802 results about "Octene" patented technology

The preparation method comprises the following steps: firstly, uniformly stirring and mixing synthetic fluorophlogopite, silica, polymethylsilsesquioxane, boron nitride, bismuth oxychloride, zinc stearate, aluminum starch octenylsuccinate, mica, aluminum oxide, hydrolyzed sodium hyaluronate and toner in a stirring homogenizer; then uniformly mixing polydimethylsiloxane, octyldodecanol stearoyloxy stearate, isoamyl laurate, diisostearyl malate, phenoxyethanol and caprylyl glycol, and heating to 45 + / -5 DEG C; pouring the mixture into an oil spraying barrel of a stirring homogenizer, uniformly stirring and mixing while spraying oil, crushing, then carrying out airflow crushing, sieving the material, putting the sieved material into a mold plate, and carrying out compression molding, so as to obtain a pressed powder block; and putting the mixture into a packing material powder box to obtain the make-up fixing and brightening pressed powder. The pressed powder is prepared by adding an airflow crushing process, the particle size of the powder is smaller, the powder is dispersed more uniformly, the powder is pressed into the solid pressed powder, and the phenomenon of powder flying is well reduced while makeup fixing and brightening effects are achieved.

The invention discloses an anti-shrinkage light, soft and elastic sole foaming material and a preparation method thereof, and belongs to the technical field of footwear products. The light, soft and elastic sole foaming material is formed by chemically foaming an EVA (Ethylene Vinyl Acetate) composite raw material, the EVA composite raw material is prepared from 50 to 70 parts of EVA, 20 to 40 parts of olefin thermoplastic elastomer, 10 to 20 parts of styrene elastomer, 1.5 to 3 parts of maleic anhydride grafted ethylene-octylene copolymer compatilizer, 0.4 to 0.8 part of peroxide cross-linking agent, 3 to 4 parts of foaming agent, 1 to 1.5 parts of zinc oxide, 1 to 1.5 parts of polyethylene wax substance and 0.5 to 1.5 parts of poly (butylene succinate). 0.3 to 1 part of polyamide 12 microspheres and 2 to 3 parts of nano montmorillonite. The foaming material can resist shrinkage when being used as a shoe sole part, and has good rebound performance and the like, so that the high-quality requirement of sneakers, the mass production stability and the like are met.

The invention belongs to the technical field of sole materials, and particularly discloses an anti-skid sole material and a preparation method thereof. The anti-skid sole material comprises a sole body, the sole body comprises an anti-skid layer and a rubber layer, and the anti-skid layer comprises the following raw material components in parts by weight; comprising 50-55 parts of polyurethane, 16-20 parts of a silicon carbide composite material, 10-14 parts of polyethylene composite fibers, 4-8 parts of a maleic anhydride grafted polyethylene octylene co-elastomer, 3-5 parts of a silane coupling agent, 1-2 parts of an antioxidant and 0.5-0.8 part of a lubricant. The anti-skid sole material prepared in the invention has excellent mechanical strength, skid resistance and wear resistance, and can provide protection for feet and prolong the service life of soles.

Disclosed in the present invention are a 90°C thermoplastic halogen-free low-smoke flame-retardant polyolefin sheath material and a preparation method therefor. The sheath material is prepared from raw materials comprising the following components in parts by mass: 20-40 parts of an ethylene-vinyl acetate copolymer, 20-40 parts of a linear low-density polyethylene, 2-10 parts of a high-density polyethylene, 20-40 parts of a metallocene ethylene-octylene copolymer, 10-15 parts of a maleic-anhydride-grafted metallocene linear low-density polyethylene copolymer, 58-73 parts of aluminum hydroxide, 20-25 parts of modified magnesium hydroxide, 64-84 parts of a synergistic flame retardant, 2-3 parts of a coupling agent, 1-4 parts of a lubricant, 1-3 parts of an antioxidant, and 2-7 parts of a coloring agent, wherein the synergistic flame retardant comprises lithium oxide. A matrix resin has low-temperature performance, mechanical properties and cracking resistance. With regard to flame retardance, a large amount of the synergistic flame retardant, i.e., lithium oxide, is added to a traditional magnesium-aluminum compound flame-retardant system, and therefore an off-white hard shell can be formed during a combustion process while low heat release is ensured, thereby ensuring no dripping during the combustion process.

The invention relates to the technical field of materials, and discloses a wear-resistant high-toughness polypropylene material and a preparation method thereof.The polypropylene material is prepared by taking polypropylene as a base material and taking a compatibilizer, an ethylene-octylene block copolymer, a mullite functional agent and the like as auxiliary materials through mixing and melt extrusion processes. Wherein the mullite functional agent is prepared by modifying the surface of mullite with a branched macromolecular polymer connected by an ester bond, and the existence of the macromolecular polymer can improve the compatibility between the mullite and a polypropylene matrix, so that the mullite can efficiently exert the self-enhancement effect, the stress deformation resistance of the material is improved, and the mechanical property of the material is improved. And the material has high-strength and high-toughness effects. Besides, the macromolecular polymer can be cross-linked with a polypropylene molecular chain, so that the structural density of the material is improved, the material has higher hardness, the grinding crack width of the material on a membrane material surface is reduced, and the wear resistance of the material is improved.

The invention relates to the technical field of waterproof materials, and particularly discloses a self-adhesive polymer modified asphalt waterproof material as well as a preparation method and application thereof. The self-adhesive polymer modified asphalt waterproof material is prepared from the following raw materials in parts by mass: 45 to 55 parts of asphalt, 8 to 12 parts of softening oil, 10 to 15 parts of modifier, 8 to 12 parts of desulfurized rubber and 10 to 15 parts of filler, the modifier comprises the following raw materials: an ethylene-octylene copolymer, butadiene styrene rubber, coumarone resin and a functional modified material; the functional modified material is prepared from illite and phthalic acid ester. Through the design of the modifier and the proportion design of the raw material components, the synergistic interaction effect of the raw materials is fully played, the comprehensive performance of the waterproof material is improved, and the self-adhesive polymer modified asphalt waterproof coiled material prepared from the waterproof material has excellent high and low temperature properties, persistent adhesivity, peel strength, aging resistance and water resistance.

The invention relates to the technical field of polymer composite materials, in particular to a carbon fiber reinforced nylon 66 / polyphenylene sulfide composite material and a preparation method thereof.The carbon fiber reinforced nylon 66 / polyphenylene sulfide composite material is prepared from, by weight, 40-55 parts of nylon 66, 30-45 parts of polyphenylene sulfide, 15-30 parts of carbon fibers, 5-6 parts of compatilizer, 0.8-1.2 parts of antioxidant and 3-4 parts of flexibilizer, the flexibilizer is ethylene-octylene copolymer grafted maleic anhydride, the grafting rate is 1.2-1.5%, the flexibilizer is ethylene-octylene copolymer grafted maleic anhydride, the grafting rate is 0.8-1.0%, and the antioxidant is a mixture of an antioxidant 1010 and an antioxidant 168 according to a mass ratio of 1: 1. The composite material prepared by the invention is suitable for medium-high temperature scenes, not only solves the problems of insufficient high temperature resistance and poor mechanical properties of traditional materials, but also has good processability and environmental tolerance.

The application provides a preparation method of an octene aldehyde liquid-phase hydrogenation catalyst, and steps of the method comprise the following: (1) preparing a salt solution containing nickel ions, copper ions and aluminum ions, heating to 40-80 DEG C, adding a basic precipitator to react, and aging after the reaction is completed; (2) uniformly mixing the precipitate obtained after aging in step (1) with silica sol to obtain slurry; (3) washing and filtering the slurry, then adding alkali metal carbonate powder and boron nitride solid, uniformly mixing, and then shaping, drying and calcining to obtain the octene aldehyde liquid-phase hydrogenation catalyst. The preparation method is simple, green, environmentally friendly and easy to industrialize, the conversion rate and selectivity of the obtained octene aldehyde liquid-phase hydrogenation catalyst are high, and the catalyst is stable in performance and durable.

The invention discloses a silane self-crosslinking polyethylene overhead insulation material for a cable and a preparation method. The insulating material comprises a polyethylene base material, a silane coupling agent, a catalyst, an antioxidant, a nanoscale reinforcing filler, a core-shell structure filler and nano montmorillonite. The polyethylene base material is a blend of polyethylene with different densities and can give consideration to rigidity and toughness; the nanoscale reinforcing filler is nano calcium carbonate modified by silane; the core-shell structure filler takes nano calcium carbonate as a core and an ethylene-octylene copolymer as a shell, so that the processing fluidity can be improved, and the filler agglomeration can be avoided; the nano montmorillonite can improve the aging resistance and the electrical insulation strength. The preparation method comprises the steps of nano filler pretreatment, nano montmorillonite modification, polyethylene base material blending, component mixing, crosslinking and post-treatment, through the pretreatment, modification, optimized mixing and crosslinking processes, it is ensured that all components are evenly dispersed, compatibility is improved, and the processing performance, the mechanical performance and the electrical performance of a finished product are balanced.

The invention discloses a PP (polypropylene) material with scratch resistance. The PP material is prepared from the following raw materials in parts by weight: 75-85 parts of a PP matrix; 3 to 8 parts of modified nano silicon dioxide; 5 to 10 parts of an ethylene-octylene copolymer (POE); 2-5 parts of an organosilicon elastomer; 1 to 4 parts of hyperbranched polymer (HBP); 1 to 3 parts of self-repairing microcapsules; 2-5 parts of nano calcium carbonate; 0.3 to 0.8 part of an antioxidant; and 0.5-2 parts of a dispersant. Through the synergistic effect of the modified nano silicon dioxide, the nano calcium carbonate and the hyperbranched polymer (HBP), the surface hardness and the scratch resistance of the PP material are improved, the compatibility of the nano silicon dioxide and the nano calcium carbonate with a PP matrix is enhanced through modification treatment of the nano silicon dioxide and the nano calcium carbonate, and the mechanical property and the wear resistance of the material are improved.

The invention discloses a preparation method of a double embedding emulsion preparation / emulsion based on octenyl succinic acid cyclodextrin ester, and relates to an inclusion compound based on modified cyclodextrin and a stable Pickering emulsion system thereof. According to the method, the uniformity of the cyclodextrin modification substitution degree is improved through ultrasonic assistance, the embedding rate and the embedding stability of hydrophobic active ingredients can be improved, meanwhile, the Pickering emulsion is stabilized, preparation of the double-embedded emulsion preparation is achieved, and the stability and the packaging efficiency of an emulsion preparation packaging delivery system can be effectively improved through the method. The method comprises the following steps: 1, preparing octenyl succinic acid cyclodextrin ester; 2, preparing an OSA-beta-CD / phenolic compound clathrate compound; and 3, preparing the dual-embedding emulsion preparation / emulsion. The invention provides a preparation method of a double-embedding emulsion preparation / emulsion based on octenyl succinic acid cyclodextrin ester. The double-embedding emulsion preparation / emulsion can be applied to a double-embedding food functional component delivery system.

The present invention relates to the technical field of ethylene oligomerization catalysts, and discloses a ligand compound, a selective ethylene oligomerization catalytic composition and application thereof, and a selective ethylene oligomerization reaction method, the ligand compound has a structure represented by a formula (1) # imgabs0 #, Ar and Ar'are independently selected from substituted or unsubstituted aryl or heteroaryl; 1, 2-positions are substituted or unsubstituted cyclic substituents. The ligand compound is applied to a selective ethylene oligomerization catalytic composition, high ethylene trimerization and tetramerization catalytic activity can be obtained, hexene-1 and octylene-1 selectivity is high, the high-molecular polymer content is low, the risk of scaling and blocking of a reaction pipeline in a continuous reaction can be greatly reduced, and the selectivity of ethylene oligomerization is high. Good industrial application prospects and economic values are realized.

The invention discloses a preparation method of liposome for encapsulating euphausia superba oil, and belongs to the field of euphausia superba oil. Through material selection and hierarchical structure design, starch octenyl succinate, sodium alginate and pea protein are screened as composite wall materials, and the materials can achieve a synergistic effect on the molecule-interface-micro-nano scale to delay lipid oxidation, control the targeted release characteristic of active ingredients and improve the absorption efficiency of fat-soluble ingredients. Moreover, the liposome raw material of the euphausia superba oil is screened, and the liposome with low particle size and high stability is prepared.

An extreme-cold resistant low-fume halogen-free flame-retardant polyolefin sheath, a preparation method therefor, and a cable. The sheath comprises the following raw materials in parts by mass: 4-16 parts of an ethylene-vinyl acetate copolymer, 7-13 parts of a phosphate group functionalized linear low-density polyethylene, 9-15 parts of an ethylene-octene copolymer, 5-10 parts of a maleic anhydride-grafted ethylene-methyl methacrylate copolymer, 10-15 parts of magnesium hydroxide, 40-50 parts of aluminum hydroxide, etc. The preparation method for the phosphate group functionalized linear low-density polyethylene comprises: adding a catalyst to a pre-cooled ethylene monomer, adding a vinyl phosphate ester and an initiator after the reaction, and reacting for 1-2 hours at a temperature of 65-75°C and a pressure of 15-35 Mpa and then terminating the reaction, thereby obtaining the phosphate group functionalized linear low-density polyethylene. Compared with unfunctionalized polyethylene, the phosphate group functionalized polyethylene used has greatly improved low-temperature and flame-retardant performance, and can improve the overall flame-retardant and low-temperature performance of the formula.

The invention discloses a method for synthesizing degradable polyethylene through copolymerization of conjugated lactone and cycloolefin. The preparation method comprises the following steps: catalyzing ring-opening metathesis polymerization of alpha, beta-unsaturated lactone and a cycloolefin monomer by using a Grubbs catalyst, hydrogenating the obtained copolymer to prepare a series of polyethylene-like materials with different densities introduced into ester groups in a main chain, and simultaneously retaining the thermal and mechanical properties of high-density polyethylene; after the polyethylene material is degraded and recycled through alcoholysis, polyethylene-like with high molecular weight and excellent performance can be obtained again through a polycondensation method, and the problem that an existing polyethylene material is difficult to recycle is solved. The synthesis method is simple and convenient to operate, the polymer obtained by copolymerization of conjugated lactone and cyclooctene is high in molecular weight, and ester groups in a main chain are uniformly distributed. Regioselectivity of conjugated lactone polymerization is good, and an AB type monomer obtained after alcoholysis is beneficial to polycondensation to obtain a high-molecular-weight polymer. The hydrogenated product is pure white solid powder, has few metal catalyst residues, and is expected to replace a bulk polyethylene material.

The invention discloses an ionomer enhanced PA composite material and a preparation method thereof in the field of polyamide materials. The ionomer enhanced PA composite material comprises the following components in parts by weight: 70-80 parts of PA6, 20-30 parts of an ethylene-octylene copolymer, 1-3 parts of an enhancer, 0.02-0.05 part of an initiator and 0.05-0.1 part of an antioxidant. An ionomer reinforcing agent, ionic bonds and hydrogen bonds are added in a PA6 and POE system, so that the reinforcing agent and PA6 form a'synergistic stress network ', local stress concentration is reduced, strength is improved, 'strength-toughness-rigidity' synergistic improvement is achieved, an ionomer structure of the reinforcing agent is compatible with polar PA6 and a non-polar ethylene-octene copolymer at the same time, and the strength of the POE is improved. The phase separation defect is eliminated, and the material performance stability is high.

The invention discloses a bacteriostatic food packaging bag and a preparation method thereof, and relates to the technical field of food packaging, the bacteriostatic food packaging bag comprises the following components by weight: 12-22 parts of bamboo fiber; 55 to 80 parts of TPS (Thermoplastic Polystyrene); 15-20 parts of a modified ethylene composite copolymer; 15 to 20 parts of modified chitosan; wherein the modified ethylene composite copolymer is obtained by polymerizing active group-containing ethylene and one of vinyl acetate, butene, hexene or octylene according to a molar ratio of 10: (3-6); the active group is at least one of amino and sulfonic acid group; the modified chitosan is sulfo-grafted chitosan, and the mass grafting rate is greater than 0.1 wt%. The preparation method has the advantages that the compatibility of a composition formula is improved through the modified ethylene composite copolymer and the modified chitosan, a uniform net structure is formed in a cross-linking reaction to serve as a supporting framework, the overall mechanical structure performance is enhanced through the bamboo fibers which are synergistically and uniformly distributed in the composition formula, and the degradable and non-toxic effects are achieved through the cooperation of the bamboo fibers and the TPS.

The invention belongs to the technical field of cable materials, and particularly relates to an anti-aging cable and a preparation method thereof. The anti-aging cable sequentially comprises a conductor, an insulating layer and a sheath layer from inside to outside, and the sheath layer is prepared from, by weight, 90-100 parts of PVC resin, 15-20 parts of linear low-density polyethylene, 10-15 parts of ethylene-octylene copolymer, 12-18 parts of plasticizer, 5-8 parts of anti-aging agent, 3-5 parts of calcium-zinc stabilizer, 3-5 parts of modified carbon nano tube and 2-3 parts of lubricant. Through molecular structure design, the prepared anti-aging agent not only can significantly improve the anti-aging performance of a cable sheath material, but also can effectively enhance the flame retardant property of the material. In addition, the modified carbon nanotube prepared by the invention can significantly improve the mechanical properties and waterproofness of the cable sheath material.

Disclosed are a high-strength high-elongation separator and a preparation method therefor. The high-strength high-elongation separator comprises ultra-high molecular weight polyolefin and a solubilizer, wherein the solubilizer is one of or a mixture of more of an ethylene-propylene copolymer, an ethylene-butylene copolymer and an ethylene-octene copolymer. The preparation method therefor comprises: mixing ultra-high molecular weight polyolefin, a solubilizer and a pore-forming agent, and stirring same until uniform, so as to obtain a premixed raw material; injecting the premixed raw material into an extruder, heating same to obtain a thermodynamic single-phase melt, and subjecting the thermodynamic single-phase melt to melt casting onto a cooling roller, so as to obtain a crystallized cast sheet; and subjecting the crystallized cast sheet to primary stretching and cooling to obtain a primary stretched film, subjecting the primary stretched film to secondary stretching to obtain a secondary stretched film, performing extraction and washing, and then drying same, so as to obtain a high-strength high-elongation separator. The preparation method utilizes the solubilizing effect of a copolymer and multiple operations of stretching performed in steps, and therefore the separator has good ductility and tensile strength.

The invention relates to a lightweight foaming sole material, which comprises the following raw materials by mass: 20-30% of a PA / EBA modified blend; 10% to 20% of a TPEE / EBA modified blend; 10%-30% of an ethylene-butyl acrylate copolymer (EBA); 8%-15% of an ethylene-octylene copolymer POE; 8%-15% of brominated butyl rubber BIIR; 2%-3% of talcum powder; 5%-10% of a coupling agent; 0.5%-1% of a lubricant; 1%-2% of a foaming aid; 0.3%-1% of a cross-linking agent; and 3%-7% of a foaming agent. The foaming sole material provided by the invention has the advantages of high elasticity, tear resistance and wrinkle resistance; the preparation method is simple and low in production cost, and has a wide application prospect in the field of foamed sole materials.

The invention discloses an impact-resistant cross-linked polyolefin composite cable material and a preparation method thereof, belongs to the technical field of cable material processing, and aims to solve the technical problem that the impact resistance and flame retardance of a cable material in the prior art need to be further improved. The flame-retardant polypropylene composite material specifically comprises the following components in parts by weight: 60-80 parts of modified polypropylene, 20-25 parts of a modified flame retardant, 5-8 parts of modified magnesium hydroxide, 10-15 parts of an ethylene-octylene copolymer, 1-2 parts of a chain extender, 0.5-1 part of an initiator and 8-12 parts of an auxiliary additive. The cross-linked polypropylene, the modified flame retardant, the modified magnesium hydroxide, the ethylene-octylene copolymer and the auxiliary additive are added into a double-screw extruder for melt extrusion and granulation to obtain the composite cable material, so that the impact resistance and flame retardance of the cable material are improved, and the toughness of the cable material is also improved.

The invention relates to the field of sole materials, in particular to a noctilucent sole material and a preparation method thereof. The noctilucent sole material is prepared from the following components in parts by weight: 100 parts of ethylene-vinyl acetate copolymer, 10 to 20 parts of ethylene-octylene copolymer, 6 to 18 parts of thermoplastic polyurethane elastomer, 2 to 10 parts of active noctilucent powder, 0.5 to 1.5 parts of lubricant, 0.5 to 1 part of cross-linking agent, 1 to 3 parts of foaming agent and 0.1 to 0.5 part of antioxidant. According to the present invention, the ethylene-vinyl acetate copolymer (EVA), the ethylene-octylene copolymer (POE) and the thermoplastic polyurethane elastomer (TPU) are adopted as the main materials, the active-treated noctilucent powder is adopted as the noctilucent material, and other auxiliary agents are added, such that the finally prepared sole material has advantages of light weight, high elasticity, uniform luminescence at night, and good thermal stability. The high-performance running shoe insole material has better aging resistance and wear resistance, and is suitable for high-performance running shoes.

The invention discloses a polypropylene insulating halogen-free low-smoke flame-retardant cable and a preparation method thereof, and the polypropylene insulating halogen-free low-smoke flame-retardant cable comprises a wire core conductor, an insulating layer and a protective sleeve which are sequentially arranged from inside to outside. The insulating layer or the protective sleeve is prepared from the following raw materials in parts by weight: 105-120 parts of polypropylene resin, 20-30 parts of an ethylene-octylene copolymer, 4-7 parts of nano silicon dioxide, 5-10 parts of a modified flame retardant and 3-5 parts of a lubricant; the modified flame retardant is prepared from an organosilane flame retardant, an organophosphorus flame retardant, aluminum hydroxide and a composite coupling agent. The polypropylene insulating halogen-free low-smoke flame-retardant cable prepared by the invention has more stable and more efficient flame retardance, better low temperature resistance and stronger ultraviolet resistance.

The invention provides a high-flame-retardant cable and a preparation method thereof, and belongs to the technical field of cables, and the preparation method comprises the following steps: S1, preparing an insulating layer-conductor material; s2, preparing an insulating layer-conductor filling composite material; and S3, putting an ethylene-vinyl acetate copolymer, an ethylene-octylene copolymer, a flame retardant and montmorillonite into the internal mixer, performing internal mixing and extrusion to obtain a sheath material, and sequentially coating the insulating layer-conductor filling composite material, the semi-conductive layer, the shielding layer and the sheath along the axial direction of the conductor to obtain the high-flame-retardant cable. According to the technical scheme provided by the invention, the purposes of good flame retardance and good smoke suppression performance of the cable are achieved.

The invention belongs to the technical field of photovoltaic packaging adhesive films, and provides an EVA photovoltaic packaging adhesive film and a preparation method and application thereof. The EVA photovoltaic packaging adhesive film is prepared from 85 to 100 parts of ethylene-vinyl acetate copolymer, 1 to 15 parts of PID (Potential Induced Degradation)-resistant master batch, 0.6 to 1.8 parts of cross-linking agent and 0.2 to 2 parts of auxiliary agent, wherein the anti-PID master batch is prepared from 50 to 100 parts of ethylene-octylene copolymer, 1 to 20 parts of modified MOFs (Metal-Organic Frameworks), 1 to 15 parts of compatibilizer and 1 to 15 parts of beta-cyclodextrin. According to the EVA photovoltaic packaging adhesive film, the aging resistance, the mechanical strength, the water resistance, the PID resistance and the like of the EVA photovoltaic packaging adhesive film can be improved when the EVA photovoltaic packaging adhesive film is applied to a photovoltaic module end, the power attenuation phenomenon caused by existing EVA photovoltaic adhesive films PID-p and PID-s is obviously reduced, the PID power attenuation phenomenon of the photovoltaic module is effectively reduced, the service life of a battery piece is prolonged, and the photoelectric conversion efficiency of the battery piece is improved.

The invention discloses a high-rigidity and high-toughness polypropylene composite material and a preparation method thereof, the high-rigidity and high-toughness polypropylene composite material comprises 55-70 g of homo-polypropylene, 10-20 g of anti-impact co-polypropylene, 18-25 g of surface modified talcum powder, 3-6 g of chopped glass fiber, 8-12 g of ethylene-octylene copolymer, 3-5 g of maleic anhydride grafted polypropylene, 0.5-1.0 g of polyethylene wax, and 0.3-0.5 g of an antioxidant 1010 and 168 (1: 1) mixture. The invention realizes the following effects: 1, a robust rigid-tough balance design: a reinforcing system with high-content talcum powder as a main body and low-content glass fiber as an auxiliary is adopted to cooperate with a POE (ethylene-octylene copolymer) flexibilizer, so that good low-temperature impact toughness is maintained while the bending modulus stably reaches 2500MPa or above; 2, interface compatibility optimization: the interface combination of the inorganic filler and the matrix is improved through PP-g-MAH, and the dispersity and the mechanical property stability are improved; and 3, process control: through optimized temperature and vacuum degree control, degradation is prevented, good performance reproducibility is ensured, and industrial production is easy.

The invention discloses a polyethylene composite material as well as a preparation method and application thereof, and belongs to the technical field of high polymer materials. The polyethylene composite material is prepared from the following components in parts by weight: 60 to 80 parts of bimodal high-density polyethylene, 2 to 5 parts of modified nano silicon dioxide, 6 to 15 parts of a modified ethylene-octene copolymer, 0.15 to 0.45 part of a composite antioxidant, 0.2 to 0.5 part of a light stabilizer, 0.5 to 1.5 parts of a composite lubricant and 0.05 to 0.1 part of a beta crystal form nucleating agent. The polyethylene composite material which is high in pressure resistance, long in service life and high in sag resistance is provided, so that the polyethylene composite material can be well suitable for high-pressure application scenes such as municipal water supply and drainage, fuel gas conveying and industrial pipelines when being used as a pipe.

The invention provides a polyethylene composite film. The polyethylene composite film comprises a surface layer, a middle layer and a heat sealing layer which are sequentially stacked, wherein the surface layer is composed of 58%-76% of hexene copolymerized metallocene linear low density polyethylene, 18%-37% of low density polyethylene and a small amount of slipping agent and anti-blocking agent; the middle layer is composed of 79%-88% of octene copolymerized metallocene medium density polyethylene, 5%-21% of hexene copolymerized metallocene linear low density polyethylene and 6%-15% of high density polyethylene; and the heat sealing layer is composed of 47%-65% of hexene copolymerized metallocene linear low density polyethylene, 33%-45% of low density polyethylene and 2%-5% of a tackifier. According to the composite film disclosed by the invention, through gradient design of each layer of material, the whole composite film has rigidity and toughness, and the composite film is particularly suitable for manufacturing stand-up bag packages which stand stably and are compression-resistant and impact-resistant.

The invention discloses an organic phosphorescent material intermediate for an OLED (Organic Light Emitting Diode) as well as a preparation method and application of the organic phosphorescent material intermediate, and relates to the field of organic phosphorescent materials. The intermediate is prepared through a Diels-Alder cycloaddition reaction between trans-cyclooctene and 3, 6-diphenyltetrazine, the reaction is carried out under the conditions that the temperature is 20-30 DEG C and the time is 10-30 minutes, and the mass ratio of the trans-cyclooctene to the 3, 6-diphenyltetrazine is 1: (1.0-2.5). Trans-cyclooctene is prepared by isomerizing cis-cyclooctene under the irradiation of 254nm ultraviolet light in the presence of a photosensitizer; the 2, 3, 6-diphenyl tetrazine is prepared by condensation, cyclization and purification of benzaldehyde and benzoyl hydrazine. The purity of the prepared intermediate reaches up to 99.2%, the yield reaches 82.4%, the intermediate serving as an OLED luminescent material has excellent thermal stability, and the quantum efficiency is still kept at 90.1% after HTHH treatment is conducted for 1000 h. The invention provides a new intermediate choice for developing a high-performance OLED (Organic Light Emitting Diode) material.

The invention discloses a high-toughness modified PPS engineering plastic and a preparation method thereof, and relates to the technical field of engineering plastics. The high-toughness modified PPS engineering plastic is prepared from the following raw materials in parts by weight: 40 to 60 parts of polyphenylene sulfide, 10 to 20 parts of maleic anhydride grafted ethylene-octylene copolymer, 5 to 15 parts of nano calcium carbonate, 10 to 20 parts of modified glass fiber, 0.5 to 2 parts of titanate coupling agent, 0.2 to 1 part of antioxidant 1010, 0.2 to 1 part of antioxidant 168, 0.5 to 2 parts of stearic acid, 0.5 to 2 parts of bisoxazoline and 10 to 20 parts of modified polyphenylene sulfide reinforcement. Through a ternary synergistic modification system and a gradient blending process, the bottleneck that toughness and rigidity of traditional PPS are difficult to consider at the same time is broken through, the preparation process is simple and controllable, the raw material cost is reduced compared with similar high-performance engineering plastics, and the high-performance engineering plastic is suitable for industrial large-scale production.