37 results about "Coordination polymerization" patented technology

This invention relates to the application of hypergravity technology in coordination polymerization, and discloses a method for preparing hyperbranched polyethylene and its application. The method includes: (1) carrying out coordination polymerization of ethylene monomer, solvent, catalyst solution, and auxiliary catalyst solution under hypergravity conditions; and (2) removing the monomer, washing, separating, and drying the reaction product obtained in step (1). By controlling the hypergravity level, reactant ratio, reaction temperature, and pressure, this invention can obtain high-quality hyperbranched polyethylene products with a number-average molecular weight of 1000-1500000 and a molecular weight distribution index of 1.2-2.5. Compared with reactions in ordinary polymerization reactors, the production efficiency is significantly improved, and the product has a higher molecular weight and a narrower molecular weight distribution.

The invention discloses a pyrolytic coordination polymer derived copper-rare earth diatomic catalyst as well as a preparation method and application thereof, and belongs to the technical field of catalytic materials. The preparation method comprises the following steps: firstly, constructing a formaldehyde-dicyandiamide-copper salt-rare earth salt quaternary coordination polymerization system, preparing a polymer precursor containing a metal-nitrogen coordination bond in situ, and realizing molecular-level uniform dispersion of copper and rare earth ions; and then coupling inert atmosphere pyrolysis and reducing atmosphere reduction processes, accurately constructing and stably anchoring copper-rare earth heteronuclear diatomic sites, and finally forming a target catalyst with the diatomic sites uniformly dispersed on the nitrogen-doped carbon carrier. When the material is used for a CO2 electrochemical reduction reaction, the methane Faraday efficiency reaches up to 78% under the current density of 400 mA cm <-2 >, and the stability is excellent; and in a wide current density interval of 200-600 mA cm <-2 >, the methane selectivity is stably maintained to be 60% or above. The process is simple and convenient, the cost is low, and an economic, reliable and large-scale technical scheme is provided for CO2 resource efficient conversion.

The application relates to a high-conductivity double-carbazole type two-dimensional conductive metal organic framework material, a preparation method and application thereof, and belongs to the field of metal organic framework materials. Three double-carbazole type two-dimensional conductive metal organic framework materials Cu-DCA-MOF, Cu-DCPy-MOF and Cu-DCPt-MOF are prepared, all of which have a special "rotor-stator" structure, and are obtained by coordination polymerization of double-carbazole type ligands and metal ions. Due to the special "rotor-stator" structure of the double-carbazole type ligands, the three materials have high crystallinity and high conductivity, and have important significance in enriching the types and structural diversity of two-dimensional conductive metal organic framework materials. In addition, the double-carbazole type two-dimensional conductive metal organic framework materials with high conductivity can be applied in potassium ion batteries, and provide a new idea and solution for the development of positive electrode materials of the potassium ion batteries.

Olefin coordination polymerization catalyst, wherein the catalyst consists of a primary catalyst mainly composed of a magnesium compound, a transition metal halide, a C 2-15 -alcohol and an electron donor in a molar ratio of 1:13-35:0.3-8.5:0.45-1.7, and a co-catalyst which is an organoaluminium compound, where the molar ratio of the transition metal halide to the co-catalyst is 1:10-500, wherein the electron donor is a four-armed organoheteroether compound, and the four-armed organoheteroether compound is selected from at least one of the following compounds wherein the magnesium compound is selected from magnesium dichloride or magnesium diethoxide and the transition metal halide is selected from titanium tetrachloride.

The invention relates to the technical field of nano materials, in particular to a preparation method of a Zn-based bimetal MOFs material and application of the Zn-based bimetal MOFs material as a medical drug carrying material. The preparation method comprises the following steps: preparing Zn, Mn and a ligand according to a molar ratio of 1: 1: (72-80), and mainly comprises the steps of preparation of metal salt solutions, coordination polymerization reaction, separation and purification, and drying. The process for preparing the Zn-based bimetallic MOFs material is simple and environmentally friendly, the obtained product has the excellent performance of being small in particle size, regular and stable, and the material loaded with doxorubicin hydrochloride has high loading rate and has potential clinical conversion value.

The invention discloses an S-type heterojunction nano catalytic material as well as a preparation method and application thereof. The S-type heterojunction nano catalytic material is prepared from a ZrO2 nano frame as a carrier; the CdS semiconductor nano-particles are loaded on the surface of the ZrO2 nano-frame; the iron-based polymer is constructed on the surfaces of the CdS semiconductor nanoparticles in situ in a coordination polymerization manner; the CdS semiconductor nanoparticles and the iron-based polymer are in close interface contact with the surface of the ZrO2 nano-frame, and an S-channel heterojunction is directly constructed and formed. The S-type heterojunction nano catalytic material can effectively promote spatial separation and directional migration of photon-generated carriers, obviously inhibit electron-hole recombination, is beneficial to multi-electron reduction reaction of CO2, can highly selectively reduce CO2 into carbon monoxide, obviously inhibits hydrogen evolution side reaction, and improves the catalytic efficiency of the carbon monoxide. The method is suitable for the fields of visible light driven CO2 resource utilization, clean energy conversion and the like, and has a good application prospect.

The application discloses a reactive macromolecular dielectric reinforcing agent, a polypropylene composite material and preparation and application thereof. The application prepares an activated macromolecular dielectric reinforcing agent through a free radical polymerization reaction of an acrylamide type polar monomer, wherein 1,3-butadiene is used for end capping; then, the activated macromolecular dielectric reinforcing agent is reacted with ethylene to obtain a reactive macromolecular dielectric reinforcing agent. The application also adds the reactive macromolecular dielectric reinforcing agent into a polypropylene polymerization reaction to prepare a polypropylene composite material with a high dielectric constant through coordination polymerization. The application macromolecularizes an amide group, can obviously improve the compatibility of a polar group amide group and non-polar polypropylene, solves the problems of precipitation, dispersion and uneven dispersion of the polar group amide group in a polypropylene matrix, endows the polypropylene composite material with the characteristics of high efficiency and durability of dielectric properties, and is suitable for being used in related products, such as thin film capacitors and lithium battery separators, which need a high dielectric constant.

This invention discloses a Pb(II) coordination polymer catalytic electrode, its preparation method, and its application, belonging to the field of flow battery electrode materials and electrochemical energy storage technology. The catalytic electrode uses an acid-washed carbon felt electrode as a substrate, and nanoscale Pb-based polymers are grown in situ on the surface of the carbon felt substrate via ultrasonic chemical deposition. 2+ A polymer catalyst layer formed by coordination polymerization with nitrogen-containing organic ligands. The preparation method involves acid washing pretreatment of the original carbon felt electrode, mixing lead source solution and iodine source solution under ultrasonic conditions to obtain a lead-containing intermediate reaction system, then placing the acid-washed carbon felt electrode in the lead-containing intermediate reaction system, adding a nitrogen-containing organic ligand solution, and then in-situ polymerizing the Pb(II) metal-organic coordination polymer on the carbon felt fiber surface under ultrasonic conditions. This catalyst electrode can improve the effective active area and mass transfer accessibility of the electrode, maintain good structural stability under acidic conditions, and enhance the coulombic efficiency and long-term cycling stability of iron-chromium redox flow batteries.

The invention relates to a stabilizer for odorless artificial leather, a preparation method of the stabilizer, a coating laminating material composition for PVC artificial leather, a corresponding coating laminating material for the PVC artificial leather and the PVC artificial leather. The preparation method comprises the following steps: selecting an alpha-olefin dimer from a polyolefin coordination polymerization light component byproduct, designing and synthesizing a polyol ester stabilizer with a branched long carbon chain on the basis of the alpha-olefin dimer, and reacting with zinc acetate to introduce Zn < 2 + > to form a coordinate bond with hydroxyl to prepare the alpha-olefin dimer-polyol ester-zinc composite stabilizer. Wherein the alpha olefin dimer has a branched non-polar carbon chain structure and is used for reducing the degree of crystallinity of PVC, the alpha olefin dimer is matched with the isophthalate plasticizer for use, so that the low-temperature flexibility of the PVC composite resin can be improved, the alpha olefin dimer is used as a resin bonding agent for PVC artificial leather, the polyhydric alcohol part is chelated with Zn < 2 + > and is used for absorbing HCl released by PVC, and the stability of a PVC product is improved. Meanwhile, the molecular weight and boiling point of the polyol ester stabilizer are higher, and the polyol ester stabilizer has lower odor.

The invention discloses a multi-element energy storage aggregation dynamic optimization method and apparatus, and an electronic device. The method comprises the steps of obtaining target parameter data sorted based on a time sequence; based on the target parameter data, calculating an influence factor of the current moment on the target parameter of the next moment; based on the influence factor, the absolute error between the photovoltaic output of the sending-end power grid at the first moment and the local load, and the load energy state parameters under the first voltage level and the second voltage level at the first moment; determining an absolute error between the photovoltaic output of the sending-end power grid at the next moment of the first moment and a local load and load energy state parameter predicted values under the first voltage level and the second voltage level; and calculating an index prediction value of the multi-level power grid multi-element energy storage energy coordination aggregation demand at the next moment based on the prediction value. The photovoltaic power supply and load fluctuation of the power grid can be predicted, so that the energy storage load state of the power grid is adjusted, and the stability of energy coordination of each stored energy of the multi-stage power grid is ensured.

The invention relates to a metal organic framework (MOF) modified composite ultrafiltration membrane and a preparation method thereof. The method comprises the following steps: sequentially immersing a base membrane in a zirconium metal precursor solution and an amino ligand solution, realizing in-situ growth of UiO-66-NH2 on the base membrane through a coordination polymerization reaction, and then carrying out surface chemical grafting by utilizing a polycarboxylic acid activator solution to prepare the UiO-66-NH2-g composite ultrafiltration membrane. According to the invention, a functionalized UiO-66-NH2 structure is introduced into a membrane matrix and is covalently connected with a polycarboxyl ligand, so that the chelating removal capability on divalent heavy metal ions in water is remarkably enhanced on the basis of maintaining relatively high water flux. The method effectively solves the problem that heavy metal is difficult to remove due to the fact that the aperture of a traditional ultrafiltration membrane is not matched with the size of metal ions, and collaborative improvement of the water flux and the heavy metal removal performance is achieved.

The application relates to a butanedione ligand compound, a metal complex of the butanedione ligand compound, a metal catalyst composition and application thereof, and belongs to the technical field of catalysts. The ligand compound has a structural formula shown in formula I, wherein R1, R2, R3, R4 and R5 are independently selected from hydrogen, halogen, substituted or unsubstituted C1-C 30 alkyl, substituted or unsubstituted C6-C 30 aryl, substituted or unsubstituted C3-C 30 heterocyclyl, substituted or unsubstituted C1-C 30 alkoxy, substituted or unsubstituted C6-C 50 fused ring group; when the alkyl, aryl, heterocyclyl or fused ring group is substituted, the substituent is at least one selected from C1-C 60 alkoxy, C1-C 60 alkyl, C1-C 60 fluoroalkyl, nitro and halogen. The butanedione ligand compound of the application selects the skeleton with a Lewis base of butanedione to control the steric hindrance, and the butanedione has a strong electron-withdrawing effect, which is beneficial to the coordination polymerization of subsequent olefin monomers.

The invention discloses a method for obtaining different polar monomer copolymers and homopolymers through a catalyst composition, and particularly provides a catalyst composition composed of alkyl aluminum, organic boron salt and a catalyst. The composition can catalyze a block copolymerization reaction between a polymer with a repetitive unit as shown in a formula IV and a compound M to obtain a block copolymer III, the compound M can also be catalyzed to be subjected to polymerization reaction to obtain a polymer I with a repetitive unit as shown in the formula A. According to the method, coordination polymerization of polar monomers can be efficiently catalyzed, the used catalyst is high in stability, and the homopolymer and the block copolymer which are clear in structure can be obtained at high yield; the obtained polymer has a high glass transition temperature, and part of the polymer presents a dual glass transition behavior. .

This invention belongs to the field of olefin polymerization and relates to a conjugated diene coordination polymerization system and its application. It includes a cobalt compound (A), an organoaluminum compound (B), a silicon-containing compound (C), a conjugated diene monomer (D), and a solvent (E). In this cobalt-based catalytic conjugated diene polymerization system, the silicon-containing compound acts as both a catalyst component and participates in the polymerization reaction, effectively improving the catalytic activity of the polymerization reaction and allowing for adjustment of the microstructure content within a certain range.

The invention provides a 1, 1-disubstituted olefin anhydride product as well as preparation and application thereof. According to the present invention, the 1, 1-disubstituted olefin anhydridization product is obtained through the cyclic reaction of 1, 1-disubstituted olefin and maleic anhydride, and the 1, 1-disubstituted olefin comprises the light component by-product alpha olefin coordination oligomer formed during the coordination polymerization process of alpha olefin, such that the application field of the alpha olefin coordination oligomer is expanded, and the utilization value of the alpha olefin coordination oligomer is improved.

The application discloses a reactive macromolecular dielectric reinforcing agent, a polypropylene composite material and preparation and application thereof. The unsaturated carboxylic acid and the acrylamide polar monomer are polymerized to obtain the activated macromolecular dielectric reinforcing agent with high polarity; then the reactive macromolecular dielectric reinforcing agent is obtained by polymerizing with ethylene. The reactive macromolecular dielectric reinforcing agent is added into the polypropylene polymerization reaction to prepare the polypropylene composite material with high dielectric constant by coordination polymerization. The macromolecular dielectric reinforcing agent is realized, the uniformity and regularity of the polar group carboxyl and amide group distributed on the polypropylene molecular segment are improved, and the polypropylene composite material is endowed with the characteristics of high efficiency and durability of dielectric properties.

The invention relates to the technical field of nanofiber thin film materials, in particular to a preparation method of a flower-shaped metal organic framework compound high-temperature-resistant composite filter membrane. The preparation method comprises the following steps: (1) preparing a polyimide nanofiber film through electrostatic spinning; (2) interface adhesion of a metal ion-polyphenol network; (3) preparing a polyimide grafted ZIF-8 composite film; (4) soaking the polyimide nanofiber film prepared in the step (3) in a zinc nitrate aqueous solution, stirring at normal temperature, washing away redundant zinc ions, and continuously soaking in a low-concentration aqueous solution of 2-methylimidazole for coordination polymerization; and (5) repeating the steps (3)-(4) for multiple times, so that the ZIF-8 crystals grow on the surfaces of the fibers in situ in a flower-like form, and the high-temperature-resistant composite filter membrane is prepared. The composite filter membrane prepared by the preparation method is resistant to high temperature and uniform in gap distribution, the filtering efficiency reaches 99.98% or above, the piezoresistance is lower than 150 Pa, and the application effect in the field of filtering separation is remarkable.

The invention discloses a method for covalently binding a double-bond-containing metal coordination polymer with sulfur molecules and application of the double-bond-containing metal coordination polymer in a positive electrode of a lithium-sulfur battery, and belongs to the technical field of lithium-sulfur batteries. The preparation method comprises the following steps: reacting acryloyl chloride with amino groups on tetraaminobenzene to obtain double-bond modified BTA molecules, adding bacterial cellulose turbid liquid, then adding a nickel chloride hexahydrate aqueous solution, stirring, dropwise adding stronger ammonia water to initiate coordination polymerization, washing and freeze-drying to obtain BTA-ACry-Ni-coated BC aerogel; and enabling elemental sulfur and the BTA-ACry-Ni-BC aerogel to trigger sulfur vapor molecule ring opening at a high temperature under the condition that the elemental sulfur and the BTA-ACry-Ni-BC aerogel are not in contact with each other, and then reacting with double bonds to obtain the BTA-ACry-Ni-BC-S composite material covalently bound with sulfur molecules. The prepared sulfur covalent binding metal coordination polymer plays an important role in inhibiting dissolution of polysulfide and accelerating conversion of active substances, and is beneficial to preparation of advanced energy storage devices with large energy storage capacity, high coulombic efficiency and long cycle life.

The invention discloses a preparation method of an electronic-grade high-purity nickel aminosulfonate solution, which comprises the following steps: preparing a functional composite membrane: taking a porous polysulfone support membrane as a substrate, and forming a boron-nitrogen coordination polymer coating on the surface of the porous polysulfone support membrane through interfacial polymerization; then, a graphite-like phase carbon nitride layer grows on the surface of the coating through in-situ roasting; then grafting a phosphorus-sulfur synergistic chelating agent to the surface of the coating through ester exchange reaction; and finally, spraying fluorine modified silane and carrying out activating treatment to obtain the functional composite membrane. Carrying out integrated refining; regenerating and recycling the membrane; according to the preparation method disclosed by the invention, the fully non-metallic element functional composite membrane consisting of the boron-nitrogen coordination polymer, the graphite-like carbon nitride photocatalytic layer, the phosphorus-sulfur synergistic chelating agent and the fluorinated layer is innovatively designed and prepared and is combined with a customized integrated refining process; and synchronous and deep removal of various different-property impurities in a single process is realized.

The present application relates to a kind of preparation method and slow-release bacteriostatic application of pentazocine coordination polymer.The coordination polymer is with zinc as central metal, ligand is pentazocine and HCOO-R-COOH, wherein, R is selected from at least one of benzene ring, heterocycle and aliphatic group, constitute double-ligand type coordination polymer.A kind of preparation method of coordination polymer, it is the preparation method of any above-mentioned coordination polymer.Zinc salt, the HCOO-R-COOH and the pentazocine are sequentially added in DMF aqueous solution, under the condition of 0~200 ℃ oil bath, stirring 0.1~72 h, obtain the coordination polymer.The zinc salt includes at least one of zinc chloride, zinc sulfate and zinc nitrate.The coordination polymer of the present application has super high fungicide load, has excellent bactericidal effect and better ultraviolet light stability, shows double response release in the aspects of pH value and temperature.

The invention discloses a sensing platform based on an Eu-MOF metal organic framework and application of the sensing platform in visual detection of cortisol, the sensing platform contains a multi-emission fluorescent probe based on the Eu-MOF metal organic framework, and the fluorescent probe is obtained by coordination polymerization of 1, 3, 5-tri (4-carboxyphenyl) benzene and EuCl3. 6H2O; the red fluorescent material has the characteristic of generating dual emission at 454 nm and 615 nm under single-wavelength excitation (338 nm) so as to display red fluorescence. When cortisol is added into a sensing platform, the cortisol and the Eu-MOF metal organic framework form a compound, so that red fluorescence at 615 nm is reduced, blue fluorescence at 454 nm is gradually increased, a clear color change from red to blue is presented, corresponding color information can be identified through intelligent equipment, and then visual detection of the cortisol is realized. A novel sensing platform is provided for non-invasive measurement of the cortisol marker in the body fluid.

The invention relates to the technical field of oil product drag reducer preparation, in particular to a drag reducer and a preparation method and application thereof. The preparation method of the drag reducer comprises the following steps: by taking an alpha-olefin monomer and a silicon-based compound containing double bonds on the surface as raw materials, titanium tetrachloride as a main catalyst and aluminum alkyl as a cocatalyst, carrying out coordination polymerization reaction to form a copolymer of the alpha-olefin monomer and the silicon-based compound containing double bonds on the surface, thereby obtaining the drag reducer. The silicon-based compound with the double bonds on the surface and the alpha-olefin monomer are subjected to coordination copolymerization reaction, the double bonds contained in the silicon-based compound with the double bonds on the surface can promote smooth proceeding of the copolymerization reaction, and in addition, the silicon-based compound with the double bonds on the surface contains Si-O-Si bonds with large steric hindrance; the drag reducer can effectively avoid the poisoning effect of oxygen atoms on a catalyst, has rigidity, and effectively enhances the thermal stability and drag reduction effect of the drag reducer.

The invention discloses a method for synthesizing cerium-based metal organic framework nano-enzyme at low temperature, and relates to the technical field of metal organic framework materials and nano-enzyme synthesis. Preparing a Ce (NO3) 3 solution and an H3BTC solution; the Ce (NO3) 3 solution and the H3BTC solution are fully mixed and then placed in an environment with the temperature ranging from-80 DEG C to-10 DEG C for coordination polymerization-nucleation-growth; after coordination polymerization, nucleation and growth are completed, room-temperature unfreezing is conducted, precipitates are separated from a reaction solution through centrifugal operation after unfreezing, and the cerium-based metal organic framework nano-enzyme is obtained through washing and drying. The synthesis of the metal organic framework material can be completed through low-temperature standing, zero heating and zero high pressure are realized in the whole process, the energy consumption and the safety risk are synchronously reduced to the minimum, and the realization is simple; and an ultrasonic probe, a microwave cavity or vacuum / electrolysis equipment is not needed, so that the investment and operation cost is remarkably reduced.

The invention discloses a method for realizing large-scale rapid synthesis of a metal organic framework by using an electron beam irradiation technology, and belongs to the technical field of radiation chemistry and porous material preparation. Under the conditions of normal temperature and normal pressure, metal salt and a corresponding organic ligand are added into an organic solvent and are mixed according to a set proportion; then, electron beam irradiation is directly accepted, so that the system completes coordination polymerization reaction within a second level, and the efficient large-scale preparation of the metal organic framework material is realized. According to the method, pH adjustment and use of a high-temperature and high-pressure reaction kettle are not needed, the reaction condition is mild, a large-volume precursor system can be continuously treated, and the actual productivity of the metal organic framework is remarkably improved. The method disclosed by the invention has the remarkable advantages of high reaction speed, low energy consumption, simplified process, high yield, capability of realizing gram-level and larger-scale continuous synthesis and the like, and a brand-new technical route is provided for industrialization and green manufacturing of the metal organic framework material.

The invention discloses a bio-based chiral carbon dot as well as a preparation method and application thereof, and belongs to the technical field of asymmetric catalysis. The preparation method of the bio-based chiral carbon dots comprises the following steps: dispersing chiral amino acid and a rhodium metal complex in deionized water for hydrothermal reaction, cooling after the reaction is finished, filtering, and removing a solvent to obtain the bio-based chiral carbon dots. The transition metal element (Rh) is doped into the carbon dots (CDs), and the catalytic performance can be remarkably enhanced by adjusting the electronic structure and surface active sites of the carbon dots. Monomer coordination polymerization can be achieved through surface active sites, helical conformation of a polymer chain can be induced through a chiral microenvironment, and precise regulation and control of stereoselectivity of the polymerization reaction are achieved. The bifunctional carbon dot system provides a new thought for green synthesis of chiral high polymer materials, and particularly shows potential in the field of asymmetric catalysis.

The invention relates to the technical field of denitration catalytic materials, and discloses a preparation method of a denitration catalytic material special for emission of a methanol internal combustion engine, and the preparation method comprises the following steps: S1, preparing a multi-element synergistic precursor mixed solution: sequentially mixing a carrier precursor, an active metal salt, a main ligand, a double-dynamic auxiliary ligand and a coordination regulator to obtain the multi-element synergistic precursor mixed solution; adjusting the pH value, and stirring to obtain a transparent and uniform multi-element synergistic precursor mixed solution; s2, gradient coordination polymerization reaction: putting the multi-element synergistic precursor mixed solution into a closed high-pressure reaction kettle, and reacting by adopting a stepped heating polymerization process to obtain an integrated gel product; s3, doping gas assisted low-temperature plasma activation; and S4, surface acid-base modification post-treatment. Through the synergistic effect of the double-dynamic auxiliary ligand and the coordination regulator, the gradient coordination polymerization process is matched to regulate and control the precursor structure, the reaction induction period is shortened, the NO conversion rate in the low-temperature interval is increased, and the problem that the low-temperature exhaust denitration reaction speed of the methanol internal combustion engine is low is solved.

The invention provides a Cu single-site coordination polymer catalyst as well as a preparation method and application thereof, and the Cu single-site coordination polymer catalyst is obtained by carrying out coordination polymerization reaction on 2-methylimidazole serving as a ligand and bivalent copper salt by adopting a hydrothermal method. The Cu single-site coordination polymer catalyst disclosed by the invention has the advantages of good catalytic activity and high acetic acid selectivity in preparation of acetic acid by electroreduction of carbon monoxide.

The invention relates to a high-performance hydrogenated butadiene-isoprene elastomer as well as a preparation method and application thereof. The invention belongs to the field of polyolefin elastomer preparation. The number-average molecular weight of the elastomer is 10,000-7,000 g / mol, the molecular weight distribution is 1.0-5.0, the hydrogenation degree is greater than 90%, the glass transition temperature range is-80 to-20 DEG C, the shore hardness A is greater than 40, the tensile strength is greater than 10 MPa, the elongation at break is greater than 270%, the 300% stress at definite elongation is greater than 12 MPa, and the tear strength is greater than 20 N / mm. After the copolymer is obtained through a coordination polymerization system, the Wilkinson catalyst is used as a hydrogenation catalyst to perform double-bond hydrogenation on the copolymer, and a novel hydrogenation material obtaining way is provided. The molecular chains of the hydrogenated elastomer are all composed of C-H single bonds, the structure is similar to that of ethylene propylene rubber, the elastomer can be used as ethylene propylene rubber, and the application prospect is wide.

A supported metallocene catalyst, a preparation method therefor and the use thereof, belonging to the field of olefin coordination polymerization catalysts. In the present invention, a supporter is dispersed in an inert organic solvent, and in the inert organic solvent containing the supporter, a metallocene catalyst is synthesized in situ and is supported in situ, wherein the supporter is in contact with the metallocene catalyst, so that the metallocene catalyst is firmly supported on the surface of the supporter; an alkyl(alkoxyl)aluminum solution having a novel structure, which is produced by a contact reaction of an alkyl aluminum solution and an aqueous solution of toluene, is added, and said alkyl(alkoxyl)aluminum solution having the novel structure comes into contact with the in-situ-supported metallocene catalyst, so as to obtain an efficient supported metallocene catalyst, the supporter being silica gel, magnesium chloride and the like, or a mixture thereof in any ratio. The catalyst prepared by the present invention has regulatable activity within 7000-25000 gPE / (gcat.2h), is adaptive to a polymerization temperature of 20-200°C, and can possess relatively high activity even if the polymerization temperature is as high as 170°C, and achieves high thermal stability.

This invention belongs to the field of polyolefin preparation technology, and particularly relates to an olefin polymerization method and a polyolefin. The method includes: (1) coordination polymerization of olefin monomers or comonomers in the presence of a polymerization catalyst and hydrogen; (2) a deep polymerization reactor connected in series at the end of the polymerization reactor in step (1), wherein the material at the outlet of the polymerization reactor in step (1) is introduced into the deep polymerization reactor and a catalyst modifier is added therein to continue deep polymerization to produce ultra-high molecular weight components and obtain polyolefins; the length-to-diameter ratio of the deep polymerization reactor is 2-15, and it is equipped with a stirring blade assembly; the phase of each stirring blade assembly is staggered from the phase of the next stirring blade assembly along the axis; the blade width is 50-600 mm. This invention improves the performance of polyolefin products and can utilize an additional 1%-30% of the catalyst efficiency, avoiding resource waste.