659 results about "Phenyl sulfide" patented technology

An optical connector ferrule is a member inside which an optical fiber is secured, and a tip side thereof serves as a connection end surface for an optical fiber. The optical connector ferrule is formed by injection molding, for example, and is formed from polyphenylene sulfide (PPS) resin that contains a filling material (e.g., inorganic fibers or a filler). An internal space is communicated with the tip side of the optical connector ferrule and serves as a hole into which the optical fiber is inserted. Here, the 260° C.×1 minute shrinkage factor of the optical connector ferrule in the present embodiment is 0.13% or less.

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 discloses a stainless steel material for a food-grade straw and a preparation process of the stainless steel material, and relates to the technical field of stainless steel material plating. The silver coating and the antibacterial coating are arranged on the surface of the stainless steel material, and the stainless steel material has good wear resistance and antibacterial performance through the action of the double protective layers. Sulfonated polyphenylene sulfide is added into a silver plating solution, a plating layer is formed after electroplating, the surface of a stainless steel material is not prone to being scratched, the wear resistance of stainless steel is improved, quaternary ammonium salt modified tea polyphenol-nano-silver composite particles are added into the antibacterial coating, and through the synergistic antibacterial effect of quaternary ammonium salt, tea polyphenol and nano-silver, the wear resistance of the stainless steel material is improved. The broad-spectrum antibacterial property is realized, and the efficient antibacterial effect is achieved.

The invention provides an alkali metal group ion selective permeable membrane, a preparation method and a lithium, rubidium and cesium extraction method and system, and the membrane is prepared by taking polyphenylene sulfide, Zr (HPO4) 2 and a high-molecular polymer adhesive as raw materials through mixing, fibration treatment and compression molding processes. Based on the weak dipole adsorption characteristic between the sulfur position of high-crystallization polyphenylene sulfide and alkali metal cations, efficient screening of monovalent alkali metal ions (Li < + >, Rb < + > and Cs < + >) and multivalent impurity ions (Mg < 2 + >, Al < 3 + > and Fe < 2 + >) is achieved, and the method can be used for extracting rubidium and cesium. The ion selective permeable membrane has excellent mechanical properties, high separation efficiency and corrosion resistance, and is low in production cost; and finally, the multiple targets of lepidolite leaching liquid impurity removal and lithium rubidium cesium synergistic extraction are achieved.

The invention relates to high-wear-resistance plastic particles and a preparation method thereof, and belongs to the technical field of high polymer materials. The high-wear-resistance plastic particles comprise the following components in parts by weight: 60-80 parts of polyphenylene sulfide, 1-4 parts of a lubricant, 0.1-0.5 part of an antioxidant, 20-40 parts of glass fibers, 1-4 parts of a modified flame retardant and 5-15 parts of a high-temperature-resistant toughening agent, the high-wear-resistance plastic particle prepared by the invention not only has a good flame-retardant effect, but also has excellent high-temperature-resistant and toughening effects.

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 a PPS high-strength temperature-resistant composite material, preparation thereof and application of the PPS high-strength temperature-resistant composite material in a humanoid robot. The composite material comprises the following raw material components: 35-55 parts by mass of polyphenylene sulfide, 20-40 parts by mass of a composite reinforcing agent, 2-8 parts by mass of a flexibilizer, 3-9 parts by mass of a conductive agent, 3-7 parts by mass of potassium titanate whiskers, 0.2-0.5 part by mass of a coupling agent and 0.1-1 part by mass of an antioxidant, and the composite reinforcing agent comprises more than two reinforcing agents with different forms and / or sizes. The obtained PPS high-strength temperature-resistant composite material is subjected to multi-scale enhancement and multifunctional modification on the basis of a PPS material, the performance limitation of an existing PPS material can be broken through, and powerful material support is provided for high-performance and intelligent development of humanoid robots.

The invention discloses an insulating heat-conducting glass fiber reinforced polyphenylene sulfide composite material and a preparation method thereof. The composite material comprises the following raw material components: 30-50 parts by mass of polyphenylene sulfide, 10-20 parts by mass of glass fiber, 30-50 parts by mass of a heat-conducting filler, 5-10 parts by mass of a compatilizer and 0.3-1 part by mass of a coupling agent, and the heat-conducting filler is selected from one or more of graphite, silicon carbide, aluminum oxide, magnesium oxide, aluminum nitride and hexagonal boron nitride; the compatilizer is selected from a glycidyl methacrylate graft polymer. The polyphenylene sulfide composite material prepared by the preparation method disclosed by the invention has high insulativity, high thermal conductivity and good mechanical properties.

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 discloses a preparation method of a cable with fireproof and flame-retardant functions. A sheath material of the cable is prepared from the following raw materials in parts by weight: 45 to 65 parts of polyphenylene sulfide, 10 to 14 parts of a phosphorus-nitrogen flame retardant, 12 to 18 parts of modified nano magnesium hydroxide, 1.5 to 4 parts of graphene, 3 to 6 parts of carbon nanotubes, 1.5 to 2.5 parts of a silane coupling agent, 0.8 to 1.5 parts of a lubricant, 0.5 to 0.8 part of an antioxidant and 1.2 to 1.8 parts of a cross-linking agent. According to the preparation method of the cable with the fireproof and flame-retardant functions, the flame-retardant efficiency of the cable is remarkably improved by compounding a phosphorus-nitrogen flame retardant, ammonium polyphosphate and melamine cyanurate in a mass ratio of (3.5: 1)-(4.5: 1), modifying with nano magnesium hydroxide and surface stearic acid, and combining with the synergistic effect of graphene oxide and carbon nanotubes, so that the flame-retardant efficiency of the cable is greatly improved, and the flame-retardant performance of the cable is improved. And the phosphorus-nitrogen flame retardant generates an expanded carbon layer during combustion to isolate oxygen and combustible gas, and the nano magnesium hydroxide absorbs heat through decomposition to reduce the combustion temperature and release crystal water to dilute the combustible gas at the same time.

The invention relates to the technical field of high polymer materials, and discloses a synthesis method of low-chlorine polyphenylene sulfide nitrile, which comprises the following steps: carrying out pressurized prepolymerization reaction on a sodium sulfide solution and p-dichlorobenzene to obtain a first prepolymerization reaction product; carrying out copolymerization prepolymerization reaction on the first prepolymerization reaction product and 2, 6-dichlorobenzonitrile to obtain a second prepolymerization reaction product; carrying out heating polymerization reaction on the second prepolymerization reaction product and benzyl chloride to obtain a heating polymerization reaction product; and raising the temperature of the polymerization reaction product, and carrying out phase separation to obtain the low-chlorine polyphenylene sulfide nitrile. Under the condition of no auxiliary agent, the polymerization process of inert gas pressurization and phase separation is adopted, benzyl chloride is applied to adjust the end group, low-chlorine high-molecular-weight polyphenylene sulfide nitrile can be obtained in a short time, the production efficiency of synthesizing polyphenylene sulfide nitrile can be improved, the purification process of byproduct sodium chloride is shortened, auxiliary agent recovery is omitted, and the production cost is reduced. The engineering construction investment is reduced, and the production cost for manufacturing the polyphenylene sulfide nitrile is greatly reduced.

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.

The invention discloses a polyphenylene sulfide oligomer separation method, which comprises: cooling a polyphenylene sulfide product synthesized by a sodium sulfide polymerization reaction, carrying out centrifugation, and carrying out solid-liquid separation to obtain polyphenylene sulfide and a mother solution; the preparation method comprises the following steps: putting polyphenylene sulfide into an aqueous solution of diethanol amine and 1, 3-dimethyl-2-imidazolinone for washing, and collecting a washing solution; mixing the washing solution and the mother solution, carrying out candle type filtration to obtain a filter cake, washing the filter cake with deionized water, and drying to obtain a polyphenylene sulfide oligomer; according to the method, the polyphenylene sulfide is washed in the aqueous solution of the diethanol amine and the 1, 3-dimethyl-2-imidazolinone, oligomer in the polyphenylene sulfide can be better washed out, meanwhile, the polyphenylene sulfide oligomer in the mother solution and the washing solution can be separated from other substances through the addition of the diethanol amine and the 1, 3-dimethyl-2-imidazolinone, and therefore the polyphenylene sulfide can be better washed out. The yield and the purity of the polyphenylene sulfide oligomer are improved.

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 invention discloses a preparation method of a multi-strand stranded cable PPS polymer material, and belongs to the field of cable insulation protection.The method comprises the steps that polyphenylene sulfide and ferrite magnetic powder are weighed and mixed to obtain a first mixed material, and the proportion of the polyphenylene sulfide and the ferrite magnetic powder meets the magnetic powder volume ratio # imgabs0 # = 65%-70%; adding branched polyethylene into the first mixed material, and synchronously adding a polar graft and a composite lubricant to prepare a second mixed material; placing the second mixed material in a high-speed mixer, setting the rotating speed to be 800-1200 rpm, and mixing for 10-15 min to obtain a first mixed material; and putting the first mixture into a double-screw extruder, and finally melting and shearing to obtain the polyphenylene sulfide. The polyphenylene sulfide disclosed by the invention has excellent chemical stability, oxidation resistance and heat resistance.

The invention discloses a high-toughness modified PPS engineering plastic and a preparation method thereof, and relates to the technical field of engineering plastics. The high-toughness modified PPS engineering plastic is prepared from the following raw materials in parts by weight: 40 to 60 parts of polyphenylene sulfide, 10 to 20 parts of maleic anhydride grafted ethylene-octylene copolymer, 5 to 15 parts of nano calcium carbonate, 10 to 20 parts of modified glass fiber, 0.5 to 2 parts of titanate coupling agent, 0.2 to 1 part of antioxidant 1010, 0.2 to 1 part of antioxidant 168, 0.5 to 2 parts of stearic acid, 0.5 to 2 parts of bisoxazoline and 10 to 20 parts of modified polyphenylene sulfide reinforcement. Through a ternary synergistic modification system and a gradient blending process, the bottleneck that toughness and rigidity of traditional PPS are difficult to consider at the same time is broken through, the preparation process is simple and controllable, the raw material cost is reduced compared with similar high-performance engineering plastics, and the high-performance engineering plastic is suitable for industrial large-scale production.

The present invention provides a kind of carbon fiber reinforced acid and alkali resistant PPS material, the carbon fiber reinforced acid and alkali resistant PPS material includes the following components by mass fraction: 40 80 parts of PPS, 5 10 parts of modified carbon fibers, 1 5 parts of modified glass fibers, 1 5 parts of coupling agents, 1 5 parts of antioxidants, 1 10 parts of lubricants. The modified carbon fibers of the present invention have phenylene sulfide structure and star-shaped structure, have good compatibility with other components, can form more regular, tight three-dimensional network structure with other components, strengthen the stability of product, realize the lifting of the multiple performances such as mechanical property, acid and alkali resistance. Meanwhile, the present invention, by introducing phenylene sulfide structure and benzyl alcohol structure in modified glass fibers, effectively improves interfacial compatibility and bonding strength, enhances the compatibility with other components, makes the combination between components tighter, thus further enhancing the dispersibility and stability of system, improves the performance of PPS material.

Embodiments of a co-molded putter-type golf club head comprising a high-density chassis made of a first material and a low-density putter-type body made of a second material. The first material can be a high density metal (i.e., steel or tungsten, but not limited to). The second material can be a low density thermoplastic composite (i.e., polyphenylene sulfide (PPS), polyamide (PA), but not limited to). The chassis comprises a flow aperture, and one or more interlocking features. The putter-type body portion encases the entirety of the at least one interlocking feature. Further, the putter-type body encapsulates the chassis such that the body extends through, and completely fills the flow aperture, to interlock the body and chassis, and thus form the club head. Other embodiments may be described and claimed.

A method for filtering particulate down to 0.5 micron from cooking oil at a filtration temperature of up to 425° Fahrenheit is provided. The method includes providing a filter having at least one non-woven panel of randomly oriented fibers of polyphenylene sulfide (PPS) material and exposing the filter to the oil for a period of time while applying a pressure or vacuum to move the oil through the filter for filtering particulate from the cooking oil.

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 relates to the field of high polymer materials, and particularly provides a polyphenylene sulfide oligomer long-chain branching modification method, two chain extenders, namely a chain extender A and a chain extender B, are added, the chain extender A can increase the molecular chain length of polyphenylene sulfide, and the chain extender B increases the branching degree of the molecular chain while increasing the molecular weight length, so that the polyphenylene sulfide oligomer long-chain branching modification effect is improved. The molar mass of the polyphenylene sulfide oligomer is increased under the combined action of the two, the toughness of the polyphenylene sulfide is improved while the melt viscosity is improved, and in addition, the toughness of the material is further improved while the cost is reduced by adding nano calcium carbonate. Compared with thermal oxidation crosslinking, the preparation method has the advantages of short treatment time and high production efficiency, and compared with other blending modification, the preparation method has the advantages that high-molecular-weight polyphenylene sulfide does not need to be added, and the mixing process is simple.

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 invention relates to the field of high polymer materials, and particularly discloses a polyphenylene sulfide flame-retardant material for a new energy automobile battery pack shell and a preparation method of the polyphenylene sulfide flame-retardant material. The invention discloses a polyphenylene sulfide flame-retardant material for a new energy automobile battery pack shell. The polyphenylene sulfide flame-retardant material comprises the following raw materials in parts by weight: 50-70 parts of polyphenylene sulfide resin, 1-3 parts of a plasticizer, 2-6 parts of a flexibilizer, 2-3 parts of a flame retardant, 0.1-1 part of an antioxidant and 30-50 parts of modified composite fibers, the modified composite fiber comprises polydopamine modified carbon fiber and silicon dioxide modified aramid fiber in a mass ratio of 1: (0.8-1). The polyphenylene sulfide flame-retardant material provided by the invention has the advantages of low brittleness, strong toughness, good tensile and impact-resistant effects and thermal oxidation resistance, and can prevent polyphenylene sulfide from embrittlement and cracking due to thermal oxidation.

The invention relates to the field of composite current collector production, in particular to a high-temperature-resistant flame-retardant composite current collector base film and a preparation method thereof. The composite current collector base film comprises the following components in parts by weight: 100 parts of polyphenylene sulfide resin, 15-25 parts of carbon fibers, 10-30 parts of a flame retardant, 2-4 parts of a plasticizer, 0.6-2 parts of a compatilizer, 0.2-0.8 part of a coupling agent, 1-3 parts of a lubricant, 0.3-1 part of an anti-blocking agent and 0.5-1.5 parts of an antioxidant. The composite current collector base membrane prepared by the method has excellent high temperature resistance and flame retardance, and has excellent performance in the aspects of mechanical strength and dimensional stability, in addition, the binding force with metal is enhanced to a certain degree, and the composite current collector base membrane is more suitable for being used on high-end lithium batteries or electrolytic cell products.

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 provides molding equipment and a molding method for producing a modified polyphenylene sulfide film, and relates to the technical field of lithium battery diaphragms. The forming equipment for producing the modified polyphenylene sulfide film comprises a casting mechanism rack, a mounting rack arranged on the casting mechanism rack and a cleaning roller for removing precipitates and adhered particles on a formed diaphragm. Through linkage cooperation of the first positioning structure and the second positioning structure, rapid and accurate positioning and locking of the cleaning roller are achieved, the problem of jacking failure is solved, meanwhile, a locking mechanism is simplified, the equipment assembling and maintaining difficulty is remarkably reduced, the positioning reliability is improved, and through cooperative control of the double-station rotating base and the magnetic powder clutch, the working efficiency is improved. Rapid switching between the main roller and the standby roller is achieved, the problem that in the prior art, production efficiency is lost due to the fact that the cleaning roller is dismounted after shutdown is solved, and instantaneity of replacement operation of the cleaning roller and operation stability of equipment in the continuous production process are guaranteed.

The invention relates to the field of plastic forming equipment, in particular to a rapid cold cutting device for polyphenylene sulfide granule wire drawing, which is characterized in that a wire drawing strip is extruded and pulled through vertically and symmetrically arranged clamping rings, and the clamped wire drawing strip is cut through a cutting knife which reciprocates in the radial direction, so that in the cutting process, the wire drawing strip can be quickly cut, and the cutting efficiency is improved. The parts, located on the two sides of the cutting knife, of the wiredrawing strips are extruded and fixed by the inner walls of the grooves of the clamping rings, so that the contact parts of the wiredrawing strips and the cutting knife have good stability, the mode that a traditional granulator cuts the wiredrawing strips through cooperation of a hob and a fixed knife is replaced, the situation that notches of the wiredrawing strips deviate due to cutting stress deformation is reduced, and the production efficiency is improved. Meanwhile, the situation that the body is cracked due to cutting deformation of the wiredrawing strip is reduced, the situation that cut particles are splashed, impacted and damaged is reduced, the amount of chippings in the pelletizing process is reduced, the particle forming consistency of polyphenylene sulfide is improved, waste materials are reduced, and the utilization rate of raw materials is increased.