112 results about "Linear polymer" patented technology

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 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 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 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 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.

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.

Provided is a resin composition giving films having excellent dielectric characteristics, the resin composition including a linear polymer which has a repeating unit structure represented by formula (1) and no maleimide group and containing no inorganic particles. In the formula, the X moieties each independently represent an allyl group or a vinyl group and Z represents a divalent group selected from the group consisting of formulae (z1) to (z9) (in the formulae, each black dot "." indicates a bond with the benzene ring).

The present application belongs to the technical field of lithium ion batteries, and particularly relates to a mutual mixing type binder, slurry, and preparation method and application thereof. The mutual mixing type binder comprises a branched polymer A and a linear polymer B, and the combination of the two can fully exert the dispersion and binding effects thereof. The slurry using the mutual mixing type binder, compared with the traditional slurry using a low molecular weight binder or a high molecular weight binder or a modified binder alone, can realize the improvement of electrode sheet peeling force, ensure the dispersibility and stability of the slurry, and thus is more conducive to the production and preparation of lithium battery electrodes.

The invention discloses a negative pole piece and an electrochemical device and an electronic device comprising the same, and belongs to the technical field of electrochemical energy storage. According to the negative electrode plate provided by the invention, the mass percentage of the first negative electrode active material in the negative electrode active material, the specific surface areas of the first negative electrode active material and the second negative electrode active material, and the loss factors of the first binder and the second binder are controlled to meet a specific relational expression, and the first binder is selected to comprise a cross-linked polymer; and when the second binder comprises at least one of a linear polymer and a natural polysaccharide polymer, the secondary battery prepared by the obtained negative pole piece has relatively high energy density, good cycle performance and relatively low charging temperature rise, namely, excellent charging capability.

The invention relates to cationic cyclic oligomeric disulfide as well as a synthesis method and antimicrobial application thereof, and belongs to the technical field of chemical synthesis. The synthesis method provided by the invention comprises the following steps: carrying out primary reaction on a monomer M and an acid solution in a solvent to obtain an intermediate M '; pKa of acid in the acid solution is less than 3, and the monomer M conforms to a specific general formula (I); and S2, adjusting the system to enable the concentration of the acid to be greater than or equal to 0.25 mol / L, carrying out secondary reaction at 25-65 DEG C to obtain a reaction solution, and then carrying out drop precipitation and separation to obtain the cationic cyclic oligomeric disulfide. According to the synthesis method provided by the invention, the cationic cyclic oligomeric disulfide can be selectively obtained, and the product does not contain high-molecular-weight linear high-molecular-weight polydisulfide, so that the yield is high, the oligomer conversion rate is high, and the method is suitable for industrial production. Diversified modification of cation types is beneficial to further research, development and preparation of broad-spectrum antimicrobial agents capable of resisting fungi and mixed bacterial infection.

The present application relates to a preparation process of isotropic pitch and high softening point coating pitch, which uses aromatic oil as raw material oil, and bio-tar or / and bio-pitch as co-carbonization agent. The pre-polymer material is obtained by pre-polymerization reaction of the bottom into the pre-polymerization reactor under the induction of oxygen-containing linear polymer. The photosensitive oxidation crosslinking agent is added to the pre-polymer material, the material distribution tray in the middle of the oxidation crosslinking reaction tower is fed, and the oxidation crosslinking gas enters from the lower part of the crosslinking reaction tower through the gas distributor. The obtained crosslinking pitch product is discharged from the bottom of the reaction tower. The crosslinking pitch then enters the middle of the polymerization reactor, and the polycondensation reaction occurs under the induction of high-energy electron beam irradiation. The polycondensation pitch product is obtained from the lower part of the polymerization reactor. The polycondensation pitch product enters the upper part of the extraction separation tower, and the sub / supercritical solvent enters the lower part of the extraction separation tower. The two-phase countercurrent contact extraction separation is carried out, and the isotropic pitch and high softening point coating pitch are obtained after the extraction solvent is separated.

The invention discloses thermoelectric ionic gel as well as a preparation method and application thereof. The thermoelectric ionic gel comprises the following components: a hydrophilic polymer skeleton, a zwitterion donor, a redox ion pair and water, wherein the hydrophilic polymer skeleton is prepared by reacting a hydrophilic straight-chain polymer and a hydrophilic monomer containing carbon-carbon double bonds. The preparation method of the thermoelectric ionic gel comprises the following steps: 1) dispersing a hydrophilic straight-chain polymer, a hydrophilic monomer containing a carbon-carbon double bond, a zwitterion donor, an initiator and a cross-linking agent in water for polymerization reaction to obtain ionic gel; and 2) immersing the ionized water gel into a redox ion pair aqueous solution for ion exchange, and then aging. The thermoelectric ionic gel disclosed by the invention has excellent ionic thermoelectric performance and excellent flame retardance, can realize efficient energy storage under temperature difference, and is suitable for preparing thermoelectric supercapacitors, fire early warning devices, flame-retardant materials or thermoelectric conversion materials.

The present disclosure provides water-based binders that address the challenges associated with simple linear polymer binders. In some embodiments, the binders contain Lewis acid and Lewis base moieties that chemically interact. Different species, such as two different types of polymers, or a linear polymer and particles (e.g., made of different polymers), can be used. The first species may have only Lewis acid moieties therein (e.g., on it), and the second species may have only Lewis base moieties therein (e.g., on it). In some embodiments, a linear polymer containing Lewis base moieties (e.g., in its backbone) and polymer particles containing Lewis acid moieties are used to form a supramolecular binder in which the Lewis acid and Lewis base moieties chemically interact.

The invention discloses an injectable self-healing hydrogel based on thiohemiketal as well as a preparation method and application thereof, and the injectable self-healing hydrogel is prepared according to the following steps: (1) preparation of a water-soluble trifluoroacetophenone monomer: adding 1-(4-(bromomethyl) phenyl)-2, 2, 4-triazole-1-yl)-1, 2, 4-triazole-1-yl)-2, 2, 4-triazole-1-yl)-2, 2, 4- The preparation method comprises the following steps: carrying out quaternization reaction on 2, 2-trifluoroethyl-1-ketone and a quaternization reagent containing double bonds to obtain a water-soluble trifluoroacetophenone monomer; (2) carrying out free radical copolymerization on a water-soluble trifluoroacetophenone monomer and a hydrophilic monomer to obtain a trifluoroacetophenone functionalized linear polymer; and (3) mixing the trifluoroacetophenone functionalized linear polymer with the aqueous solution of the multi-sulfhydryl compound to obtain the injectable self-healing hydrogel based on the thiohemiketal. According to the method, a linear polymer functionalized by trifluoroacetophenone reacts with a multi-sulfhydryl compound to form the thiohemiketal dynamic cross-linked injectable self-healing hydrogel, so that the problems that part of dynamic covalent hydrogel is insufficient in self-healing performance and limited in pH use range are solved.

This invention relates to the field of compound synthesis, and particularly to monosilane methacrylate and its preparation method, as well as compound water-reducing agents and their preparation methods. This invention prepares monosilane methacrylate by esterification of (meth)acrylic acid and hydroxyl-modified silicone oil under the action of a catalyst and a polymerization inhibitor. This method utilizes the hydrophobic properties of small-molecule silicone oil as a linear polymer, selecting small-molecule hydroxyl-terminated silicone oil and (meth)acrylic acid from unsaturated carboxylic acids as raw materials, and esterifying them to generate monosilane methacrylate, thus improving its hydrophilicity. The generated monosilane methacrylate is then copolymerized with unsaturated carboxylic acids to synthesize a water-reducing agent with Si-O bonds as the core, retaining the easy film-forming and high rigidity properties of long-chain siloxanes. This monosilane methacrylate is suitable for gypsum-based self-leveling mortars, exhibiting excellent water absorption, impermeability, and compressive strength, thus providing waterproofing and reinforcing effects in gypsum-based mortars.

The disclosure provides a composite polymer electrolyte for energy storage frequency modulation lithium-sulfur batteries and a preparation method and application thereof. The preparation method comprises the following steps: stirring and treating mercapto-terminated polyoxypropylene ether, 3,4-epoxy tetrahydrothiophene and a mixed solvent, adding electrolyte salt and stirring and treating, carrying out ring-opening reaction of mercapto and epoxy to form a first prepolymer liquid; stirring and treating the first prepolymer liquid with dithiodipropionamide and azobisisobutyronitrile, carrying out addition reaction of dithiodipropionamide and linear polymer terminal mercapto after temperature rising, simultaneously carrying out coordination of electrolyte salt and residual sulfur heterocycle of 3,4-epoxy tetrahydrothiophene, forming a preliminary crosslinking system containing a dynamic disulfide bond, cooling to room temperature after reaction to obtain a second prepolymer liquid; adding a photoinitiator and a thermal initiator into the second prepolymer liquid, forming a three-dimensional crosslinking structure with dynamic and rigid properties, cooling to room temperature to obtain a gel-like membrane body; and drying the gel-like membrane body to obtain a sulfur-containing composite polymer electrolyte membrane.

Concentrated aqueous suspension of microfibrillated cellulose (MFC) comprising salts for plant nutrition, the concentrated aqueous suspension comprises microfibrillated linear polymers of D-glucose molecules (cellulose microfibers), calcium ions, sulfate ions and other elements for plant nutrition, being the concentration of calcium ions and sulfate ions in excess of the concentration corresponding to the solubility of calcium sulfate in water and being the proportion of microfibrillated cellulose (MFC) within a range of 1% and 99% w / w of the suspension.

The invention discloses a preparation method of a vinylidene fluoride polymer with good processability, the vinylidene fluoride polymer with good processability is prepared by introducing a modified monomer and carrying out three stages of thermostatic reaction, heating reaction and depressurization reaction, the thermostatic reaction at a lower temperature provides conditions for chain growth, and the vinylidene fluoride polymer with good processability is prepared. The temperature rise reaction is beneficial to chain transfer of the polymer, depending on a chain transfer mechanism under high-temperature and low-pressure conditions in the free radical polymerization process, high temperature and low pressure are both beneficial to chain transfer to the polymer, the vinylidene fluoride polymer with a branched structure is effectively formed, and the pressure reduction reaction is mainly used for widening the molecular weight distribution width of vinylidene fluoride. The vinylidene fluoride polymer prepared by the invention has a branched structure, and compared with a conventional linear polymer, the vinylidene fluoride polymer has lower melt viscosity, higher melt strength and wider molecular weight distribution, and shows good shear thinning and strain hardening behaviors in a shear or tensile state.

A fluid composition capable of exhibiting elastic turbulence when pumped through a flow path that forces a change of direction of a flow line, and comprising a solution of two or more two classes of flexible linear polymers. The first class has an average molecular weight of at least 10 mega Daltons and the second class has an average molecular weight in the range of 0.25 to 5 mega Daltons. The concentration of the first polymer is sufficient to achieve elastic turbulence regardless of the presence of the second class. The concentration of the second class is greater than the concentration of the first class. When flowing to or out of the chamber at low shear, the flow path will cause elastic turbulence, and the second polymer will reduce elastic instability and pressure drop resulting therefrom, thereby reducing pumping energy requirements.

The application discloses a kind of composition and application of ageing-resistant organic silicon pressure sensitive adhesive.The pressure sensitive adhesive includes: end vinyl raw rubber, methyl MQ resin, organic solvent, organic silicon linear polymer with vinyl functional group, organic silicon branched polymer with vinyl functional group, organic silicon monomer with vinyl functional group, hydrogen-containing silicone oil.The pressure sensitive adhesive can be applied in the application scene with the range of bonding force 0-100g / inch, the bonding force climbing rate of organic silicon pressure sensitive adhesive high temperature and high humidity ageing can reach ≤50%, the maximum crystal point size of film surface is not more than 100 μm, and 200 times magnification microscope observation 1cm×1cm adhesive film cut randomly, crystal point rate ≤1000 / m 2 .

The application discloses a kind of high air-tightness supercritical foaming shoe sole material and preparation method, application, belong to footwear parts field.The preparation method includes: the mixing material is sequentially carried out injection molding, irradiation crosslinking, supercritical foaming and mould pressing, and high air-tightness supercritical foaming shoe sole material is obtained;The mixing material includes: ethylene-vinyl acetate 40-55 parts, polyolefin POE elastomer 10-20 parts, styrene elastomer 10-20 parts, linear polymer elastomer 10-25 parts, ethylene-vinyl alcohol copolymer 5-10 parts, acrylate rubber 5-10 parts, copolymer tackifying resin 2-4 parts, carboxymethyl cellulose 3-5 parts, crosslinking agent 0.4-0.6 parts, irradiation sensitizer 0.3-1 part, lubricant 0.8-1.1 part.The supercritical foaming shoe sole material provided has high air-tightness, still has good performance stability under satisfying density, elasticity and other physical properties.

The disclosed technology includes a bioabsorbable material configured to be delivered to tissue. The material includes a shape memory polymer that is compressible in a delivery configuration and is configured to expand over a predetermined period of time. The shape memory polymer includes one or more functional groups reversibly bondable between adjacent functional groups to transition between an approximately linear polymer and an approximately non-linear polymer upon exposure to a stimulus.