried out by using a mercapto compound or a disulfide compound under the initiation of a free radical initiator. The high-performance isomerized eucommia rubber elastomer material obtained by the application does not change the original chemical structure and polarity of the eucommia rubber, has similar structure and performance to natural rubber, can make up for the problem of insufficient yield of natural rubber, and has wide application prospects in the fields of tires, conveyor belts, sealing rings, wearable devices and the like.

The phenylenediamine-based antioxidant is used as a substitute for 6PPD, while improving scorch resistance and heat aging resistance. [Solution] The rubber composition according to the embodiment comprises a rubber component, a phenylenediamine-based antioxidant represented by the following formula (1), and a thiuram disulfide-based vulcanization accelerator. In formula (1), R 1 and R 2 Each of these independently represents a hydrocarbon group having 6 or more carbon atoms, however, R 1 and R 2 Except when it is a combination of a phenyl group and a 1,3-dimethylbutyl group. [Formula 1] JPEG2026103949000010.jpg42129

The present application relates to a kind of preparation method of extremely thin copper foil with metal-organic disulfide as composite stripping layer, belong to the manufacturing technical field of thin thickness copper foil, the present application uses direct current deposition to prepare metal stripping layer, the interface of carrier copper foil and metal stripping layer is stronger combined, then organic disulfide or organic disulfide salt is adsorbed between metal stripping layer and extremely thin copper foil, form organic stripping layer, obtain the composite stripping layer of surface uniformity, stable performance, effectively reduce the stripping strength of carrier copper foil, extremely thin copper foil is extremely thin and uniform, and the bonding force between composite stripping layer and carrier foil and extremely thin copper foil is different, can make the extremely thin copper foil before and after pressing be easily completely, stably and with carrier foil stripping.