493 results about "Phenyl sulfide" patented technology

The invention relates to the technical field of process control, in particular to a polyphenylene sulfide polymerizer temperature self-adaptive control method, which comprises the following steps: acquiring melt viscosity, heat release power and residence time deviation of a polymerizer in real time, and constructing a normalized multi-dimensional time sequence input vector by using a sliding window technology; and then, through fusing a weight control model of a long short-term memory network and an attention mechanism, combining static working condition characteristics, and analyzing and outputting adaptive weight coefficients for different deviation dimensions in real time. Meanwhile, based on the shear heat effect and the reaction accumulation effect, specific temperature compensation components for the inlet of the heating medium jacket are calculated, and independent amplitude limiting processing is carried out on all the components. And finally, a target set temperature is synthesized through weighting, and an execution mechanism is driven to act accurately by utilizing cascade PID control and a valve flow characteristic inverse mapping model. According to the invention, through deep fusion and mechanism compensation, accurate steady-state control of the polymerization reaction is realized.

The invention relates to an electromagnetic shielding resistant PPS alloy material containing modified carbon nanotubes, and belongs to the technical field of polymer composite materials. The PPS alloy material comprises 70-85 parts of polyphenylene sulfide, 5-15 parts of polyether-ether-ketone or a liquid crystal polymer, 3-8 parts of carbon nanotubes subjected to acyl chloride-amido double-step modification and 5-12 parts of carbon fibers subjected to oxidation treatment, and the carbon fibers subjected to oxidation treatment are covalently connected with the carbon nanotubes subjected to double-step modification. 0.5 to 1.5 parts of a coupling agent, 0.3 to 0.8 part of an antioxidant and 0.2 to 0.6 part of a lubricant. According to the invention, the carbon nanotubes are subjected to surface grafting group modification, and the carbon fibers are subjected to surface oxidation treatment, so that the technical problems that the carbon nanotubes are easy to agglomerate, the interface between the carbon fibers and the matrix is weak, and the shielding efficiency and the mechanical property are difficult to consider are solved, and the carbon nanotubes and the PPS matrix form a composite reinforced structure; the comprehensive improvement of the material in the aspects of electromagnetic shielding, mechanical property, thermal stability and the like is realized.

The invention relates to the technical field of polymer composite materials, in particular to a carbon fiber reinforced nylon 66 / polyphenylene sulfide composite material and a preparation method thereof.The carbon fiber reinforced nylon 66 / polyphenylene sulfide composite material is prepared from, by weight, 40-55 parts of nylon 66, 30-45 parts of polyphenylene sulfide, 15-30 parts of carbon fibers, 5-6 parts of compatilizer, 0.8-1.2 parts of antioxidant and 3-4 parts of flexibilizer, the flexibilizer is ethylene-octylene copolymer grafted maleic anhydride, the grafting rate is 1.2-1.5%, the flexibilizer is ethylene-octylene copolymer grafted maleic anhydride, the grafting rate is 0.8-1.0%, and the antioxidant is a mixture of an antioxidant 1010 and an antioxidant 168 according to a mass ratio of 1: 1. The composite material prepared by the invention is suitable for medium-high temperature scenes, not only solves the problems of insufficient high temperature resistance and poor mechanical properties of traditional materials, but also has good processability and environmental tolerance.

The invention discloses polyphenylene sulfide resin and a preparation method thereof. The weight-average molecular weight of the polyphenylene sulfide resin is 20000-50000, the molar ratio of a sulfydryl terminal group to a chlorine terminal group is 1-9, and the content of the chlorine terminal group is 15-60 [mu] mol / g. In the preparation method of the polyphenylene sulfide resin, a sulfur source, an alkali metal hydroxide and a dihalogen aromatic compound are taken as raw materials and subjected to a polymerization reaction in N-methyl pyrrolidone, and self-blocking is performed by accurately controlling the adding time of the dihalogen aromatic compound, so that controllable adjustment of an active end group is realized. The polyphenylene sulfide resin provided by the invention has excellent processability, and has excellent reactivity with silane coupling agents such as gamma-aminopropyltriethoxysilane and the like.

The invention relates to a flexible PPS film and a preparation method thereof, and belongs to the technical field of film preparation. The film is prepared from the following raw materials in parts by weight: 60 to 80 parts of polyphenylene sulfide, 25 to 40 parts of castor oil-based toughening agent and 5 to 12 parts of organic modified glass fiber. The castor oil-based toughening agent is prepared from a derivative of castor oil and a double-bond end-capping substance; the castor oil derivative is generated by carrying out esterification reaction on castor oil and an isomannitol derivative; the isomannitol derivative is generated by mixing isomannitol and 1, 6-adipic acid according to a molar ratio of 1: (2-3) and carrying out esterification reaction. The castor oil-based toughening agent and the organic modified glass fiber are introduced into the polyphenylene sulfide base material, toughness enhancement of a flexible chain segment of the castor oil and rigidity enhancement of the glass fiber are utilized, and the castor oil-based toughening agent and the glass fiber synergistically enhance and modify the toughness of the polyphenylene sulfide, so that a film formed by stretching is uniform in thickness and good in molding.

This invention discloses a method for preparing a high-temperature resistant ink, belonging to the field of ink technology. The tin-alkyl organosilicon resin prepared by this invention can increase the crosslinking density of the ink, further enhancing its heat resistance. The amino-acrylic acid addition reaction of 3-(methacryloyloxy)propyltrimethoxysilane and 2-aminodiphenyl sulfide forms stable silicon-nitrogen bonds. The formation of these silicon-nitrogen bonds helps to improve the bonding force between the silane and ink molecules, thereby improving the overall thermal stability of the ink. Tin alkylamines can increase the crosslinking density of the ink, further enhancing its heat resistance. The ink of this invention has excellent heat resistance, with an adhesion grade of 1. After firing at 500℃, the ink surface remains good, without cracking, reduced adhesion, peeling, color change, or edge cracking.

The utility model discloses a polyphenylene sulfide plastic particle detection device, which belongs to the technical field of polyphenylene sulfide plastic particle processing, and comprises a bottom plate and a plurality of support components arranged on the bottom plate, one support component is provided with a motor connecting component, the motor connecting component is provided with a rotating motor, and the rotating motor is provided with a rotating shaft. Rotating plates are rotationally mounted at the output end of the rotating motor and on the other supporting assembly, the two rotating plates are connected through a guide column, a screening box is slidably mounted on the guide column, a screening net is mounted on the screening box, and one side of the screening box is connected with one rotating plate through a screening spring. According to the polyphenylene sulfide plastic particle screening device, the rotating motor is arranged, the rotating motor is started to drive the screening box to turn over, unqualified polyphenylene sulfide plastic particles left in the screening box can be conveniently poured into the storage box, the storage box is detached in a sliding mode, and the polyphenylene sulfide plastic particles can be conveniently taken out.

The invention belongs to the field of high polymer material synthesis, and provides a method for preparing polyphenylene sulfide from high-purity p-dichlorobenzene, which adopts the whole process design of pre-construction of a composite sulfur source intermediate, regulation and control of an end group controllable oligomerization polyphenylene sulfide intermediate, segmented polymerization of the high-purity p-dichlorobenzene and precise dehydration-washing-drying. The ultra-low impurity level of 0.05-0.25 wt% of burning residues of the polyphenylene sulfide product, the sodium ion content of 10-200 mg / kg and the chloride ion content of 10-500 mg / kg is achieved, and meanwhile the high-performance stability of the melting point of 270-300 DEG C, the gel fraction of 92-99 wt% and the water content of 0.01-0.20 wt% is kept. The problems of deep removal of inorganic ions and ash content, balance of gel fraction and processability and control of residual solvents in the traditional polyphenylene sulfide preparation process are solved, and the method has wide application value in the fields of high-performance engineering plastics, special fibers, electronic packaging materials and the like.

The invention discloses a composite material for an electrolytic cell frame and accessories, and relates to the field of polymer resin materials. According to the composite material, polycarbonate is added on the basis of polyphenylene sulfide (PPS), the effects of toughening and improving the mechanical strength are achieved, meanwhile, hexagonal boron nitride and glass fibers are added according to the specific amount ratio, polyphenylene sulfide is modified through the synergistic interaction mechanism of the hexagonal boron nitride and the glass fibers, and the heat conduction performance of the composite material is remarkably improved; the composite material has the advantages of high thermal conductivity and good mechanical properties. Meanwhile, the invention further discloses a preparation method of the composite material and application of the composite material in the frame and the accessory of the electrolytic cell, a new material choice is provided for the frame and the accessory of the electrolytic cell, and the prepared frame and the accessory of the electrolytic cell can ensure the temperature uniformity of the material and avoid the influence of thermal stress on the durability of the material in use; and the demand of collaborative optimization of light weight and heat management is met.

The invention discloses a high-rigidity flame-retardant high-CTI polyphenylene sulfide material and a preparation method thereof, and relates to the technical field of polyphenylene sulfide. Comprising the following steps: S1, adding glass fibers and a silane coupling agent into an ethanol water solution, and stirring for reaction to obtain modified glass fibers; s2, uniformly mixing polyphenylene sulfide resin powder, modified glass fibers, modified calcium sulfate whiskers, modified hyperbranched polyphenylene sulfide, a processing aid and an antioxidant, and performing melt extrusion granulation to obtain the high-rigidity flame-retardant high-CTI polyphenylene sulfide material, according to the invention, the polyphenylene sulfide resin powder is used as a matrix, the calcium sulfate whisker modified by in-situ polymerization of glass fiber and nylon is introduced as a filler for synergistic enhancement, and the modified hyperbranched polyphenylene sulfide is added as reinforcing and toughening resin, so that the polyphenylene sulfide material has rigidity and toughness, and meanwhile, the material has excellent stability and flame retardancy, and is suitable for industrial production. The formation of a carbonization passage can be effectively inhibited, and the tracking index of electric leakage is obviously improved.

The present invention provides a polyphenylene sulfide resin having a low chlorine content and a preparation method therefor. The polyphenylene sulfide resin of the present invention has a weight average molecular weight of 55000 or less and a chlorine element content of 900 ppm or less, and the polyphenylene sulfide resin has a rough-surface structure and a specific surface area of 70.00 m2 / g or more obtained according to a BET test method. The polyphenylene sulfide resin provided by the present invention has good fluidity, processability, environmental friendliness, and very good reaction activity during processing and use. In addition, by means of the preparation method of the present invention, a low-chlorine polyphenylene sulfide resin having a proper molecular weight can be obtained by removing chlorine-containing substances from a reaction system during polymerization by providing a reduced pressure condition at the final stage of a polymerization reaction. The method of the present invention can achieve the preparation of the low-chlorine polyphenylene sulfide resin without using additional capping molecules, and the method is relatively simple and further reduces the environmental burden and the production cost.

The invention particularly discloses a preparation method and application of a composite ion exchange membrane. The composite ion exchange membrane is prepared from the following components in parts by weight: 95 to 110 parts of perfluorinated sulfonic acid resin, 5 to 8 parts of functionalized multi-walled carbon nanotubes, 10 to 15 parts of phosphotungstic acid, 1 to 1.8 parts of cerium-tannin complex, 12 to 20 parts of polyphenylene sulfide enhanced net, 30 to 40 parts of sulfonated polyether ether ketone solution, 3 to 5 parts of MXene-silicotungstic acid compound and 1 to 3 parts of polyethyleneimine cross-linking agent. The preparation method comprises the following steps: preparing the functionalized multi-walled carbon nanotube and the cerium-tannin complex; blending the perfluorinated sulfonic acid resin and the functional filler to prepare a membrane casting solution, and coating to form a membrane; a PPS reinforced net and an SPEEK solution are subjected to composite reinforcement, the PPS reinforced net and the SPEEK solution are subjected to PEI crosslinking and then superposed with the membrane, an MXene-silicotungstic acid compound is sprayed on the surface, and the composite ion exchange membrane is obtained through hot pressing and acid activation, has high proton conductivity and excellent mechanical strength and chemical stability and can be applied to a proton exchange membrane electrolytic cell and an all-vanadium redox flow battery.

The invention provides a synthesis method of a thioether ligand and a palladium-catalyzed 2-aryl indole compound, and designs an application of the biphenyl thioether ligand and a palladium catalyst in preparation of the 2-aryl indole compound. Indole and arylboronic acid are subjected to a reaction under the action of a palladium catalyst and a biphenyl sulfide ligand, and the structural formula of the biphenyl sulfide ligand is shown in the specification. Ar is phenyl, furyl, thienyl, naphthyl or phenyl substituted by one or more substituent groups; r1 is methyl, methoxyl, fluorine atom, chlorine atom, bromine atom or methyl ester group; r2 is the same or different and is methyl, ethyl, isopropyl, isobutyl, cyclohexyl, benzyl, n-butyl or n-hexyl; r3 is alkoxy, alkylthio, substituted amino or halogen; the palladium catalyst is a divalent palladium compound.

The application belongs to the technical field of polymer composites, and discloses a low linear expansion coefficient polyphenylene sulfide composite material, a preparation method and application thereof. The composite material comprises 20-60 parts of polyphenylene sulfide resin, 40-80 parts of a low expansion filler system, 0.5-5 parts of a coupling agent, 0.1-1 part of a lubricant and 0.1-1 part of a toning agent. The low expansion filler system is at least two of a lamellar structure filler, a fibrous structure filler and a nano-sized filler. The polyphenylene sulfide composite material obtained has a low linear expansion coefficient while maintaining good mechanical properties through the limiting effect of the lamellar structure filler on the thermal expansion of the resin matrix, the reinforcing effect of the fibrous structure filler on the strength and modulus of the material and the improvement effect of the nano-sized filler on the filling structure and the interface state. The polyphenylene sulfide composite material can be applied to the fields of precision instruments, electronic packaging, electronics and electrical appliances, automobiles and aerospace, etc. which have high requirements for thermal dimensional stability.

The invention relates to the technical field of polyphenylene sulfide, in particular to low-molecular-weight polyphenylene sulfide low in chlorine and easy to purify and a preparation method thereof.The method comprises the steps that 1, sodium hydroxide, sodium acetate and sodium hydrosulfide with the required amount are sequentially put into a reaction kettle, then N-methyl pyrrolidone is added, and heating dehydration is conducted under nitrogen protection to obtain a mixed solution; step 2, adding preheated paradichlorobenzene into the mixed solution, adding a part of phase control agent at the required polymerization temperature and under the protection of nitrogen, and carrying out prepolymerization stage reaction; and step 3, after the prepolymerization stage is completed, carrying out segmented temperature control on the reaction system, adding the residual phase control agent, carrying out polymerization stage reaction, and after the reaction is completed, obtaining the low-molecular-weight polyphenylene sulfide which is low in chlorine and easy to purify. The low molecular weight polyphenylene sulfide with low chlorine radical residue and low ash content is prepared, the phase control agent is easy to prepare and low in price, and the preparation method is easy and convenient to operate and convenient to popularize and apply.

The application relates to the technical field of materials, and discloses a wear-resistant light-soft PVC material and a preparation method thereof. The PVC material is prepared through mixing and foaming forming processes by taking PVC resin as a base material and taking wear-resistant additive modified materials and the like as additives. The wear-resistant additive modified material is prepared by firmly loading nano magnesium oxide on the surface of polyphenylene sulfide fibers. The addition of the wear-resistant additive modified material can reduce the friction coefficient, reduce the direct wear of the matrix, compensate for the problem of strength reduction of the foaming material caused by the cell structure, and endow the material with broad-spectrum antibacterial properties. Therefore, the application can realize low density, soft hand feeling and good resilience of the PVC material, and significantly improve the wear resistance, scratch resistance and antibacterial properties of the material, and overcome the multiple technical problems that the soft foaming PVC material in the prior art is difficult to be light and soft and wear-resistant.

The invention discloses a modification method of end-group-modified polyphenylene sulfide, which comprises the following steps: mixing polyphenylene sulfide prepared by a sodium sulfide method, an organic solvent, a sulfydryl modifier and an organic tin catalyst, and reacting for 1-4 hours at the temperature of 200-300 DEG C to obtain the end-group-modified polyphenylene sulfide, the chemical structural formula of the end group modified polyphenylene sulfide is shown as a formula I, wherein n is greater than 0. According to the invention, isocyanate and a terminal group react under the catalysis of dibutyltin dilaurate to generate thiocarbamate, and the terminal group of polyphenylene sulfide is accurately regulated and modified from the molecular level, so that the solution fluidity of polyphenylene sulfide is improved, and the processability is obviously improved.

The application discloses a preparation method of a key intermediate of dapagliflozin, and belongs to the technical field of preparation of medical intermediates. The preparation method of the key intermediate of dapagliflozin comprises the following steps: 1, 1-ethoxy-4-methylbenzene is prepared by using p-cresol, sodium hydroxide and diethyl sulfate; 2, (4-ethoxybenzyl) phenyl sulfide is prepared by using 1-ethoxy-4-methylbenzene, thiophenol, a palladium catalyst, an alkali and an oxidant; 3, 1-benzyl-4-ethoxybenzene is prepared by using (4-ethoxybenzyl) phenyl sulfide under a hydrogen atmosphere; 4, 4-ethoxy-2'-chlorobenzhydrol is prepared by carrying out chlorination reaction on 1-benzyl-4-ethoxybenzene; and 5, 5-bromo-2-chloro-4'-ethoxybenzhydrol is prepared by carrying out bromination reaction on 4-ethoxy-2'-chlorobenzhydrol. The yield and purity of 5-bromo-2-chloro-4'-ethoxybenzhydrol prepared by the method are higher, the process is safer, and the production cost is reduced.

Use of a composite as a heat and fire shielding material particularly in batteries, wherein the composite comprises at least one layer of a thermoplastic material, wherein said at least one layer is based on an at least partial consolidation of a mixture of: a. one or more thermoplastic fibers selected from the group consisting of polyphenylene sulfide (PPS), polyether ether ketone (PEEK), polyether ketone-ketone (PEKK), polyether imide (PEI), polyether sulfone (PES), polysulfone (PSU), polyphenylene sulfone (PPSU), polyimide (PI), polycarbonate (PC), polyamide (PA), polyaryletherketone (PAEK) or any combination thereof; and b. one or more reinforcement fibers; wherein at least 90 vol % of the one or more reinforcement fibers have an average length according to a gaussian normal distribution of at least 6 mm, preferably of at least 10 mm, more preferably of at least 20 mm.

The invention relates to the technical field of high polymer materials, in particular to modified polyphenylene sulfide and a preparation method thereof, and a modified polyphenylene sulfide membrane and a preparation method thereof. The modified polyphenylene sulfide has a structure as shown in a formula (I), m is any numerical value in a range of 10-300, and n is any numerical value in a range of 3-200; the ratio of m to n is (3-10): (0.1-3). According to the modified polyphenylene sulfide, the polyphenylene sulfide is optimized through a copolymerization structure, so that the toughness of the polyphenylene sulfide is improved, and meanwhile, the relative dielectric constant of the polyphenylene sulfide is further improved. Formula (I).

The invention discloses a method for preparing an alkaline water electrolysis composite diaphragm and the composite diaphragm, and belongs to the technical field of diaphragm preparation, in the method for preparing the alkaline water electrolysis composite diaphragm, the method comprises the steps that 1, a polyphenylene sulfide woven mesh is soaked in a milky white membrane casting solution and taken out after being soaked for a preset first time, and then the polyphenylene sulfide woven mesh is obtained; the impregnated polyphenylene sulfide woven mesh is generated; (2) scraping the impregnated polyphenylene sulfide woven mesh by using a scraper at a preset interval to generate a liquid wet film; (3) putting the liquid wet film into a first coagulating bath, and coagulating under a first coagulating condition to generate a formed white film; and 4) putting the formed white film into a second coagulating bath, and coagulating under a second coagulating condition to generate the alkaline water electrolysis composite diaphragm. The internal microstructure of the diaphragm is regulated and controlled by adjusting the components of the organic coagulating bath, and the prepared composite diaphragm has the characteristics of low surface resistance and excellent mechanical property.

The application relates to a modified polyphenylene sulfide resin and a preparation method thereof, and relates to the field of high polymer materials. The modified polyphenylene sulfide resin comprises the following raw materials in parts by weight: 37.4-67.8 parts of polyphenylene sulfide resin; 30-50 parts of glass fiber; 2-10 parts of a toughening agent; 0.1-0.6 parts of an antioxidant; and 0.1-2 parts of a processing aid. The toughening agent is an ethylene-glycidyl methacrylate copolymer. The impact toughness of the polyphenylene sulfide resin is improved by compounding the glass fiber with the polyphenylene sulfide, the brittleness of the polyphenylene sulfide resin composite material is reduced, the flowability of the polyphenylene sulfide resin in the injection molding process is improved by adding the glass fiber, and the polyphenylene sulfide resin is easy to process and mold; the ethylene-glycidyl methacrylate copolymer is selected as the toughening agent, the compatibility of the glass fiber and the polyphenylene sulfide resin is enhanced, and the rigidity and toughness of the polyphenylene sulfide resin product are enhanced.

This application discloses a harmonica tube and a preparation method thereof, a liquid cooling plate, a battery, and an electric apparatus, where a material of the harmonica tube includes a polyphenylene sulfide composition, and the polyphenylene sulfide composition includes a polyphenylene sulfide resin and a toughening agent; the toughening agent includes a copolymer of an olefin and a glycidyl ester. By providing the polyphenylene sulfide composition as the material for the harmonica tube, this application facilitates reducing issues such as material breakage or poor extrusion flow during extrusion molding, enabling the formed harmonica tube to exhibit excellent mechanical strength, deformation resistance, corrosion resistance, heat resistance, heat dissipation, and creep resistance, lowering the risk of cracking under pressure during use, and enhancing production capacity and product quality.

The invention relates to a high-adhesion modified polyphenylene sulfide powder coating as well as a preparation method and application thereof. The modified polyphenylene sulfide powder is prepared by carrying out modification reaction on a silane coupling agent, polyphenylene sulfide and an optional oxidant in a solvent to obtain polyphenylene sulfide with a silane group at the end group; the polyphenylene sulfide is prepared by hydrolyzing the polyphenylene sulfide with the silane group at the end group; the content of terminal sulfydryl of the polyphenylene sulfide ranges from 3000 mg / Kg to 8000 mg / Kg; the silane coupling agent is selected from one or more of a silane coupling agent with an epoxy group and a silane coupling agent with a sulfydryl group. The powder can be used for a polyphenylene sulfide powder coating, a coating formed by the coating has excellent corrosion resistance and high mechanical performance, and the adhesive force with a metal matrix is remarkably improved.

The application discloses a kind of injection molding magnetic ferrite composite material and preparation method thereof, by following weight percentage component composition: modified ferrite magnetic powder 82%-90%, composite binder 7%-15%, coupling agent 0.3%-0.8%, lubricant 0.5%-1.2%, antioxidant 0.2%-0.5%, reinforcing agent 0.3%-1.0%;The composite binder is mixed by nylon 6, nylon 12 and polyphenylene sulfide according to weight ratio 2:1:0.5-1, the injection molding magnetic ferrite composite material and preparation method thereof, make composite material have good injection molding fluidity, can be prepared shape complex, size tiny magnetic component device, forming precision is high, without subsequent processing, further improve production efficiency, reduce production cost.

The present application relates to a kind of diaphragm and its preparation method and electric device.The diaphragm includes base film, and the base film includes opposite first surface and second surface along the thickness direction;The first surface is provided with first coating, and the first coating includes polycaprolactone, metal oxide catalyst and bismuth-tin eutectic alloy;The second surface is provided with second coating, and the second coating includes core-shell material, and the core-shell material includes inner core and polymer shell, and the inner core includes perfluoropolyether and azobisisobutyronitrile;The base film includes polyether ether ketone and polyphenylene sulfide.The diaphragm provided by the present application uses polyether ether ketone and polyphenylene sulfide as mixed base film, and the first coating and the second coating are differentially set, the diaphragm heat response is sensitive, effectively prevent the occurrence of thermal runaway, the safety performance of lithium ion battery is significantly improved, meanwhile, the energy density of battery has also been greatly improved, and the cycle performance of battery is good.

A polyphenylene sulfide resin composition comprises a polyphenylene sulfide resin, and has tracking resistance of 300 V or more, and thermal shock resistance using a metal inserted molded article of 15 times or more. Provided are a PPS resin composition excellent in tracking resistance and thermal shock resistance, and a molded article thereof.

This invention discloses a polyphenylene sulfide (PPS) microwave absorbing cone, its preparation method, and its application. The method includes processing raw materials, including dehydration, primary reaction (to obtain branched oligomers), chain extension reaction (to obtain PPS polymers), end-capping, slurry filtration, and washing to obtain a PPS powder product. Then, PPS resin raw materials are premixed, melt-granulated, extruded into foamed sheets, and the cone is prepared to obtain the microwave absorbing cone product. After obtaining the PPS material, a co-rotating twin-screw extruder is used to blend and modify the PPS to obtain a functional masterbatch. A supercritical carbon dioxide extrusion method is used to obtain foamed microwave absorbing sheet material, which is then cut, bonded, and assembled into a microwave absorbing cone. This material has an oxygen index of 40%–47%, can withstand a 5kW emission power, and exhibits high oxygen index and high power resistance.

This invention discloses a method for preparing a fiber-reinforced polyphenylene sulfide (PPS) film, belonging to the field of high-performance film preparation. The preparation method includes the following steps: 1) combing PPS fibers into a web, and forming the web using the adhesion of a surface-soluble high-viscosity polymer and hot pressing; 2) preparing an adhesive solution by heating and dissolving PPS powder and a compound solvent; 3) preparing a PPS film through coating and hot pressing processes, and enhancing the thermal stability of the film through oxidation treatment. The fiber-reinforced PPS film prepared by this invention is used as a composite current collector support for lithium batteries.

The invention discloses a damp-heat-resistant flame-retardant polyether-ether-ketone modified material and a preparation method thereof, and relates to the technical field of high polymer material modification. The modified material is prepared from the following raw materials in parts by mass: 70 to 90 parts of polyether-ether-ketone, 5 to 15 parts of polyphenylene sulfide, 10 to 25 parts of self-crosslinking modified phosphorus-nitrogen flame retardant, 0.5 to 2.0 parts of hydrolysis-resistant stabilizer, 0.1 to 0.8 part of antioxidant and 0.2 to 1.0 part of lubricating dispersant, the self-crosslinking modified phosphorus-nitrogen flame retardant is prepared by introducing hydroxyl-containing polyhedral oligomeric silsesquioxane (POSS) and phosphonitrilic chloride trimer into the self-crosslinking modified phosphorus-nitrogen flame retardant and carrying out graft condensation on the hydroxyl-containing POSS and phosphonitrilic chloride trimer. According to the material, through cross-linking hybrid modification and interface synergistic regulation and control, hydrolysis and acid production of the flame retardant are inhibited by utilizing the large steric hindrance hydrophobic effect of POSS, matrix degradation is blocked, the compactness of a flame-retardant layer is enhanced by virtue of the ceramic-carbonization synergistic effect, and the problems that a traditional flame retardant is easy to decompose and is not resistant to damp and heat can be effectively solved; the mechanical strength retention rate and the flame-retardant reliability of the material after high-temperature and high-humidity aging are remarkably improved.