206 results about "Linear polymer" patented technology

The invention discloses an epoxy modified polyurethane self-repairing elastomer as well as a preparation method and application thereof. The preparation method comprises the following steps: carrying out a reaction on polydimethylsiloxane and diisocyanate to prepare a polydimethylsiloxane-polyurethane sol; mixing the polydimethylsiloxane-polyurethane sol with an epoxy end chain extender and a photoinitiator to react, so as to prepare epoxy modified polyurethane sol; and carrying out ultraviolet light curing treatment on the epoxy modified polyurethane sol, so as to prepare the epoxy modified polyurethane self-repairing elastomer. According to the prepared epoxy modified polyurethane self-repairing elastomer, an annular structure and a benzene ring structure are introduced through the chain extender, the mechanical property of the elastomer can be effectively improved, and due to the addition of the epoxy end chain extender, the annular structure and the benzene ring structure can be introduced into a linear polymer chain to improve the mechanical property of the elastomer; and an epoxy group and a photoinitiator are introduced into an original hydrogen bond self-repairing network, so that ultraviolet light driven self-repairing is realized to improve the self-repairing performance.

The invention relates to an amorphous low-temperature-resistant polyester composition and a preparation method thereof. The amorphous low-temperature-resistant composition consists of the following raw materials: a rigid structural unit of copolyester consisting of purified terephthalic acid and phenyl glycol; purified terephthalic acid, isophthalic acid and 1, 4-butanediol form an amorphous flexible structure unit; different linear molecular chains are reasonably connected through a branching agent, the acting force between the molecular chains is increased, the defect that the acting force between linear high molecular molecules is low is overcome, and finally the amorphous low-temperature-resistant polyester composition with soft / hard blocks and a branched structure is formed.

The present invention provides a latent accelerator capable of reducing the curing stress of epoxy resin, and its preparation method and application. The structural formula of the latent accelerator is shown as formula I below. The structure of this accelerator contains both a phosphonium silicate ion structural unit capable of promoting the curing of epoxy resin and a linear polymer structural unit capable of reducing the curing stress of epoxy resin. While acting as an accelerator for epoxy resin, it can endow epoxy resin with advantages such as good fluidity, curability and low curing stress. The present invention also provides an epoxy resin composition containing a linear polymer accelerator capped with phosphonium silicate ions. When encapsulating semiconductor devices using this epoxy resin composition, it has low curing warpage and high encapsulation reliability.

The invention discloses a 4E6 antibody-based oxidized low-density lipoprotein detection method, which comprises: obtaining a model constructed by a target 4E6 monoclonal antibody sequence, carrying out docking analysis on the interaction of antigen binding regions, designing a mutant prediction influence, selecting an optimal combination to construct a new sequence, and carrying out expression purification to obtain the oxidized low-density lipoprotein. The optimization effect is verified by measuring and combining kinetic parameters; a dendritic-linear polymer modified structure on the surface of a latex microsphere is designed and optimized based on a computational material science method, and the modified latex microsphere is synthesized and coupled with an optimized 4E6 monoclonal antibody to form a detection probe; and establishing an oxidized low-density lipoprotein standard curve through a plurality of groups of standard substance solutions, and determining a detection limit and a quantitation limit so as to calculate the sample concentration. According to the scheme, the antibody recognition capability and the signal amplification effect can be improved, and the detection sensitivity and accuracy are improved.

The invention discloses an epoxy resin material for electronic plastic package of a radio frequency chip and a preparation method of the epoxy resin material. The preparation method comprises the following steps: firstly, carrying out alkylation reaction on dicyclopentadiene and phenol in the presence of a catalyst boron trifluoride diethyl etherate to synthesize dicyclopentadiene phenol resin, and epoxidizing the dicyclopentadiene phenol resin through epoxy chloropropane to obtain dicyclopentadiene epoxy resin DCPDDE; then, synthesizing a poly (dicyclopentadiene) linear polymer PDCPD by taking a Pd / Ag ionic compound as a catalyst, and then reacting the PDCPD with cysteamine sulfydryl to obtain dicyclopentadiene cysteamine PDCPDAm; and finally, mixing the DCPDDE, the PDCPDAm, the filler and the coupling agent, stirring, defoaming and curing to form the thermosetting resin with a three-dimensional network structure. The synthetic process is simple, the cost is low, the mobility and polarizability of molecules are limited due to high rigidity and low polarity of the obtained resin, transmission of a radio frequency chip under a high-frequency high-speed signal is ensured, stable operation in a complex working environment is ensured, reliable packaging protection is provided for the radio frequency chip, and the service life of the radio frequency chip is prolonged. And the thermal stability and the low dielectric property of the radio frequency chip are improved to the greatest extent.

Rubber diaphragm, sound device and application thereof are provided; rubber diaphragm includes distortion improving agent with mass percentage of 0.5-50%; distortion improving agent is random linear polymer with more than two monomer components randomly arranged on main chain, and distortion performance is synergistically regulated by monomer components; end group and / or side group and side chain of distortion improving agent includes special chemical reaction crosslinking points with mass percentage of 0.01-20, and number average molecular weight of distortion improving agent is 500-1200000; and distortion improving agent or main chain thereof is prepared by one-step method. Rubber diaphragm includes distortion improving agent, which is random linear polymer that components are randomly arranged on main chain. Sound device of rubber diaphragm is used to reduce distortion of low-frequency band obviously while maintaining good frequency response characteristics; and preparation method of distortion improving agent is simple, low in cost and has wide application.

The invention provides a photovoltaic glass surface self-cleaning coating and a preparation method thereof.The photovoltaic glass surface self-cleaning coating is prepared from a dehydrated organic solvent, 1-7 parts by mass of tetramethyl orthosilicate, 2-15 parts by mass of fluorosilane hydrophobic coupling agent, 10-20 parts by mass of silicon tetrachloride, 1-10 parts by mass of hydrophobic silane coupling agent, 5-15 parts by mass of dichloro (methyl) (3, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5- and 1-10 parts of 2, 3, 3-trifluoropropyl) silane and 1-10 parts of dimethyl dichlorosilane. According to the preparation method, tetramethyl silicate with relatively low reaction activity is used as a raw material to react with silicon tetrachloride to form an intermediate species with moderate activity, and then a linear chain polymer modification layer is pre-formed on the surface by utilizing the difference of reaction rates; a fluorosilane substance added in the coating also can participate in the reaction to form an organic silicon linear polymer with a fluorosilane side chain; in the recombination process of polysiloxane, perfluoro side chains with lower surface energy migrate to the surface of the coating; meanwhile, by adding the dichlorosilane coupling agent and the trichlorosilane coupling agent, the flexibility and hydrophobicity of the coating are improved.

The invention discloses composition and application of an anti-aging organic silicon pressure-sensitive adhesive. The pressure-sensitive adhesive comprises vinyl-terminated raw rubber, methyl MQ resin, an organic solvent, a vinyl functional group-containing organosilicon linear polymer, a vinyl functional group-containing organosilicon branched polymer, a vinyl functional group-containing organosilicon monomer and hydrogen-containing silicone oil. According to the pressure-sensitive adhesive, under the application scene that the adhesive force range is 0-100 g / inch, the adhesive force climbing rate of the organic silicon pressure-sensitive adhesive subjected to high-temperature and high-humidity aging can be smaller than or equal to 50%, the maximum crystal point size of a film surface does not exceed 100 microns, and the crystal point rate of a randomly cut adhesive film of 1 cm * 1 cm is smaller than or equal to 1000 / m < 2 > when a 200-time magnification microscope is used for observing.

Provided is an aqueous based styrene-diene polymer emulsion composition including: i) from 2 to 50 wt. % of one or more polymers including linear polymers characterized by the formula:star polymers characterized by the formula:or combinations thereof; wherein D′, PA, D″, n and X are defined herein; ii) from 0.05 to 5.0 wt. % of one or more surfactants; and iii) the remainder of the composition comprising water. Also provided are an electrode slurry composition for a secondary metal ion battery composition, a secondary metal ion battery anode, a method of improving the life of a secondary metal ion battery, a method of making an aqueous based styrene-diene polymer emulsion composition, and a method of making an electrode slurry composition for a secondary metal ion battery.

The invention discloses hyperbranched polyurethane acrylate UV light-cured resin and a preparation process thereof, and belongs to the technical field of hyperbranched UV light-cured resin. The preparation process disclosed by the invention adopts step-by-step prepolymerization and comprises the following steps: firstly, constructing a linear polymer main chain skeleton by using low-polarity dihydric alcohol, and continuously reacting an obtained primary polyurethane prepolymer with a polyol monomer consisting of trimethylolpropane, trimethylolpropane monoallyl ether, dimethylolpropionic acid and pentaerythritol to obtain a secondary polyurethane prepolymer; and finally, carrying out end capping by adopting pentaerythritol triacrylate. The prepared hyperbranched polyurethane acrylate UV light-cured resin is high in curing speed, low in viscosity, high in hardness and good in flexibility, and can be applied to various fields such as UV plastic coatings, precise ink-jet printing and wood coatings.

The invention belongs to the field of fertilizer production, and particularly relates to a composite suspending agent and an anti-sedimentation layering method for producing a liquid water-soluble fertilizer.The method comprises the steps that modified ammonium nitrate, urea, a nitrogen-potassium fertilizer, monoammonium phosphate and a potassium fertilizer are put into water and stirred to be dissolved at the temperature of 40-50 DEG C, and a mother solution A is obtained; and S2, adding organic matters, medium trace elements selected and added according to a formula and a synergist into the mother liquor A in the step S1, and uniformly stirring and mixing at the temperature of 40-50 DEG C. The xanthan gum and the nano silicon material have the basic effects of preventing sedimentation, resisting layering, dispersing, suspending and stabilizing a system; after the two components are compounded, a remarkable synergistic effect can be generated. Specifically, the three-dimensional physical network structure of the nano silicon material can be intertwined with the linear polymer chain of xanthan gum to form a unique'rigid framework + flexible network 'composite structure, and the structure not only can enhance the suspension capacity of the system, but also can effectively optimize the rheological property.

The invention discloses a formula and a process for filling a pipeline with a polyurethane material, and aims to solve the technical problems that the strength, the thermal stability, the hardness, the elasticity and the compressive strength of the current polyurethane material in the use process are relatively general, the filling and curing speed is low, the polyurethane material can be cured by matching with high temperature, and the service life is relatively short. Comprising the following raw materials in percentage by weight: 40-60% of isocyanate; the mass part of the polyether polyol is 10%-30%; the mass part of the cross-linking agent is 3%-6%; the mass part of the catalyst is 1%-2%; 2%-5% by mass of a foam stabilizer; the mass part of the foaming agent is 5-18%; 3%-4% by mass of a flame retardant; and the mass part of the surfactant is 1%-2%. The chain extender can react with a functional group on a linear polymer chain, so that a molecular chain is prolonged, the mechanical property and the processing property of the polyurethane material are enhanced, the reaction speed is increased, and the strength and the thermal stability of the polyurethane material are improved.

The invention belongs to the technical field of battery negative electrode material porous carbon manufacturing, and particularly relates to a negative electrode porous carbon material with improved mechanical strength and a preparation method thereof. The porous carbon material is prepared by dispersing a first precursor, a second precursor and a curing agent in a solvent, heating and curing to obtain a composite precursor, and performing high-temperature carbonization and activated pore-forming, the first precursor is a cross-linked polymer, and the second precursor is at least one of a linear polymer and a branched polymer; the relative intensity ratio IT / ID of a T peak to a D peak in a Raman spectrum of the porous carbon material is 0.1-0.4; the T peak range of the Raman spectrum is 1050-1200 cm <-1 >, and the D peak range of the Raman spectrum is 1300-1350 cm <-1 >. The porous carbon material prepared by compounding more than two different precursor materials according to a certain proportion has a higher SP3 hybridized carbon atom proportion, and further has excellent mechanical strength.

The invention relates to a composition comprising a) a positive electrode active material based on lithium iron phosphate, and b) a substantially linear polymer or oligomer having at least one acidic phosphate group.

The present invention relates to a positive electrode for a secondary battery and a lithium secondary battery comprising same. The positive electrode comprises: a lithium transition metal oxide containing nickel; a first binder containing a linear polymer; and a second binder containing a branched polymer, wherein the linear polymer contains a functional group capable of forming a hydrogen bond, the branched polymer has 3.0 or less branches per 1,000 carbon atoms, and the weight ratio between the first binder and the second binder is 1:0.26 to 1:0.85.

The present disclosure provides a modified hydrogel adsorbent and a preparation method and application thereof, the preparation method comprising the following steps: (1) mixing a first polymer solution with an acid solution to obtain solution A, mixing a second polymer, a crosslinking agent and a solvent to obtain solution B, mixing solution A and solution B to obtain a mixed solution, adding a lithium ion sieve to obtain a pre-polymer solution, and after reaction, freezing treatment is performed to obtain a hydrogel adsorbent; (2) mixing a linear polymer monomer and an initiator to obtain a modified precursor solution, mixing the hydrogel adsorbent and the modified precursor solution, and performing light irradiation reaction to obtain the modified hydrogel adsorbent. The present disclosure wraps the adsorbent / ion sieve into the hydrogel to prepare a hydrogel adsorbent with good mechanical stability, the impurity ion level in the adsorbent is constant, the method for extracting lithium by concentrating brine through light irradiation can be realized, lithium is extracted while concentrating, a by-product salt is obtained, and no additional concentration step is required.

This invention belongs to the field of functional materials technology, and more specifically, relates to a linear polymer, a photoreactive luminescence-enhanced crosslinked polymer, and their applications. The linear polymer is obtained by homopolymerization or copolymerization with other monomers of an organometallic complex. The linear polymer emits almost no light under ultraviolet or visible light excitation, but undergoes a photochemical reaction under strong ultraviolet irradiation, resulting in polymer crosslinking and enhanced luminescence. The degree of crosslinking, the intensity of luminescence after crosslinking, and the color of the luminescence can be controlled by the ratio of the polymerizable monomer to the comonomer of the organometallic complex. The crosslinked polymer can be used in fields such as information encryption, security anti-counterfeiting, and data storage.

The present invention relates to a positive electrode for a secondary battery which includes a lithium transition metal oxide containing nickel; a first binder including a linear polymer; and a second binder including a branched polymer, wherein the linear polymer includes a hydrogen-bondable functional group, the branched polymer has 3.0 or less branches per 1,000 carbon atoms, and a weight ratio of the first binder to the second binder is in a range of 1:0.26 to 1:0.85, and a positive electrode and a lithium secondary battery which include the same.

The invention discloses a high-selectivity gas separation membrane based on micromolecule in-situ thermal crosslinking and a preparation method of the high-selectivity gas separation membrane, and belongs to the technical field of polymer functional materials and membrane separation. The gas separation membrane is formed by a linear polymer containing a Base structural unit and a micromolecular bifunctional or polyfunctional halogenated cross-linking agent through a thermally induced in-situ cross-linking reaction, and cross-linking agent molecules can be uniformly dispersed in a linear polymer matrix on the molecular scale. Carrying out heat treatment in an inert atmosphere to form a compact covalent network structure and sub-micropore aperture distribution; the free volume and the microporous structure of the gas separation membrane can be precisely regulated and controlled by regulating and controlling the crosslinking temperature, the crosslinking time and the dosage of the crosslinking agent, so that the molecular sieving effect on gas is improved, and the gas separation membrane shows excellent permeability and selectivity in separation systems such as H2 / N2, H2 / CH4, O2 / N2, CO2 / CH2 and the like, and has good plasticizing resistance and aging resistance.

The application belongs to the technical field of polyamide elastomers, and discloses a foaming-grade linear polyamide elastomer, a preparation method and application thereof.The elastomer is formed by copolymerization of specific linear polyamide hard segments, polyether soft segments and small-molecule dihydric alcohol in the presence of a catalyst, an antioxidant and a nucleating agent, and does not strictly contain a multifunctional branching agent or a crosslinking agent.The application mainly eliminates the topological constraint of molecular chain movement by abandoning the chemical crosslinking point, and reduces the internal friction of the material under dynamic cyclic load; meanwhile, the nucleating agent is used to induce the rapid crystallization of the hard segment, and the long forming cycle problem of the linear polymer is solved.The material can also be combined with a specific antioxidant system to realize high melt strength, good resilience and excellent heat aging resistance, which is beneficial to application.

The application discloses a kind of preparation method and system of butadiene-styrene latex using emulsion coagulant modification, belong to high polymer material and synthetic rubber technical field.The application includes: the solution containing lactone compound, linear polymer with upper critical solution temperature is mixed with butadiene-styrene latex, and homogeneous premix system is formed;Under preset temperature condition, the hydrolysis reaction of the lactone compound in the homogeneous premix system is carried out, and the pH value of system drops;When the pH value of the system drops to the isoelectric point of the linear polymer, the dissolution state of the linear polymer under the preset temperature changes from hydrophilic extended conformation to hydrophobic collapse conformation, so as to coalesce latex particles in the butadiene-styrene latex.The application realizes the separation of coagulation reaction and mixing process in time, effectively inhibits the problem of local concentration polarization caused by glue deposition and particle size distribution widening, and the obtained rubber particle is uniform in size and excellent in mechanical property, suitable for industrial production.

The invention relates to a high-solid-content preparation method of a cyclic polymer brush. According to the preparation method disclosed by the invention, electrostatic mediation is utilized to realize intramolecular closed loop of the linear polymer brush, so that the preparation of the annular polymer brush under high solid content is realized; the method can be applied to various monomer systems, is high in universality, simple to operate, high in solid content, high in reaction efficiency and extremely low in by-product content, can realize preparation of the cyclic polymer brush without a complicated separation process, and has extremely high industrial application prospects.

The invention discloses a smell traceability model establishment method, and relates to the technical field of detection, and the method comprises the following steps: collecting to-be-detected volatile gas by using a trapping tube; desorbing the volatile gas to be detected, and then separating to obtain the separated volatile gas; respectively and simultaneously carrying out qualitative and quantitative detection and olfactory identification test on the separated volatile gas; associating a qualitative and quantitative detection result with a smell identification test result, and establishing a smell traceability model; wherein the trapping pipe comprises a first section, a second section and a third section which are arranged in sequence, the material of an adsorbent of the first section comprises quartz wool, the material of an adsorbent of the second section comprises a high-molecular linear polymer, and the material of an adsorbent of the third section comprises graphitized carbon black. The enriched volatile organic compounds are desorbed and then subjected to qualitative and quantitative detection and olfactory identification test, so that the sensory characteristics, properties and contents of the odor substances can be associated, and the establishment of an odor traceability model is realized.

The application discloses a bisphenol A type haloketone monomer, a polyaryletherketone resin and a preparation method and application thereof. The polyaryletherketone resin is a linear polymer composed of structural unit 1 or a polymer linearly and randomly arranged by structural unit 1 and structural unit 2: -R1-A-, structural unit 1; -R2-A-, structural unit 2; wherein A is 1'4-benzenedioxy, 1'3-benzenedioxy or 4'4-biphenyldioxy. The polyaryletherketone resin prepared by using the bisphenol A type haloketone monomer has better mechanical properties, and also has better thermal stability and crystallinity.

The application belongs to the technical field of polymer preparation, and particularly relates to a high-strength self-supporting polypyrrole nano array and a preparation method and application thereof. The preparation method comprises the following steps: (1) first, dispersing a hydroxypropyl-beta-cyclodextrin and polyethylene glycol aqueous solution onto an ice surface, and then adding a pyrrole monomer to form a dispersion liquid; (2) adding an acid solution containing an oxidizing agent to the dispersion liquid, and obtaining the high-strength self-supporting polypyrrole nano array after reaction. The application directly uses a macroscopic ice block as a hard template for polypyrrole preparation, and introduces a cyclic molecule hydroxypropyl-beta-cyclodextrin with hydrophilic and hydrophobic dual functions and polyethylene glycol with a linear polymer chain as an array growth aid, so that a high-strength polypyrrole nano sheet array with a self-supporting structure is prepared through a one-step polymerization method. The high-strength polypyrrole nano sheet array can be used as a conductive filler of polyurethane in the field of 3D printing technology, and greatly improves the mechanical properties and antistatic ability of products.

The invention relates to a flame-retardant and heat-insulating silica gel belt and a preparation method thereof. The flame-retardant and heat-insulating silica gel belt comprises the following raw material components in parts by weight: 150-200 parts of polysiloxane; 2 to 20 parts by weight of a high-temperature-resistant reinforcing agent and 5 to 15 parts by weight of a wear-resistant reinforcing component; 5 to 15 parts by weight of polytetrafluoroethylene resin; 10 to 50 parts by weight of a lubricating rheological agent; the high-temperature-resistant reinforcing agent component comprises heat-resistant particles pretreated by a linear high polymer material, and preferably, the heat-resistant particles are selected from magnesium hydroxide; according to the process and the product provided by the invention, the heat resistance is remarkably improved, and meanwhile, the mechanical properties of the silica gel belt are maintained and even optimized.

The invention discloses a battery fiber of an ultraviolet curing electrolyte as well as a preparation method and application of the battery fiber. The battery fiber comprises an electrode fiber core, a gel electrolyte layer and a polymer encapsulation layer from inside to outside. The electrode fiber core is formed by twisting and compounding a positive electrode fiber and a negative electrode fiber; the gel electrolyte layer is formed by curing a precursor containing a photocuring monomer, a photoinitiator, a linear polymer and a lithium salt through ultraviolet irradiation. According to the preparation method, a stable gel electrolyte layer is rapidly constructed on the surface of the fiber at normal temperature through an ultraviolet curing technology, so that the potential safety hazard that a traditional liquid electrolyte is easy to leak is solved, an electrode-electrolyte interface is also remarkably optimized, and the interface impedance is reduced. The obtained battery fiber has excellent flexibility, high safety and good electrochemical performance, the slender one-dimensional form of the battery fiber can be directly woven into an intelligent fabric through a textile technology, and an ideal flexible embedded power supply solution is provided for wearable electronic equipment.

The present invention provides nanoparticles for targeted elimination of intracellular bacteria and a preparation method thereof. The nanoparticles are composed of a biodegradable nanoparticle matrix, a potassium ion-responsive linear polymer grafted onto the surface of the nanoparticle matrix, and a drug loaded into the pore structure of the nanoparticle matrix. The nanoparticle matrix has a pore structure, the drug is a drug for treating bacterial infection, and the potassium ion-responsive linear polymer can achieve conformational transition and charge reversal after recognizing and responding to potassium ions. The nanoparticles are taken into the cells through the endocytosis of macrophages. In the high potassium ion concentration environment within the cells, the potassium ion-responsive linear polymer on the surface of the nanoparticles complexes with potassium ions, causing the nanoparticles, which are negatively charged in the extracellular fluid, to undergo charge reversal within the cells, thereby inducing the nanoparticles to target and bind to the intracellular bacteria, while simultaneously undergoing conformational transition and releasing the loaded drug.

This invention relates to the field of water-soluble polymer materials technology, and discloses a comb-shaped ternary polymer and its preparation process. The polyacrylamide is polymerized from a backbone monomer, anionic monomer, comb-shaped macromolecular monomer, and optional functional reinforcing monomers under the action of a redox and azo-based composite initiation system. The preparation process includes solution preparation and neutralization, deoxygenation and temperature control, adiabatic polymerization, and post-treatment steps, employing a control strategy combining low-temperature initiation and adiabatic temperature rise polymerization. This invention effectively overcomes the defects of traditional linear polymers—low viscosity retention and poor shear resistance—in high-temperature and high-salt environments by introducing comb-shaped side chains to create a steric hindrance effect. The resulting product possesses ultra-high molecular weight, low water-insoluble content, and excellent solubility, exhibiting excellent salt-resistant thickening advantages and mechanical stability, meeting the oil displacement requirements of harsh reservoir environments.

Disclosed is an electrode composition including an electrode active material, a conductive material, and a binder, in which the binder is composed of a linear polymer and the pH is 5 or more and 7 or less when measured at 25°C, an electrode slurry including the same, an electrode, a lithium secondary battery, and a method for preparing the electrode composition. The electrode composition provides an advantage of simultaneously preventing the generation of hydrogen gas due to surface oxidation reactions during the preparation and storage of the polymer binder-containing electrode composition and / or electrode slurry while providing an advantage of achieving excellent adhesion strength by adjusting the pH of the polymer binder itself.