61 results about "Macromolecule synthesis" patented technology

The invention discloses stimuli-responsive cross-linked polyamide and a preparation method and a stimuli-responsive method thereof, and relates to the technical field of polymer synthesis, and the preparation method of the cross-linked polyamide comprises the following steps: heating linear furyl polyamide and a cross-linking agent in a solvent B for reaction to prepare the cross-linked polyamide. The stimuli-responsive crosslinked polyamide is excellent in comprehensive performance, the stimuli-responsive mode is simple, the preparation method is green and convenient, the polyamide is synthesized through a one-pot method, the crosslinked polyamide is synthesized through a DA reaction, and the thermal property and the mechanical property are excellent; in addition, reversible crosslinking occurs under ultrasonic stimulation response, and the thermal performance and the mechanical performance of polyamide can be controllably adjusted. The polyamide performance controllable adjustment method provided by the invention expands the application of polyamide in the fields of biomedical treatment and the like.

The invention relates to the field of organic polymer synthesis and new energy lithium batteries, in particular to a water-based adhesive, a preparation method of the water-based adhesive and application of the water-based adhesive to a lithium ion battery. The invention relates to a water-based adhesive which is obtained by reacting a polycarboxylic acid polymer with a compound containing an epoxy group. Carboxyl groups in polycarboxylic acid react with epoxy groups in epoxy alcohol through carboxylic acid-epoxy addition reaction, and the adhesive has high water solubility due to the fact that the adhesive contains carboxyl groups and hydroxyl groups; and the current trend that the negative electrode water-based adhesive replaces the oily adhesive is met. Through hydroxyl modified polycarboxylic acid, the flexibility of an adhesive film is improved, the electrochemical performance of a battery cell is greatly improved, the hydroxyl modified polycarboxylic acid type water-based adhesive is applied to a silicon negative electrode to assemble a button cell, and it can be found that the long cycle performance, the rate capability and the capacity retention ratio of the cell are greatly improved.

A system and method for automated synthesis of a macromolecule from a nucleic acid template is provided, which includes a flow cell with a sipper, a mount with a thermal block, a pump, a selectable valve, a holder, an XYZ gantry, and a controller. The flow cell can be held in a fixed position while the gantry can move the holder to sippers of the flow cell. In this configuration, the sipper length can be reduced or minimized to reduce loss of precious reagents and the synthesized macromolecule.

The invention belongs to the field of polymer synthesis, chemical engineering and polymer processing, and provides non-alternating polyketone with a quasi-multi-block structure, a preparation method and application, the carbonyl content of the non-alternating polyketone is 0.5-48%, the number-average molecular weight is 1-500 kg / mol, the molecular weight distribution is 1.01-4.00, and the melting point is 80-240 DEG C. The invention further provides a preparation method and application of the non-alternating polyketone with the quasi-multi-block structure. A non-alternating polyketone chain is of a quasi-multi-block structure with a disordered long range and an ordered short range, a polar and non-polar chain structure is shown in a molecular chain, and the carbonyl content is uniformly distributed in the whole macromolecular chain. The non-alternating polyketone is prepared by adopting gas supply operation, and the uniform distribution of carbonyl in a main chain is ensured by maintaining and supplementing the gas with the carbon monoxide content consistent with the carbonyl content of the generated polymer. The non-alternating polyketone prepared by the invention is applied to efficient compatibilization of nylon and polyethylene.

The invention belongs to the technical field of fiber oiling, and particularly relates to a macromolecular synthetic fiber uniform oiling device which comprises an oiling box, two oiling rollers are rotatably connected to the inner wall of the oiling box, and the two oiling rollers are located on the two sides in the oiling box respectively and are different in height; and each thickness adjusting mechanism comprises an L-shaped plate fixedly connected to the outer wall of the oiling box, a servo motor capable of adjusting the rotating speed according to the actual situation is fixedly connected to the L-shaped plate, and a first gear is fixedly connected to the output end of the servo motor. By arranging the drying adjusting mechanism, the drying time of the fiber cloth can be adjusted in real time according to the oil coating thickness, so that the drying time is always in the most appropriate state, and the situation that the drying time is too long or too short, so that excessive curing is caused, and a too hard coating is formed on the surface of the fiber is avoided; and the oiling agent cannot fully permeate and is fixed on the fiber.

The utility model provides a quantitative feeding device for organic polymer synthesis, which comprises a reaction kettle, a blanking hopper and a blanking pipe, and the blanking pipe is fixedly communicated with the bottom of the blanking hopper. The utility model relates to the technical field of organic polymer synthesis. Through the arrangement of the transmission mechanism, after material particles are placed in the discharging hopper, the motor is started to drive the first transmission wheel to rotate, the first transmission wheel drives the second transmission wheel to rotate through the belt, and when the second transmission wheel rotates, the second transmission wheel is driven to rotate through the belt; when the spherical check block rotates to the position where the discharging hole faces upwards, materials in the discharging hopper can pass through the discharging hole and then enter the discharging hopper through the discharging pipe, when the spherical check block rotates to other positions, discharging is not carried out, and intermittent quantitative discharging is achieved through sequential circulation. And material accumulation is avoided, so that the synthesis effect is improved.

The invention provides polyarylether resin as well as a preparation method and application thereof, and relates to the technical field of polymer synthesis. According to the polyarylether resin, starting from the molecular design of a film material, amino groups having acid-base interaction and hydrogen bond interaction with carbon dioxide molecules are introduced into a molecular chain, so that the polyarylether resin with a polar amino structure is obtained, and the polyarylether resin has excellent heat resistance and solubility, and can be used for preparing a membrane material. And good gas separation performance for carbon dioxide and nitrogen. The invention also provides a preparation method of the polyarylether resin and application of the polyarylether resin as a membrane material in gas separation, the polyarylether resin can be used as the membrane material for preparing a gas separation membrane, and the prepared gas separation membrane has high carbon dioxide permeability coefficient and carbon dioxide / nitrogen selectivity.

The invention relates to the technical field of polymer synthesis equipment, in particular to a horizontal prepolymerization reaction kettle which comprises a horizontal kettle body, a mixing area and at least two tackifying areas are sequentially arranged in the horizontal kettle body in the material flowing direction, the adjacent areas are separated through baffles, and the heights of the baffles are decreased progressively in the material flowing direction to form a stepped overflow channel; the double-heating-medium synergistic heating system comprises a gas-phase heating medium loop arranged outside the horizontal kettle body and a liquid-phase heating medium loop arranged inside the horizontal kettle body; and the dynamic heating medium distribution unit is connected with the gas-phase heating medium loop and the liquid-phase heating medium loop, so that the dynamic heating medium distribution unit is used for dynamically adjusting the heat supply proportion of the two loops to the materials at different reaction stages. According to the invention, through collaborative innovation of a temperature control separation system of a double-loop heating medium and a step flow field design of a tackifying area, high-speed heating and high-viscosity fine temperature control of a whole reaction period are synchronously realized in a single set of system in a breakthrough manner.

The invention discloses a production method and application of polyetherketoneketone, and relates to the technical field of polymer synthesis. The production method of the polyetherketoneketone comprises the following steps: a method I: in an inert atmosphere, carrying out polymerization reaction on acyl chloride and diphenyl ether in the presence of Lewis base, Lewis acid and a reaction solvent for a period of time, adding a fluorine-containing end-capping reagent, and continuously reacting for 2-5 hours to obtain end-capped polyetherketoneketone; or the method II comprises the following steps: in an inert atmosphere, carrying out polymerization reaction on acyl chloride, diphenyl ether and a fluorine-containing end-capping reagent in the presence of Lewis base, Lewis acid and a reaction solvent to obtain the end-capped polyether ketone ketone. The fluorine-containing end-capping reagent is adopted for end capping of PEKK, so that the molecular weight and molecular weight distribution of PEKK are effectively controlled, the thermal stability and chemical inertness of the end group of PEKK are remarkably enhanced, and the hydrophobicity of PEKK is improved.

The invention discloses a polyacrylate polymer and a synthesis method thereof, and relates to the technical field of polymer synthesis. According to the invention, specific types of lewis base and lewis acid are adopted, imino indole is used as the lewis base, the lewis base and the imino indole form an adduct or a hindered lewis acid-base pair under the synergy of the lewis acid, the adduct can be dissociated and form an active species under the action of a monomer, or the lewis base and the lewis acid form the hindered lewis acid-base pair. The organic nonmetal N / B Lewis acid-base pair provided by the invention is used for carrying out catalytic reaction, active controllable polymerization is realized in polymerization, the catalytic efficiency is high, and an acrylate copolymer can be efficiently obtained; reaction conditions are easy to meet, and the prepared polymer is high in molecular weight and narrow in molecular weight distribution; the synthesis method provided by the invention does not adopt metal ions, the cost is low, and the catalyst is easy to recover.

The invention discloses small molecular organic acid modified hyaluronic acid as well as a preparation method and application thereof, and belongs to the field of polymer synthesis. The method comprises the following steps: firstly, carrying out modification reaction on hyaluronic acid and an amino-terminated silane coupling agent to generate an amino-terminated hyaluronic acid derivative, and then carrying out grafting reaction on the amino-terminated hyaluronic acid derivative and small-molecular organic acid to prepare the small-molecular organic acid modified hyaluronic acid. The preparation method comprises the following steps: firstly, combining hyaluronic acid with an amino-terminated silane coupling agent to generate an amino-terminated hyaluronic acid derivative; then, the intermediate and small-molecular organic acid are subjected to efficient grafting reaction, and small-molecular organic acid modified hyaluronic acid is successfully prepared. The small molecular organic acid modified hyaluronic acid prepared by the invention has good water solubility and high molecular weight, and has important application value in the fields of skin care products, medical cosmetology and the like.

The invention belongs to the technical field of polymer synthesis and preparation, and discloses a controllable free radical polymerization method of an acrylate monomer based on an organic tellurium compound, which comprises the following steps: by taking azobisisoheptonitrile as an initiator and diphenyl telluride as a chain transfer agent, carrying out a polymerization reaction in an inert gas atmosphere, and carrying out a polymerization reaction to obtain the acrylate monomer based on the organic tellurium compound. And carrying out free radical polymerization reaction on the acrylate monomer under an illumination condition to obtain the polyacrylate compound with controllable molecular weight and dispersity. According to the method, the chain transfer agent is generated in situ by adopting the photo-induced telluride compound, and an ultra-high molecular polymerization product with the molecular weight larger than 40000 can be obtained under the condition that the molecular weight and the dispersity are controlled at the same time.

The utility model relates to the technical field of sealing elements, in particular to a high-sealing-performance pure tetrafluoro modified flooding plug seal sprint gasket, and aims to solve the problems that a traditional gasket is limited in elastic restoring force, insufficient in abrasion resistance, low in tearing strength and ineffective in sealing during long-term use. The gasket comprises a gasket base body wrapped with a supporting piece so as to enhance elasticity and tear resistance. The adjusting layer containing the phase-change material microcapsules is arranged in the base body, the thickness can be automatically adjusted along with temperature changes, and the stable sealing effect is maintained. Expansion rings are arranged close to the edges of the adjusting layers, and the end face adjusting force is further improved. The two end faces are covered with wear-resistant layers compounded with ceramic or polymer synthetic particles, and the surface wear resistance is remarkably improved. The lip groove is formed in the outer side wall, the reinforcing layer is arranged in the lip groove, the edge structural strength is enhanced, and installation adaptability and sealing reliability are improved. The sealing performance and the mechanical strength are improved, the application range is expanded, the maintenance cost is reduced, and the service life is prolonged.

The invention relates to the technical field of polymer synthesis and processing, and provides a preparation method of high molecular weight polyacrylonitrile. By controlling the proportion of the monomer, the initiator and the acidified water, the polymerization reaction is carried out at low monomer concentration, monomer droplet polymerization can be avoided, solid particles are effectively avoided, and the dissolving difficulty of high-molecular-weight polyacrylonitrile in the solution during preparation of the spinning solution is greatly reduced. Meanwhile, acidified water is adopted as a polymerization medium, the viscosity of a polymerization system is reduced, equal consumption of copolymerization components is achieved, the phenomenon of scabbing of a polymerization reactor can be well solved, and finally high-molecular-weight polyacrylonitrile particles which are uniform in particle size distribution and loose in particle surface are obtained.

This invention relates to the field of polymer synthesis and processing technology, and discloses a bio-based copolyester material and its preparation method and application. The bio-based copolyester material is prepared by the following method: (1) Esterification: 2,5-furandicarboxylic acid, polyol and diol are mixed evenly and subjected to esterification reaction at 200-240℃ and 0-5kPa for 4-8 hours; after the reaction, the esterification product is mixed evenly with the catalyst and then put into a polycondensation reactor; (2) Polycondensation: the esterification product is subjected to polycondensation reaction at 250-270℃ and 0.01-10kPa vacuum; after the reaction, the bio-based copolyester material is obtained by filtration, underwater pelletizing and drying. This invention can better solve the delamination problem caused by the phase interface between bio-based copolyester and PETG copolyester and further improve flexibility while satisfying the film shrinkage performance and barrier performance.

The application belongs to the field of polymer synthesis, and discloses a kind of poly delta-thiopentolide and its preparation and depolymerization method.A kind of compound as shown in formula is disclosed.The application also discloses the preparation method of the high molecular compound.The number average molecular weight of poly delta-thiopentolide prepared by the preparation method of the application is significantly improved, and the mechanical property is significantly improved.The application also discloses the degradation method of the high molecular compound.

The invention relates to the technical field of organic-polymer synthesis, in particular to an amino structure silane polymer adhesion promoter and a preparation method and application thereof.The preparation method of the amino structure silane polymer adhesion promoter comprises the following steps that S1, a primary amino compound is added, and stirring is started; s2, at room temperature, dropwise adding an unsaturated double-bond compound and a silane coupling agent into the reaction system separately or in a mixed manner, and starting cooling while dropwise adding until dropwise adding is completed; s3, the reaction system is heated and subjected to a constant-temperature reaction, cooling and discharging are conducted after the reaction is finished, and the amino structure silane polymer adhesion promoter is obtained; the silane polymer adhesion promoter with the amino structure solves the problems that an existing adhesion promoter is poor in compatibility with water-based amino stoving varnish, and a silane coupling agent cannot improve the flexibility of a paint film while improving the adhesion of the paint film.

The present application relates to the technical field of high polymer synthesis and processing, and provides a preparation method of high molecular weight polyacrylonitrile.The present application controls the proportion of monomer, initiator and acidified water, so that the polymerization reaction is carried out at low monomer concentration, monomer droplet polymerization can be avoided, the generation of solid particles is effectively avoided, and the difficulty of dissolving high molecular weight polyacrylonitrile in solution when preparing spinning solution is greatly reduced.At the same time, the present application uses acidified water as the polymerization medium, which is conducive to reducing the viscosity of the polymerization system, realizing equal consumption of copolymerization composition, and also can well solve the phenomenon of scabbing of the polymerization reactor, and finally obtain high molecular weight polyacrylonitrile particles with uniform particle size distribution and loose particle surface.

The invention belongs to the technical field of polymer synthesis. Specifically, the invention relates to a polyarylether polymer and a preparation method thereof, wherein a main chain of the polyarylether polymer comprises a structural part derived from triptycene and / or pentaptycene and a rigid structural part derived from phthalazinone or consists of the structural part and the rigid structural part. The invention also relates to a gas separation membrane comprising said polyarylether polymer and to the use thereof. The polyarylether polymer disclosed by the invention is based on molecular design, molecular chain stacking can be effectively hindered, and the molecular chain stacking density is promoted to be reduced, so that the polyarylether polymer disclosed by the invention has a relatively high free volume. The polyarylether polymer disclosed by the invention has excellent heat resistance and dissolving property and good gas separation performance on helium and methane, and can be used as a gas separation membrane material. The gas separation membrane provided by the invention has relatively high helium permeability coefficient and helium / methane selectivity.

The invention relates to the technical field of polymer synthesis, in particular to a polyaryletherketone copolymer with high Tg and low Tm, a preparation method thereof and a composite material. Comprising the following steps: S1, removing oxygen in a reaction device filled with difluorobenzophenone, dihydroxy diphenyl ether and a reaction solvent under mechanical stirring, then preheating in a protective atmosphere until a homogeneous system is formed, adding a first salt-forming agent, and heating for prepolymerization reaction; s2, adding a diphenol monomer containing a biphenyl structure and a difluoro polyaryl diketone monomer into the reaction system, adding a second salt-forming agent, and heating to carry out a copolymerization reaction; s3, after the reaction is finished, performing post-treatment and precipitation to obtain a polyaryletherketone copolymer with high Tg and low Tm; the material disclosed by the invention has excellent melt flowability and filling capacity, and is suitable for injection molding of complex precise structural parts or thin-wall structural parts.

The application discloses a kind of small molecule organic acid modified hyaluronic acid and its preparation method and application, belong to the field of polymer synthesis.The method first hyaluronic acid is modified with amino-terminated silane coupling agent and is reacted, and the hyaluronic acid derivative with amino-terminated is generated, then grafting reaction is carried out with small molecule organic acid, and small molecule organic acid modified hyaluronic acid is prepared.The application first combines hyaluronic acid with amino-terminated silane coupling agent, and the hyaluronic acid derivative with amino-terminated is generated.Subsequently, using this intermediate, efficient grafting reaction is carried out with small molecule organic acid, and small molecule organic acid modified hyaluronic acid is successfully prepared.Small molecule organic acid modified hyaluronic acid prepared by the application has good water solubility and high molecular weight, and has important application value in the field of skin care, medical cosmetology and the like.

The invention provides a high-temperature-resistant non-sulfonated composite filtrate reducer for drilling fluid and a preparation method of the non-sulfonated composite filtrate reducer, and particularly relates to the field of C08F. The non-sulfonated composite filtrate reducer comprises a modified natural polymer and a synthetic non-sulfonated polymer, the modified natural polymer is etherified-crosslinked double modified konjac glucomannan; the synthetic non-sulfonated polymer is an acrylic acid-itaconic acid-acrylamide terpolymer. A traditional sulfonation treatment agent is abandoned, a full-non-sulfonation system is constructed by adopting environment-friendly components such as a modified natural polymer, a synthetic non-sulfonation polymer and a bio-based modified material, and the biodegradation rate of the system is larger than or equal to 90%, EC50gt; the drilling fluid has no biotoxicity, and completely meets the drilling environmental protection standard. The drilling fluid waste does not need to be treated complexly and can be discharged after reaching the standard only through simple solid-liquid separation, compared with traditional polysulfonate drilling fluid waste treatment, the cost is reduced by 40% or above, and the method is suitable for construction in severe environment-friendly areas.

A flow cell is provided, comprising a molded portion, a cover portion, and at least one sipper, wherein the first end of the sipper is in fluidic communication with the inlet port of a flow channel comprised in the flow cell, and the second end of the sipper is configured to sip a fluid from a fluid container, wherein a first section of the sipper is at least in part located between the molded portion and the cover portion. A method of producing the flow cell is also provided. Furthermore, a system for synthesizing a macromolecule from a sample, wherein the system comprises at least one flow cell of the invention, is also provided.

The invention relates to a synthesis method of terminal group functionalized polyester, and belongs to the technical field of polymer synthesis. The method comprises the following steps: polymerizing a cyclic ester monomer and a monoalcohol initiator containing different functional groups at a low monomer-initiator ratio, firstly, carrying out ring-opening polymerization to generate low-molecular-weight end-group functionalized polyester, carrying out cascade condensation polymerization among the end-group functionalized polyester, and removing the initiator to generate the end-group functionalized polyester with higher molecular weight. Compared with the existing ring-opening polymerization technology, the synthesis method has the characteristics of high polymerization speed, high monomer conversion rate and high end group functionalization degree, and can be used for synthesizing the high-end-group functionalized polyester under the high monomer conversion rate.

The present invention belongs to the field of macromolecular and polymer synthesis. Aiming at the problems that the polymerization reaction of polyphthalaldehyde (POPD) generated by polycondensation of POPD monomer usually needs to be carried out at an ultra-low temperature (≤-40°C), the polymer has poor stability at room temperature and is easy to depolymerize, and the polymer needs to be end-capped after the reaction, the present invention provides a single-component organic Lewis acid-base pair having the structural formula: #imgabs0#n is the carbon chain length, R is any one of hydrogen, methyl, ethyl, butyl, phenyl or substituted phenyl; X is any one of halogen Cl, Br, I, acetate, trifluoroacetate, and succinate; R 1 、R 2 It is one or a combination of hydrogen, alkyl, cycloalkyl, aryl or substituted aryl; Y is a bridged skeleton. The single-component organic Lewis acid-base pair can achieve polymerization of o-phthalaldehyde and epoxy compounds under relatively mild conditions, and the obtained polymer does not need to be end-capped and can be purified for use.

The invention belongs to the technical field of polymer synthesis, and relates to a preparation method of a random cluster peptide, the prepared random cluster peptide and application of the random cluster peptide, and the random cluster peptide is prepared by carrying out random copolymerization on two or more N-phenoxycarbonyl-N-substituted glycine (NNPC) monomers under the action of an initiator, organic acid and organic alkali. The monomer used in the invention has better nucleophilic substance tolerance, storage stability and polymerization operability, the polymerization condition is mild through the use of organic acid and organic alkali, and the preparation of the random clustered peptide with controllable molecular weight and composition and with the reactivity rate of NNPC monomers with different substituent groups close to 1 is realized at the same time. Besides, through optimization of a monomer substituent group, the random cluster peptide is endowed with an LCST property, so that the random cluster peptide has a good application prospect in the field of biomedicine.

The invention relates to the technical field of polymer synthesis, in particular to a polymethyl methacrylate continuous synthesis device and process with an adjustable technical route. A material outlet end of a complete mixing type reactor I of the device is connected with a material inlet end of a complete mixing type reactor II through a pipeline with a valve; the material outlet ends of the complete mixing type reactor I and the complete mixing type reactor II are respectively connected with the system inlet of the piston flow type reactor, the inlet of the devolatilization device and the inlet of the double-screw devolatilization extruder II through pipelines with valves; an outlet of the piston flow type reactor system is connected with an inlet of the double-screw devolatilization extruder I through a pipeline with a valve, and an outlet of the devolatilization device is respectively connected with the inlet of the double-screw devolatilization extruder I and an inlet of the double-screw devolatilization extruder II through pipelines with valves. According to the invention, continuous and stable batch production of PMMA molding compound products is realized, and adaptability and flexibility to a raw material system and a process route are high.

The invention belongs to the technical field of polymer synthesis, and provides a polyurethane fluorescent film derived from 3-(diethylamino)-1, 2-propylene glycol, and the molecular structure of the polyurethane fluorescent film is shown in the specification. The fluorescent film has the light-emitting property and the tensile property, in addition, a complex conjugated structure does not need to be constructed in the synthesis process, the preparation route is simple, and feasibility is provided for large-scale production.

The invention discloses a synthesis method of high-temperature-resistant nylon PA10T, and belongs to the technical field of polymer synthesis. According to the method, a specific chain extender is added in the synthesis process of PA10T, argon inert protection and pressure control are combined, side reactions are effectively inhibited, efficient contact between the chain extender and a terminal group is promoted, and therefore the novel high-temperature-resistant nylon PA10T is obtained. The PA10T polymer obtained by the invention is higher in molecular weight, better in mechanical property and high in synthesis efficiency, can provide an innovative path for clean preparation of high-temperature nylon materials, and has industrial application value and social and economic benefits.