78 results about "Post polymerization" patented technology

The invention discloses intrinsic copolymerized low-temperature toughened polyamide resin which comprises a polyamide component and a flexible chain segment component, and the molar ratio of the polyamide component to the flexible chain segment component is 98.5: 1.5-85: 15; the invention also discloses a preparation method of the intrinsic copolymerized low-temperature toughened polyamide resin, which comprises the following steps: mixing a polyamide component and a flexible chain segment component, and carrying out polymerization reaction in a sectional or continuous manner, and comprises a pre-polymerization process and a post-polymerization process; the intrinsic copolymerized low-temperature toughened polyamide resin obtained by the preparation method disclosed by the invention keeps excellent mechanical strength and modulus while improving low-temperature resistance of the intrinsic copolymerized low-temperature toughened polyamide resin.

The invention discloses a 4, 4 '-bis (omega-alkenyl thioether) diphenyl sulfide monomer and a preparation method, the structural general formula of the 4, 4'-bis (omega-alkenyl thioether) diphenyl sulfide monomer is shown in the specification, n represents the number of methylene and is a positive integer, n = 1-10, the refractive index of a polymer obtained after the monomer and 4 '4-dimercapto diphenyl sulfide are polymerized is larger than 1.65 and smaller than 1.8, diffraction efficiency is remarkably improved, the preparation method is easy to operate, and the preparation method is suitable for industrial production. The invention further provides a photopolymer type holographic recording medium containing the monomer and a preparation method of the photopolymer type holographic recording medium, the sensitivity of the holographic recording medium is larger than 100 cm / mJ, the diffraction efficiency of a recording grating is larger than 95%, the refractive index modulation degree is larger than 0.1, the shrinkage rate is lower than 1%, and the preparation method is simple, controllable and suitable for industrial production. The invention also provides a volume holographic grating containing the holographic recording medium, a holographic optical element and an optical device.

The application discloses a surface treatment process of an antistatic and low-fuzz surgical drape, and relates to the field of layered products.The treatment process comprises the following steps: S1, using a dielectric barrier discharge plasma to treat the surgical drape; S2, using a padding method or a spraying method to apply an antistatic agent solution; S3, uniformly spraying an end-capping agent solution on the surface of the drape treated in the step S2; and S4, steam sterilization, and obtaining the antistatic and low-fuzz surgical drape after cooling.The low-melting-point polymer is compounded with the water-soluble end-capping agent, and combined with high-pressure steam sterilization, so that the polymer can migrate to the end along the capillary effect of the fiber surface after contacting the surface of the drape, and the auxiliary film-forming agent can be instantaneously swelled when meeting water vapor, the polymer can be guided to wrap the fiber end breaking point, and the polymer can be solidified to form a microspherical mechanical lock after cooling.The physical wrapping mechanism of the application can more completely control the falling of the fuzz, so that the risk of foreign body reaction or infection of a surgical incision caused by the falling of the fuzz can be further reduced.

The invention relates to the technical field of polyester material production, and discloses a polymerization method and system for producing chinlon 6 slices, and the provided chinlon 6 slices have the advantages of higher relative viscosity, narrower molecular weight distribution, lower water content, and higher yield. According to the system used by the invention, a ZnO / Al2O3 composite variable active catalyst adding window is directly arranged at the bottom of the melting and mixing unit 1, so that the ZnO / Al2O3 composite variable active catalyst can be ensured to be more uniformly dispersed in the whole reaction system, the reaction conditions are optimized, the variable active catalyst is adopted, the pH is dynamically regulated and controlled, and the reaction efficiency is improved. The exposure degree of active sites of the catalyst can be accurately adjusted according to the requirements of different stages of a polymerization reaction, generation of cyclic dimers in the caprolactam hydrolysis ring-opening process is effectively inhibited in the pre-polymerization stage, the content of cyclic by-products is remarkably reduced to 3.5% or below, the monomer utilization rate is increased, increase of the molecular weight is promoted in the post-polymerization stage, and the yield of the catalyst is increased. And product quality.

The invention discloses an immunomagnetic bead with thermomagnetic dual response, a preparation method of the immunomagnetic bead and application of the immunomagnetic bead in detection of food-borne pathogenic bacteria. The preparation method comprises the following steps: (1) preparation of the magnetic core; (2) construction of the inorganic shell layer; (3) introduction of the temperature-sensitive polymer layer; (4) surface functionalization and streptavidin coupling; organic combination of the thermal response polymer and the magnetic core-shell structure is realized for the first time, so that the immunomagnetic bead has dual response capabilities of temperature control gathering and scattering and magnetic field separation. Under a low-temperature condition, the magnetic beads are kept in a dispersed state, so that target combination is facilitated; after the temperature is raised, the polymer is subjected to hydrophobic collapse, particles are gathered, and rapid capture is realized through a magnetic field, so that the detection efficiency and the binding stability are greatly improved.

The present application relates to nucleic acid molecules for CRISPR cascade nucleic acid detection system and application, and relates to the field of biological detection. The nucleic acid molecules comprise a polymerase binding leading region with a DNA polymerase binding site, a trigger nuclease cleavage region with a trans-cleavage endonuclease binding cleavage site, and an exonuclease polymerization blocking region with a modified 3' end; after the trigger nuclease cleavage region is cleaved, the polymerase binding leading region and the exonuclease polymerization blocking region are connected, the DNA polymerase bound to the polymerase binding leading region can extend the exonuclease polymerization blocking region from the 5' end to the 3' end, and a target sequence that can be recognized by the reporter sgRNA of the CRISPR reporter system is synthesized. The CRISPR cascade nucleic acid detection system constructed by using the nucleic acid molecules can realize two-stage cyclic amplification reaction, and improve the reporting speed, reporting intensity and reporting sensitivity of the CRISPR reporter system.

Provided in the present invention are a degradable ureteral stent and a preparation method therefor, which degradable ureteral stent is of a hollow circular tube structure (1), wherein a fixing structure (2) for preventing sliding is disposed on two ends or one end of the degradable ureteral stent, the tube wall of stent is also provided with a plurality of penetrating drainage side holes (3), and the material used for the stent is a composite material formed by at least a glycolide-ε-caprolactone copolymer, an ethylene oxide polymer and a medical developer. In the glycolide-ε-caprolactone copolymer, the weight percentage content of glycolide is 51-58%, such that the copolymer has appropriate mechanical strength and hardness, and the copolymer gradually becomes soft as the time of degradation increases; moreover, a certain proportion of the ethylene oxide polymer is added, and after the degradation thereof, the polymer has a lower modulus at a definite elongation and is softer and smoother, such that degraded fragments are not prone to becoming stuck and are easier to excrete from the body, and is thus more suitable for preparing a degradable ureter.

This application discloses a separator and a battery cell, relating to the field of secondary battery technology. The separator disclosed in this application includes a base layer and a coating layer located on at least one side of the base layer. The coating layer is made of a polymer, which includes primary particles and secondary particles. Before the separator comes into contact with the electrolyte, the average particle size of the primary polymer particles is A μm, and the average particle size of the secondary polymer particles is B μm. After the separator is wetted with the electrolyte, the average particle size of the primary polymer particles is C μm, and the average particle size of the secondary polymer particles is D μm. Furthermore, A, B, C, and D satisfy the following condition: 5% < (D-B) / B < (C-A) / A < 50%. The separator described in this application exhibits good electrolyte resistance and good adhesion to the electrodes.

This invention discloses a method for preparing a composite solid electrolyte and a method for preparing a battery, belonging to the field of battery technology. The method for preparing the composite solid electrolyte includes: 1. uniformly dispersing a modified oxide electrolyte with a nitride coating in a solvent; 2. dissolving lithium salt and polymer in the solvent of step 1 in a mass ratio of 1:2.5, with lithium salt first and then polymer; 3. coating the mixed solution onto a polytetrafluoroethylene mold using a coating machine and placing it in a vacuum drying oven to obtain a composite solid electrolyte membrane. The battery preparation method includes the above-described method for preparing the composite solid electrolyte. This invention can improve the interface between the battery negative electrode and the electrolyte, improve the dendrite condition of the lithium negative electrode interface, and simultaneously isolate some side reactions between the electrolyte and the negative electrode.

The invention relates to magnetic covalent organic framework (COF) composite nanomaterial immobilized lipase based on amino acid ionic liquid modification as well as a preparation method and application of the magnetic covalent organic framework (COF) composite nanomaterial immobilized lipase. The immobilized enzyme is prepared by taking Fe3O4 as a magnetic core, coating the magnetic core with dopamine, polymerizing to form a COF shell layer, modifying the surface of a carrier with amino acid ionic liquid (HisIL), and covalently immobilizing lipase (such as porcine pancreatic lipase), and the prepared immobilized enzyme is applied to catalytic synthesis of isoamyl acetate through esterification reaction.

In a first aspect, a metal-clad polymer film includes a polymer film adhered to a first metal layer. The root-mean-square roughness (Sq) of the interface between the polymer film and the first metal layer is less than 1 μm. The peel strength between the polymer film and the first metal layer is greater than 5 N / cm after 168 hours of aging at 150° C. when tested for a polymer film having a thickness in the range of from 25 to 75 μm and a first metal layer having a thickness of 18 μm in accordance with IPC-TM-650 test methods. The thickness of the first metal layer is 12 μm or less. The polymer film includes a first thermoplastic polyimide layer. In a second aspect, an electronic device includes the metal-clad polymer film of the first aspect. In a third aspect a process includes for forming a double-sided metal-clad polymer film.

The embodiment of the application provides a sulfur-containing polymer electrolyte and a preparation method thereof, relates to the technical field of supercapacitors, and the preparation method comprises the following steps: mixing double-hydroxyl-terminated polyether sulfone, 4,4'-dimercaptodiphenyl sulfide and an N,N-dimethylformamide solution, the N,N-dimethylformamide solution comprising an electrolyte salt and N,N-dimethylformamide, and stirring at a constant temperature under the protection of an inert atmosphere to generate a monomer mixture; adding terephthaloyl chloride to the monomer mixture to perform a polycondensation reaction, so as to obtain a prepolymer solution; heating the prepolymer solution to perform a post-polymerization reaction, cooling the prepolymer solution to room temperature, adding trimethylolpropane triacrylate and a photoinitiator and uniformly dispersing, so as to obtain a mixed system; performing a cross-linking reaction on the mixed system under ultraviolet light irradiation, so as to form a three-dimensionally cross-linked sulfur-containing polymer electrolyte film; and performing drying treatment on the sulfur-containing polymer electrolyte film, so as to remove residual solvents and obtain a target sulfur-containing polymer electrolyte.

This application discloses a high CTI insulation material and a cable. The high CTI insulation material comprises the following raw materials in parts by weight: 30-40 parts of polyethylene resin; 15-20 parts of polypropylene resin; and 5-7 parts of modifying additives. The modifying additives have a particle size of 4-5 μm and are a mixture of hydrated magnesium aluminate carbonate and the polymer product after hydrolysis of polysiloxane, wherein the polymer product after hydrolysis of polysiloxane coats the hydrated magnesium aluminate carbonate. The cable comprises a conductor and an insulation layer covering the conductor. The insulation layer is made of the high CTI insulation material of this application. The insulation material of this application has good tensile strength and excellent resistance to tracking. The cable of this application has good safety in harsh environments such as humidity and pollution.

The present invention relates to a process for preparing an aqueous polymer dispersion with a specific post-polymerization treatment step. It further relates to an aqueous polymer dispersion and its use as a binder for a coating, a non-woven or woven substrate, an adhesive, a mortar, a putty or a sealant, in particular a waterproofing cementitious coating having low tackiness and high impermeability to water.

The invention discloses a preparation method of modified polyvinyl alcohol and modified polyvinyl alcohol, and belongs to the technical field of chemical synthesis, the preparation method comprises the following steps: adding vinyl acetate, a comonomer and methanol into a reaction kettle, heating to 55-65 DEG C, then adding a methanol solution of an initiator, then dropwise adding the methanol solution of the comonomer, and after dropwise adding is completed, reacting for 1-2 hours; after the reaction is completed, adding a methanol solution of sorbic acid to terminate the reaction, so as to obtain a polymer material; adding the polymer material into a rectification device, rectifying to remove residual monomers, and then adding methanol to obtain a resin solution; adding a sodium hydroxide methanol solution into the resin solution, heating to 40-60 DEG C, stirring and reacting for 20-60 minutes, and then drying to obtain the modified polyvinyl alcohol which is good in water solubility and stable in product quality.

This invention discloses a method for preparing functional carbon materials with atomically dispersed Lewis acid-base sites, comprising: (1) polymer preparation to obtain a polymer sample; (2) polymer modification to obtain a modified polymer sample; (3) polymer carbonization: the modified polymer sample is heat-treated in a non-oxidizing atmosphere to carbonize the modified polymer sample; after carbonization, the system is naturally cooled; then, after washing and drying, the target functional carbon material is obtained. This invention utilizes atomically dispersed Lewis acidic metal sites and basic N sites to modify carbon materials in situ. The prepared functional carbon material has a large specific surface area, well-developed pore structure, abundant acid-base sites, and an atomically distributed structure, which can significantly improve the density of functional sites on the surface of the carbon material and its adsorption efficiency for boron, phosphorus, and metal impurities. Its application in the purification of chlorosilanes can greatly reduce the load of subsequent distillation and impurity removal, and improve the yield and quality of high-purity chlorosilanes.

The invention provides an integrated polymerization production system for flame-retardant nylon slices, which comprises a flame retardant preparation unit, a raw material mixing unit, a pre-polymerization unit, a post-polymerization unit, a grain-sized dicing unit, an extraction unit and a drying unit which are sequentially connected in series, the pre-polymerization unit is connected with the raw material mixing unit, and the post-polymerization unit is connected with the grain-sized dicing unit. The prepolymerization reaction device is used for carrying out prepolymerization reaction with multi-stage pressure-temperature control on the prereactant to generate a prepolymer; wherein the post-polymerization unit is connected with the pre-polymerization unit and is used for carrying out pressure-vacuum pulse controlled post-polymerization reaction on the prepolymer to generate a polymer; and pressure gradient linkage control and temperature curve matching are arranged between the pre-polymerization unit and the post-polymerization unit.

The application discloses a continuous polymerization method of anti-gel copolyamide 56 / 6 and the anti-gel copolyamide 56 / 6, and the continuous polymerization method comprises the following steps: preparing a water solution of polyamide 56 salt by using bio-based pentanediamine and adipic acid, mixing with caprolactam and / or a prepolymer thereof, conveying to a first-stage reactor, pre-polymerizing under normal pressure to form a prepolymer, conveying to a tubular programmed temperature device for programmed temperature and pressure maintaining, then conveying to a second-stage reactor for post-polymerization reaction, obtaining a copolyamide 56 / 6 melt, and finally cooling, granulating and drying to obtain the anti-gel copolyamide 56 / 6. The polymerization process of normal pressure pre-polymerization combined with programmed temperature can reduce the cost of polymerization equipment, effectively inhibit the side reaction of pentanediamine monomer decomposition and volatilization in the preparation process, reduce the melting point through copolymerization, thereby the spinning temperature of the obtained copolymer for spinning can be reduced, the gelation in the spinning process is reduced, the melt stability of the copolymer is enhanced, and the application in the spinning field is met.

The invention provides a water-based Teflon coating and a preparation method thereof, and belongs to the technical field of coatings. The preparation method comprises the following steps: depositing P-doped graphene quantum dots on Teflon particles, embedding the Teflon particles in a SiO2 shell layer, modifying the surfaces of the Teflon particles by using polydopamine, reacting with acrylic acid, polymerizing to prepare a modified polyacrylic resin emulsion, and uniformly stirring and mixing the modified polyacrylic resin emulsion with UiO-66 boron nitride particles, water, a defoaming agent, a dispersing agent, a flatting agent and a cosolvent to prepare the water-based Teflon coating. The prepared water-based Teflon coating overcomes the defects that in a traditional Teflon coating, polytetrafluoroethylene is prone to agglomeration in a water-based system and is poor in adhesive force, insufficient in hardness, poor in abrasion resistance, poor in heat dissipation performance and the like, the prepared water-based Teflon coating is good in mechanical property, abrasion-resistant, appropriate in hardness and good in adhesive force, and meanwhile, the water-based Teflon coating can be used for preparing water-based Teflon coatings. The coating is good in heat dissipation and heat conductivity, good in water dispersibility and convenient to store and transport, has the characteristic of weather resistance of a Teflon coating, and has a wide application prospect.

The application discloses a kettle type series continuous polymerization method and device of FEVE fluorocarbon resin, and the method comprises the following steps: continuously feeding: reaction raw materials are added into a prepolymerization kettle according to a formula proportion, the material in the prepolymerization kettle is monitored and controlled to keep in a set range, a prepolymerization reaction occurs, and a reaction material after the prepolymerization reaction is obtained; continuously polymerizing: the reaction material after the prepolymerization reaction sequentially passes through multiple post-polymerization kettles, a post-polymerization reaction occurs, continuous polymerization is carried out, and a FEVE fluorocarbon resin product is obtained; continuously discharging: the stable FEVE fluorocarbon resin product is collected at the outlet of the final post-polymerization kettle; and the reaction raw materials comprise fluorine-containing gas-phase monomers and hydrocarbon liquid-phase monomers, an initiator, a solvent and the like. Compared with the prior art, the application has the advantages of high automation degree, low energy consumption, good process stability and strong product quality consistency.

A method of making a release coated article is described comprising: providing a release coating comprising at least 50 wt. % of monomer(s) comprising an ethylenically unsaturated group and a terminal alkyl group with at least 18 (e.g. contiguous) carbon atoms based on the total amount of ethylenically unsaturated components; crosslinking components(s) comprising at least two ethylenically unsaturated groups; and at least one polymerization initiator. The release coating is substantially solventless, comprising no greater than 1 wt. % of non-polymerizable organic solvent. The method further comprises applying the release coating to a major surface of a substrate; and polymerizing the monomer(s) and crosslinking component(s) of the release coating after applying the release coating to the substrate. Also described are release coating compositions.

Disclosed in the present invention are a chiral azobenzene polymer crosslinked thin film and preparation method therefor and application thereof. The present invention relates to a novel super-molecular chiral construction and chiral immobilization method based on an achiral side chain type azobenzene polymer thin film. According to the present invention, limonene steam is utilized to perform chiral induction on a polymer thin film at a high temperature, and then formaldehyde steam is utilized to perform acetal reaction with hydroxyl in an acidic environment to achieve crosslinking; and then differences in the stability of the super-molecular chirality of the polymer thin film before and after crosslinking is studied under the conditions of light, heat and good solvent dissolution, and the self-repairing properties of microcosmic helical chirality is researched. The crosslinked thin film prepared by the present invention has good chiral properties, and excellent solvent resistance, heat resistance, and self-repairing properties.

The present invention relates to a process for purifying a plastic feedstock to obtain a stream of purified polyolefins, comprising: a) a dissolution step by contacting the plastic feedstock with a dissolving solvent; then b) a size exclusion extraction step, employing beds of a size exclusion solid in series and fed with the polymer solution from a) at an injection point (F) and with an eluent at an injection point (S) and employing a withdrawal of an extract at a withdrawal point (E) and a withdrawal of a raffinate comprising a purified polymer solution at a withdrawal point (R), the injection and withdrawal points being distinct and offset over time by one bed according to a determined frequency; then c) a polymer-solvent separation step, to obtain a stream of purified polyolefins.The invention also relates to a device for carrying out step b) and a device for carrying out the purification process. Figure 1 to be published.

The invention discloses a preparation method of silicon-containing copolymerized aliphatic long-carbon-chain polyamide resin, which comprises the following steps of: mixing aliphatic long-carbon-chain polyamide salt, long-carbon-chain aliphatic dibasic acid and 1, 3-bis (3-aminopropyl) tetramethyldisiloxane, and performing polycondensation reaction in a sectional or continuous manner, including a pre-polymerization process and a post-polymerization process, thereby obtaining the silicon-containing copolymerized aliphatic long-carbon-chain polyamide resin. The preparation method specifically comprises the following steps: (1) a pre-polymerization process: adding aliphatic long-carbon-chain polyamide salt, long-carbon-chain aliphatic dibasic acid and 1, 3-bis (3-aminopropyl) tetramethyldisiloxane which are mixed according to a molar ratio into a reaction container, adding an amidation catalyst at the same time, replacing with nitrogen, heating to a set temperature under the protection of nitrogen, carrying out a stirring reaction, and cooling to room temperature; continuously reacting at normal pressure for 2-4 hours; and (2) post-polymerization process: in order to further increase the molecular weight, under the nitrogen protection condition, heating the product obtained in the pre-polymerization process in a reaction container to a set temperature, continuously reacting at normal pressure, and cooling to room temperature after the reaction to obtain the polyamide resin. The copolymerized aliphatic long-carbon-chain polyamide resin obtained by the invention has low temperature resistance superior to that of conventional long-carbon-chain polyamide resin; meanwhile, the relatively good mechanical strength and heat resistance of the conventional long-carbon-chain polyamide resin can be retained.

The invention discloses an anti-static and low-flocculus-falling surface treatment process for a surgical drape, and relates to the field of layered products, the treatment process comprises the following steps: S1, treating the surgical drape by adopting dielectric barrier discharge plasma; s2, applying an antistatic agent solution by adopting a padding method or a spraying method; s3, uniformly spraying an end-capping reagent solution on the surface of the sheet treated in the step S2; s4, performing steam sterilization, and cooling to obtain the antistatic low-flocculus-falling surgical drape. A low-melting-point polymer is compounded with a water-soluble end-capping reagent, high-pressure steam sterilization is combined, after the low-melting-point polymer is in contact with the surface of a paving sheet, the low-melting-point polymer can migrate to the tail end under the capillary action of the fiber surface, meanwhile, a film-forming agent is assisted to instantly swell when encountering water vapor, the polymer is guided to wrap a breaking point at the tail end of the fiber, and after cooling, the polymer is solidified to form a microspherical mechanical lock; the physical coating mechanism is more thorough in control of fallen flocculus, so that the risk of foreign body reaction or infection caused by fallen flocculus of an operation wound is further reduced.

The invention discloses a corrosion-resistant aluminum alloy and a preparation method thereof, relates to the technical field of metal surface treatment, and aims to solve the problems of serious pollution, high cost, non-lasting protection and the like of an existing corrosion-resistant means for an aluminum alloy shell of a fuel accessory. The preparation method comprises the following four steps: anodizing an aluminum alloy to lay a substrate for subsequent protection; then soaking in 96-100 DEG C acidic hot water for at least 30 minutes, and soaking in 90-100 DEG C nickel acetate solution for 10-15 minutes for double sealing to strengthen physical barrier; then the aluminum alloy is subjected to hydrophobic treatment, and adhesion of a corrosive medium is reduced; and finally polymerizing and hardening to ensure the stability of the protective layer. According to the corrosion-resistant aluminum alloy prepared through the method, the corrosion resistance is greatly improved, the corrosion-resistant aluminum alloy can be free of corrosion for 1800 h through a neutral salt spray test, the technology is environmentally friendly, the cost is controllable, operation is clear, the service life of a fuel accessory aluminum alloy shell can be prolonged, the safety and reliability of a fuel system can be improved, and the corrosion-resistant aluminum alloy is suitable for large-scale industrial application.

Inventions relate to wearable optical devices. The device comprises optical composite layered polymer material with van der Waals nanoparticles with refractive index higher than 2.8. The difference between the refractive indices of layers comprises not less than 0.3. Method of producing such material comprises: (i) producing the nanoparticles from a high-refractive material, using the method of femtosecond laser fragmentation or ablation in liquid; (ii) distributing the nanoparticles over the polymer by mixing; (iii) forming the layers on substrates using the centrifugation process with subsequent polymerization; (iv) forming the optical composite material from the layers using the liquid transfer method. The technical effect—panoramically expanding the field of view up to the level exceeding physiological capabilities of the human eye.

An electro-optic rearview mirror assembly including a rearview element including a perimeter surface formed from the combination of, moving rearward from the intended viewer, (a) a forward glass portion provided by a forward glass substrate, (b) a forward polymer portion provided by a forward polymer substrate, (c) a forward electrochromic portion provided by a forward electrochromic substrate, (d) a rearward electrochromic portion provided by a rearward electrochromic substrate, (e) a rearward polymer portion provided by a rearward polymer substrate disposed, and (f) a rearward glass portion provided by a rearward glass substrate. The perimeter surface has a contoured portion where moving rearward from the forward polymer portion, each subsequent portion is substantially flush with preceding portion. The contoured portion of the perimeter surface is exposed to an external environment and the electro-optic rearview mirror assembly lacks an element covering the contoured portion.

The invention discloses a leaching-resistant immersed photoresist and a preparation method thereof, and the preparation method comprises the following steps: combining a photoacid agent with calixarene or a derivative thereof to form a functional supramolecule, the calixarene or the derivative thereof at least has a fluorine-containing side chain and a hydroxyl group; performing esterification reaction on the functional supramolecule and methacrylic acid or a derivative thereof to obtain a polymer monomer; and finally, carrying out free radical polymerization reaction on the polymer monomers to obtain macromolecular resin, namely the anti-leaching immersed photoresist. The preparation process provided by the invention is simple, low in synthesis difficulty, low in production cost and easy to industrialize, the obtained anti-leaching immersed photoresist is good in leaching effect, swelling caused by infiltration of component solvents such as moisture in immersion liquid into colloid can be effectively prevented, pattern denaturation is avoided, the anti-leaching immersed photoresist also has very good anti-etching capability, and when the immersed photoresist is used, the anti-leaching effect of the anti-leaching immersed photoresist is greatly improved. A top coating is not needed, and the service life of the lens is prolonged.

This invention belongs to the field of resin preparation technology, specifically relating to a polyphenylene sulfide resin and its preparation method. The preparation method includes the following steps: a composite stabilizer, anhydrous sodium sulfide, and a polar solvent are first mixed; the resulting first mixture undergoes a dehydration reaction to obtain a dehydrated reaction solution; the dehydrated reaction solution is then mixed with p-dichlorobenzene; the resulting second mixture undergoes prepolymerization and postpolymerization sequentially to obtain the polyphenylene sulfide resin; the composite stabilizer includes carbodiimide having the structure of formula I, lithium chloride, and sodium hydroxide; R 1 -(N=C=N) n -R 2 Equation I; n is an integer from 1 to 20; R 1 and R 2 The polymer is independently selected from substituted or unsubstituted alkyl, cycloalkyl, aryl, or aralkyl groups. The composite stabilizer in this invention effectively inhibits excessive hydrolysis by polar solvents, improves reaction efficiency, and controls the polymer molecular structure, thereby obtaining high molecular weight, high yield, and high whiteness PPS resin.