67 results about "Grubbs' catalyst" patented technology

The invention belongs to the technical field of liquid crystal polymer materials, and particularly relates to a side chained linear azobenzene liquid crystal polymer material and a preparation method thereof. In the method, a novel liquid crystal polymer material using butadiene-ethylene-functional group substituted ethylene ternary alternative polymer as a main chain and the azobenzene derivative as a side chain structure is synthesized by using an open loop translocation polymerization method through using a 5-substituted cyclooctene (a substituent group is an azobenzene derivative) monomer in the presence of a Grubbs catalyst. According to the invention, the problem that the conventional azobenzene liquid crystal elastomer material is insoluble and is not molted so as not to be prepared by adopting a common machine shaping method. Under the condition of no cross-linked network structure, the side chained linear azobenzene liquid crystal polymer material has the rubber elasticity and good optical response characteristic; and the side chained linear azobenzene liquid crystal polymer material can machined to form liquid crystal polymer materials, such as films and fibers, after molten or dissolved without being limited in machining size and appearance and can be recycled for re-machine shaping after machine-shaping, and is a novel low-carbon and environment-friendly optical response liquid crystal polymer material.

The invention relates to a bionic self-healing material for air leakage stoppage in a coal mine. The bionic self-healing material comprises a fast-setting expanding material, microcapsules containing a healing agent, and a catalyst, wherein the fast-setting expanding material comprises several of a cement clinker, coal ash, steel slag, mountain flour, salty mud, carbide slag, an expanding agent, a water reducing agent and sand, and each microcapsule is composed of a wall material (polymer resin) and a core material (the healing agent); the wall material of each microcapsule is at least one of urea resin, melamino-formaldehyde resin, melamine urea-formaldehyde resin and polyurethane, the healing agent is at least one of olefins containing double bonds, such as polyurethane prepolymer, isocyanate, phenolic resin, epoxy resin, styrene, acrylics and dicyclopentadiene (DCPD), and the catalyst is at least one of Grubbs catalyst, dibutyltin dilaurate and amines. The bionic self-healing material for air leakage stoppage in the coal mine disclosed by the invention has the advantages of being automatic in detection and healing, moderate in expansion, fast to set, good in conveying performance, strong in setting performance, green and environmentally friendly, and low in price.

The invention discloses a cable insulation material with a self-repairing function. The cable insulation material is composed of the following components in parts by weight: 100 parts of low density polyethylene, 2-4 parts of vinyl trimethoxy silane, 0.08-0.2 part of tert-butyl peroxy-3,5,5-trimethylhexanoate, 0.4-1.2 parts of 1801 organic stearic acid, 1.5-4 parts of dibutyltin dilaurate, 1.5-4.5 parts of zinc oxide, 1.8-3.2 parts of 1010 antioxidants, 1-5 parts of microcapsules prepared by a urea resin coated dicyclopentadiene system and 0.02-0.03 part of a Grubbs catalyst. According to the cable insulation material with the self-repairing function disclosed by the invention, due to the effects of the microcapsules prepared by the urea resin coated dicyclopentadiene system and the Grubbs catalyst in the formula, a self-repairing crosslinked polyethylene cable insulation material in the invention has excellent performance of repairing electric tree defects.

The invention provides a cross-linkable high dielectric norbornene copolymer. The cross-linkable high dielectric norbornene copolymer comprises a norbornene block copolymer which is formed by ring-opening metathesis polymerization of an endo-configuration norbornene monomer or an exo-configuration norbornene monomer and an exo-configuration oxa-norbornene monomer. The invention also provides a preparation method of the norbornene copolymer. According to the preparation method, the norbornene copolymer is obtained by ring-opening metathesis polymerization reaction of the endo-configuration norbornene monomer or the exo-configuration norbornene monomer and the exo-configuration oxa-norbornene monomer under the action of a Grubbs catalyst. The invention further provides a three-dimensional cross-linked network polymer formed by crosslinking of the norbornene copolymer and a preparation method thereof. The norbornene copolymer has a relatively high dielectric constant and very low dielectric loss. The preparation method of the norbornene copolymer is simple and practicable. The norbornene cross-linked polymer has relatively high dielectric constant and thermal stability, and the applied range of the norbornene crosslinked polymer in the field of thin-film capacitors is expanded.

The invention discloses a self-healing material which is mainly prepared from a porous material, paraffin, a polymer composite material, dicyclopentadiene liquid and a Grubbs' catalyst, wherein the polymer composite material is prepared from carbon, glass and resin. The porous material fully absorbs the dicyclopentadiene liquid, the porous material containing the dicyclopentadiene liquid is wrapped in the paraffin to be prepared into microcapsules, the microcapsules are doped into the polymer composite material containing the Grubbs' catalyst, and the self-healing material is obtained. The self-healing material has the advantages that cost is low, the manufacturing technology is simple, and the self-healing performance is remarkable.

The application discloses a self-repairing optical cable reinforced core containing microcapsules and a preparation method. The self-repairing reinforced chip is formed by mixing microcapsules, catalysts and an unsaturated polyester and covers an aramid fiber surface through a pultrusion process. The material of the reinforced core is aramid fibers, and the mass ratio of the microcapsules to the unsaturated polyester in the mixture is 5% to 15%; and shell capsule walls of the microcapsules are urea resins,inner capsule cores are dicyclopentadiene, and the mass ratios of the capsule cores to the capsule walls are 5:1. When the surface of the aramid fiber reinforced core cracks, the microcapsules are broken, dicyclopentadiene rapidly permeates crazing, and meets the Grubbs catalysts to produce cross-linking, thereby achieving the purpose of repairing. Thus the service life of an optical cable core is prolonged, and the self-repairing optical cable reinforced core is suitable for novel industrial production.

The invention discloses a method for preparing a polyimide film with low surface energy. The method comprises the following steps of reacting aromatic diamine containing a norbornene structure with aromatic tetracarboxylic acid dianhydride at room temperature, coating a film and baking to obtain polyimide film, and then in the presence of the Grubbs catalyst, initiating perfluoroalkyl esterification of norbornene by virtue of a surface initiated polymerization ring-opening metathesis polymerization method to prepare the polyimide film with low surface energy. The polyimide film with low surface energy prepared by the method has the characteristics of good film-forming property, optical transparency and heat resistance. The film can be used as anti-oil creeping, anti-fouling and self-cleaning materials.

The invention provides a norbornene imide heat-resistant polymer porous material and its preparation method. The method comprises the following steps: Step 1, a norbornene imide monomeric compound is prepared from norbornene anhydride and a multi-element organic amine compound by a one-step method or a two-step method, and the norbornene imide monomeric compound is purified; Step 2, the purified product obtained from the step 1 is dissolved in an organic solvent b, temperature is maintained at minus 10-100 DEG C, a Grubbs catalyst is added to carry out a polymerization reaction at the reaction temperature of minus 10-120 DEG C for 5 minutes-2 weeks; and Step 3, aftertreatment is carried out to obtain the heat-resistant polymer porous material.

The invention discloses an organic molecular cage loaded catalyst and a synthesis method thereof. The method includes: firstly synthesizing an organic molecular cage loaded catalyst precursor, then using a Grubbs catalyst to conduct catalytic crosslinking, and carrying out hydrolysis and azidation to synthesize an azide group containing organic molecular cage, and finally carrying out click chemical reaction to connect catalytic groups of different catalytic properties. The invention also puts forward application of the organic molecular cage loaded catalyst respectively in catalysis of oil soluble organic reaction in an aqueous solution, catalysis of ''one nest method'' tandem reaction, and Pd loaded load catalysis of Suzuki-Miyaura coupling reaction.

The invention belongs to the field of batteries, and particularly relates to a lithium ion battery. The lithium ion battery comprises a positive electrode, a negative electrode, a diaphragm and electrolyte, the diaphragm comprises a base membrane and a coating formed on at least part of the surface of the base membrane, a coating material of the coating comprises core-shell structure microspheres,each core-shell structure microsphere comprises an inner core and an outer shell coating the inner core, the inner core comprises a Grubbs' catalyst, and the electrolyte comprises a polyfunctional monomer. The lithium ion battery provided by the invention can be used for efficiently and rapidly curing commercial liquid electrolyte under an overheating condition (such as 90 DEG C); therefore, further internal short circuit and thermal runaway of the lithium ion battery under an overheat condition are avoided, the safety of the lithium ion battery is guaranteed, and meanwhile, influence on theenergy density of the lithium ion battery is extremely small, so that the contradiction between the energy density and the safety of the lithium ion battery is overcome.

The invention relates to a method for synthesizing 2H-azirine amide. 5-aminoisoxazole as a raw material is added to a reaction solvent, the Hoveyda-Grubbs Catalyst is then added, the materials are subjected to a catalytic reaction under green light illumination, the reaction solvent is removed from an obtained reaction liquid, the liquid is purified, and a product is obtained. The synthesis methodadopts quite mild required conditions and is green and high in yield, and the range of applicable substrates is wide, for example, various substituted phenyl groups, heterocyclic rings, olefins and alkanes can be adopted in the 2nd position of a three-membered ring of 2H-azirine amide, methyl, allyl, phenyl and 1-phenyl allyl groups can be adopted in the 3rd position, and arene, alkane or acyl substituted amine can be adopted for amide.

The invention relates to a preparation method of terminal group functionalized hyperbranched polyolefin. The preparation method comprises the following steps: taking 3-allyl-cyclooctene as a monomer, introducing a plurality of olefins with terminal functional groups as chain transfer agents, and directly obtaining end group functionalized polyolefin through simultaneous occurrence of ring-opening metathesis polymerization reaction and cross metathesis reaction in the presence of a plurality of Grubbs catalysts. Compared with the prior art, the preparation method disclosed by the invention has the advantages that the preparation of hyperbranched polyolefin and the functionalization of the end group of the hyperbranched polyolefin can be simultaneously realized through a one-pot method; and the reaction conversion rate, the product structure, the type and number of end group units and the like are controlled by means of catalyst selection, monomer concentration change, chain transfer agent type and concentration change, reaction temperature and time control and the like.

The invention discloses preparation of a loaded Grubbs catalyst and application of loaded Grubbs catalyst. The preparation is characterized in that: the catalyst is obtained by using the compound obtained by the amidation reaction of 3-3-ethenyl-4-isopropoxyphenyl-propionic acid as a loading precursor and then enabling the compound to carry out exchange complexation respectively with phenyl methylene-bistricyclohexylphosphine-dichlororuthenium or 1, 3-bis 2, 4, 6-trimethylphenyl-2-imidazolidinylidene-dichorobenzenemethylene-tricyclohexylphosphineruthenium; the catalyst is used for the olefin metathesis reaction of N,N-diallyl-4-methylbenzenesulfonamide and has quite strong catalytic activity. Compared with the prior art, the catalyst of the invention is simple in process and convenient in preparation, and can be recycled many times and keep excellent catalytic activity, thereby greatly reducing the heavy metal pollution caused by Grubbs type catalysts to the product of olefin metathesis reaction and developing a new way for green and environmentally-friendly organic synthetic chemistry.

The invention discloses a method for preparing polyolefin by metal-catalyzed ring-opening metathesis polymerization, which comprises the following steps: (1) dissolving norbornene monomers in a solvent to prepare a monomer solution A; (2) dissolving a Grubbs catalyst in a solvent to prepare a catalyst solution B; and (3) in a microchannel reaction device, simultaneously pumping the monomer solution A and the catalyst solution B into a microreactor provided with a spherical internal component, reacting, collecting a reaction solution, separating and purifying to obtain polyolefin. According to the invention, the sphere is placed in the microreactor as an internal component, so that Poiseuille flow in the pipeline is effectively improved, the mass and heat transfer efficiency is improved, the polymerization rate is increased, the space-time control of the reaction in the pipeline is enhanced, and the high-molecular-weight narrow-distribution polyolefin is efficiently prepared. Meanwhile, a brand new thought is provided for polymerization reaction process control, and the method has important industrial application value.

Provided is a process of making a polyphenylene oxide prepolymer, comprising a step of reacting a reactive cycloolefin and a vinyl-containing polyphenylene oxide in the presence of a ruthenium catalyst. The reactive cycloolefin may be selected from dicyclopentadiene monomer, dicyclopentadiene oligomer, dicyclopentadiene polymer, norbornene monomer, norbornene oligomer, norbornene polymer, and a combination thereof; the vinyl-containing polyphenylene oxide may be selected from divinylbenzyl polyphenylene oxide resin, vinylbenzyl-modified polyphenylene oxide resin, methacrylic polyphenylene oxide resin, and a combination thereof; the ruthenium catalyst may be a Grubbs catalyst. Also provided are a polyphenylene oxide prepolymer made by the process, a resin composition containing the polyphenylene oxide prepolymer, and a product made from the resin composition.

The invention belongs to the technical field of marine organism lossless protection, and particularly relates to an amphoteric-polymer-based marine antifouling surface and a preparation method thereof. The method includes the steps: designing and preparing a monomer of an amphoteric ion with a norbornene structure; initiating and grafting an amphoteric-polymer on the surface of modified polydimethylsiloxane by a surface initiation ring-opening metathesis polymerization method under catalyzing of a Grubbs catalyst to obtain the antifouling surface. The antifouling surface is simple and convenient to operate, the grafting density of an acquired polymer is high, and the antifouling surface has good marine antifouling effects.

The invention discloses a self-repair powder coating applicable to an aluminum material. The self-repair powder coating is used for electrostatic spraying preparation and application. The powder coating is prepared from, by weight, 450-650 parts of epoxy resin, 300-400 parts of pre-cipitated barium sulfate, 40-50 parts of a curing agent, 5-10 parts of a charge control agent, 20-30 parts of pigment and 40-60 parts of self-repair microcapsules with the catalysis effect. When the coating produces a microcrack, the microcapsules are broken, dicyclopentadiene will rapidly permeate into silver streaks, acts when encountering Grubbs catalyst to produce polymerization and crosslinking, and therefore the repair purpose is achieved. Accordingly, the service life of the powder coating is prolonged, and the self-repair powder coating is applicable to novel industrial production.