22 results about "Macromolecule synthesis" patented technology

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 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.

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 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.

The invention belongs to the technical field of material preparation and polymer synthesis, and particularly relates to a preparation method and application of a perfluorosulfonic acid polymer emulsion. The method comprises the following steps: mixing deionized water subjected to nitrogen introduction deoxidation treatment with a fluorine surfactant to form a reaction medium, adding tetrafluoroethylene (TFE) and perfluoroethylene sulfonyl fluoride alkoxy vinyl ether (PFSA-FVE) as monomers, and carrying out thermal polymerization reaction under controlled pressure and temperature conditions to obtain the fluorine-containing polymer. Therefore, the perfluorosulfonic acid polymer emulsion which is uniform in particle size and stable in dispersion is prepared. The emulsion has a high-polarity sulfonic acid group and can be well fused with a polymer material. In the aspect of application, the surface of a commercial polyethylene (PE) diaphragm subjected to cleaning, drying and plasma activating treatment is coated with the emulsion, and the modified diaphragm with the surface rich in sulfonic acid groups is obtained through drying and curing. The modified diaphragm has higher wettability, polarity site density and interface bonding force, and can be used for improving the ionic conduction performance and electrochemical stability of a polymer solid electrolyte or a composite diaphragm. The method disclosed by the invention is controllable in process, good in dispersity and suitable for large-scale preparation of functional diaphragms, macromolecular electrolytes and related energy storage materials.

The application discloses a mineral exploration method based on ancient vortex center identification, and belongs to the technical field of cross of geological mineral exploration, geodynamics and metallogenic prediction. Based on the vortex energy field, vortex contraction potential energy and energy collapse convergence metallogenic theory, the application innovatively proposes a three-layer material differentiation coupling rule of water ancient vortex and mantle magma ancient vortex, takes the ancient vortex center formed in the ancient geological evolution as a core metallogenic target area, accurately identifies and positions the ancient vortex center and vortex ore-controlling structure by means of the technical means combining multi-source data interpretation, field geological verification, geophysical and geochemical detection, divides the vortex core metallogenic belt, the middle life macromolecule synthesis belt and the peripheral hydrocarbon and oil and gas metallogenic belt, and realizes efficient and accurate collaborative exploration of exogenous mineral resources, endogenous metal mineral resources and oil and gas resources by using the core rule that the vortex center contraction potential energy gathers ore-forming materials and energy collapse promotes ore deposition. The application breaks through the limitation of traditional geological exploration, starts from the essence of energy and power of the earth evolution, establishes a new ancient vortex ore-controlling exploration system, is suitable for the general survey, detailed survey and deep concealed ore exploration of various metal deposits and oil and gas energy mineral resources, greatly improves the prospecting accuracy and reduces the exploration cost, and has double major values of mineral exploration and life origin research.

The application provides a B / P organic Lewis acid-base pair for catalyzing active polymerization of renewable vinyl monomers and a catalytic polymerization method thereof, and belongs to the technical field of polymer synthesis.The application realizes the active polymerization of renewable vinyl monomers by the synergistic catalysis of an organic boron Lewis acid and an organic phosphine Lewis base, realizes the active and controllable homopolymerization and copolymerization of different renewable vinyl monomers by adjusting the electronic effect and steric hindrance effect of the organic boron Lewis acid and the organic phosphine Lewis base, the molecular weight of the obtained polymer increases with the increase of the monomer to catalyst ratio, and the monomer conversion rate is 100%.Meanwhile, the B / P organic Lewis acid-base pair catalyst provided by the application is simple to synthesize and easy to commercialize, and the structure is rich in adjustability.The B / P organic Lewis acid-base pair catalyst provided by the application has a small amount in the catalytic reaction and is widely applicable to renewable monomers.

The invention relates to the technical field of polymer synthesis, in particular to polyaspartic acid ester and a synthesis method thereof. The polyaspartic acid ester has a structural formula shown as a formula (I), and the preparation process comprises the following steps: dropwise adding maleate into a mixture of melamine, a catalyst and a solvent, replacing air with inert gas after dropwise adding, heating, reacting, and stopping the reaction after the target conversion rate is reached. The catalyst can obtain a high primary amine conversion rate in a short time, and solves the technical bottlenecks of poor selectivity and low conversion rate in the reaction of organic primary amine with weak activity and maleate. Compared with general polyaspartic acid ester, the obtained polyaspartic acid ester has higher thermal stability and can be applied to the field of flame-retardant materials. (I)

The application discloses the technical field of high polymer synthesis and functional material modification, and relates to a preparation method of low-molecular-weight polyacrylamide. The method comprises the following steps: firstly, preparing a double-metal doped multi-level pore carbon nanotube-covalent organic framework composite modification material, and the preparation process comprises the following steps: surface functionalization of multi-walled carbon nanotubes, growth of a covalent organic framework layer, doping of double-metal ions, and subsequent reduction and calcination treatment; then, adding deionized water, acrylamide and the modification material into a three-necked flask, stirring under nitrogen to dissolve the acrylamide, preparing an oxidation-reduction initiator solution, and dropping the initiator solution into the system under the protection of nitrogen, and polymerization reaction is carried out in a constant-temperature water bath at 19-21 DEG C. After the polymerization is completed, the product system is washed, filtered, and finally, low-molecular-weight polyacrylamide is obtained by using a vacuum freeze-drying method. The polyacrylamide prepared by the method has low and controllable molecular weight, and has good solubility and salt resistance.

The application belongs to the field of polymer synthesis, and particularly relates to a kind of polyarylate based on recycled bisphenol, its high heat resistance and high light transmission film and a preparation method thereof. The application adopts a segmented temperature control interfacial polymerization method, and makes recycled bisphenol monomers containing impurities and aromatic diformyl chloride perform interfacial polymerization reaction in an organic solvent and water system to obtain high-performance polyarylate. The application does not need to refine recycled bisphenol monomers with high energy consumption, and turns disadvantages into advantages, simplifies the process and reduces the cost. The obtained polyarylate and the film prepared therefrom have high heat resistance, excellent mechanical strength and processability, and are suitable for high-end fields such as high-frequency information and light transmission.

The application discloses a low-temperature continuous micro-channel synthesis process of narrow-distribution VP / VI copolymer and belongs to the technical field of polymer synthesis. The process aims at solving the technical problems of composition drift, wide molecular weight distribution and high energy consumption existing in the preparation of VP / VI copolymer by traditional batch method. The application synergizes a micro-channel reactor, a low-temperature oxidation-reduction initiation system and a segmented feeding strategy based on monomer reactivity ratio. Specifically, monomer solution is prepared and segmented; initiator solution is prepared; the first part of monomers and all initiators are reacted in a first micro-channel module at 35-55 DEG C; then the second part of monomers is added at a specific position of a second module, and the reaction is continued; and finally, purification is carried out. The application realizes rapid and uniform polymerization under mild conditions, effectively inhibits composition drift, obtains copolymer with uniform chain segment sequence and narrow molecular weight distribution, and significantly reduces energy consumption, and is suitable for continuous production of high-quality VP / VI copolymer.

The application discloses application of a carboxyl-modified terpyridine ruthenium complex in electrochemiluminescence immunoassay for non-diagnostic or non-therapeutic purposes, and belongs to the field of high polymer synthesis chemistry.The carboxyl-modified terpyridine ruthenium complex is shown as follows: The application further includes a preparation method of the carboxyl-modified terpyridine ruthenium complex, which has low preparation cost, simple purification and high efficiency.The terpyridine ruthenium complex can be used for specific modification of proteins due to the introduction of the carboxyl group, and can also be used as an electrochemiluminescence reagent.The terpyridine ruthenium complex is efficiently labeled with proteins by using DMT-MM as a condensing agent, and has high labeling efficiency, simple operation and low cost, and has a wide application prospect in the field of labeled immunoassay.

The invention relates to the technical field of polymer synthesis, in particular to a preparation method of polyacrylamide for sugar refinement, which comprises the following steps: S1, treating porous polystyrene microspheres; s2, combining the porous polystyrene microspheres with microcrystalline cellulose; s3, dissolving acrylamide, an anionic functional monomer and a temperature-resistant monomer in deionized water, and continuously stirring to obtain a mixed solution; s4, adding the polystyrene microspheres treated in the step S2 into the mixed solution obtained in the step S3, and continuously stirring to obtain a reaction solution; s5, carrying out heating reaction on the reaction liquid; and S6, crushing and drying to obtain polyacrylamide. The molecular weight of the prepared polyacrylamide is controllable, an interpenetrating network is formed, and the flocculation effect is excellent.

The invention relates to the technical field of polymer synthesis, in particular to a medical polymer material efficient synthesis device and a system thereof.The device comprises a reaction tank and a driving part, a reaction cavity is formed in the reaction tank, and a transmission shaft is rotationally connected into the reaction cavity; a plurality of first frames and a plurality of second frames are arranged on the transmission shaft in the circumferential direction, the first frames and the transmission shaft are coaxially and fixedly connected, and a plurality of stirring mechanisms used for stirring materials are arranged on the second frames; driven sleeves are arranged between the second frames and the transmission shafts, the driven sleeves are fixedly connected with the second frames, and the driven sleeves are coaxially and rotationally connected with the transmission shafts; hysteresis assemblies are arranged in the driven sleeves and used for generating included angles between the second frames and the corresponding first frames; the first acquisition module is used for acquiring included angle information; and the control module is used for regulating and controlling the hysteresis component based on the included angle information. According to the invention, high-uniformity mixing of materials in the polymerization reaction process can be realized.

The invention discloses preparation and application of a high-performance copolyester tear-resistant and temperature-resistant composite film sealing material taking methyl m-hydroxybenzoate as a starting material, and belongs to the field of polymer synthesis and composite film materials. High-performance copolyester is obtained through transesterification and catalytic polycondensation reaction, then the high-performance copolyester, a tear-resistant modifier, an antioxidant and the like are subjected to composite processing to obtain the tear-resistant and temperature-resistant composite film sealing material, and the tear-resistant and temperature-resistant composite film sealing material is applied to temperature-resistant and tear-resistant sealing of electrical, mechanical, chemical and other equipment instruments and parts thereof.

The application relates to the technical field of high polymer synthesis, in particular to a double-end hydroxyl low-molecular-weight polyphenyl ether and a synthesis method thereof, the number-average molecular weight of the double-end hydroxyl low-molecular-weight polyphenyl ether is 500-5000; the double-end hydroxyl low-molecular-weight polyphenyl ether is polymerized by a monomer of formula (1) and a monomer of formula (2); wherein B1, B2 and B3 are each independently selected from hydrogen, a halogen atom, substituted or non-substituted C1-C8 alkyl, substituted or non-substituted C6-C 30 aromatic group, and R is any one of a covalent bond, an oxygen atom, a sulfur atom, a carbonyl group, a sulfone group, a sulfoxide group, an amino group and substituted or non-substituted C1-C8 alkylene; the polyphenyl ether prepared by the application has a low number-average molecular weight, and Mw / Mn is less than or equal to 1.10, which indicates that the prepared polyphenyl ether has high purity.

The present application relates to a kind of environment-friendly high toughness high-temperature resistant corrosion-resistant polyamide elastomer and its preparation and application, belong to high polymer synthesis field.The present application provides a kind of polyamide elastomer, the structural formula of the polyamide elastomer is as shown in formula I.The present application has prepared a kind of environment-friendly high toughness high-temperature resistant corrosion-resistant elastomer with new structure, due to the introduction of biphenyl, naphthalene ring structure, it is endowed with excellent heat, corrosion resistance and outstanding rigid-flexible mechanical properties (tensile strength reaches nearly 80MPa, and its elongation at break can reach 900%).