33results about How to "Improve plasticizing effect" patented technology

The invention belongs to the field of polymeric membranes. The invention relates to a BOPLA (biaxially-oriented polylactic acid) film with high stretching ratio and a preparation method thereof. The packaging film comprises the following raw materials in parts by weight: 80-90 parts of PLA; 10 to 20 parts of PPC-P (Polypropylene Chloride-P); 10-15 parts of a plasticizer; 3.0 to 5.0 parts of a chain extender; 0.3 to 0.5 part of an antioxidant; 0.5 to 1.0 part of a lubricant; 0.1 to 0.3 part of an anti-hydrolysis agent; wherein the total mass of the PLA and the PPC-P is 100 parts; the preparation method comprises the following steps: mixing, extruding and plasticizing the raw materials according to the formula, and carrying out an asynchronous two-way stretching process, heat setting, traction, slitting and rolling. According to the present invention, the defects of mechanical property degradation and poor optical property of the PLA under the high stretching rate in the prior art can be effectively solved, and the great application potential is provided.

The invention discloses an environment-friendly macromolecular modifier PVC (polyvinyl chloride) composition, and belongs to the technical field of polyvinyl chloride materials. The composition comprises the following components in parts by weight: 100 parts of PVC, 1-50 parts of a polycarbonate toughening modifier and 0-30 parts of an auxiliary agent. The polycarbonate toughening modifier with a certain polymerization degree is used as the modifier of the PVC material, the plasticity, toughness, impact resistance and other properties of PVC can be obviously improved, the polycarbonate toughening modifier is a macromolecular polymer and cannot be separated out in the use process, the safety of the PVC material is improved, and the service life of the PVC material is prolonged.

The invention discloses a preparation method of polylactic acid fibers for medical and sanitary materials, and relates to the technical field of polylactic acid fibers. Nano-crystalline cellulose, nano-graphite particles and polylactic acid are blended and crosslinked, the mechanical property of a matrix is enhanced, the antibacterial property is achieved, fibers are prepared through spinning, supercritical carbon dioxide treatment is conducted for the first time, the nano-graphite particles can play a role of a nucleating agent, polylactic acid is promoted to form fine and uniform crystals, and the mechanical property of the matrix is improved. Carbon dioxide is effectively wrapped in the foaming process, a micropore structure is formed in the fiber, the mechanical property of a matrix is enhanced, then secondary supercritical carbon dioxide treatment is conducted, the nano-silver is loaded into the matrix through supercritical fluid, the antibacterial property and the mechanical property are further improved, then the nano-silver is soaked in a silicate solution, dehydration is conducted, and the nano-silver fiber is obtained. A silica gel layer is formed on the surface of the fiber, so that the mechanical property and the antibacterial property of a matrix are enhanced.

The invention relates to the technical field of lithium ion batteries, and provides a pole piece plasticizer for a lithium battery. The plasticizer provided by the invention has the advantages of good plasticizing effect, good flexibility improvement, simple preparation process and controllable structure, is a water-oil universal plasticizer, and can be applied to the plasticizing of positive pole pieces such as lithium nickel cobalt manganate, lithium iron manganese phosphate, lithium iron phosphate, lithium cobalt oxide and lithium manganate of a lithium battery; the plasticizer can be used for plasticizing negative pole pieces such as graphite, hard carbon, silicon monoxide / graphite mixture and the like, is a universal plasticizer, is wider in application range and better in effect compared with an existing plasticizer, and has a good application prospect and application value.

The present invention discloses an environmentally friendly rubber plasticizer and a preparation method and application thereof, and belongs to the field of polymer material processing. The preparation method of the rubber plasticizer provided by the present invention comprises mixing plant asphalt and sulfur, heating them for reaction, and then dehydrating them. The preparation method provided by the present invention can obtain an environmentally friendly rubber plasticizer product with relatively cheap raw materials, and the processing technology of the product is relatively simple, the equipment investment is relatively small, and it has a very broad application prospect. The present invention also provides a rubber plasticizer obtained by the above preparation method, and a reclaimed rubber whose preparation raw materials include the above rubber plasticizer.

The invention provides a TPE blood bag membrane material and a preparation method thereof, and solves the technical problems that an existing PVC blood bag membrane material is not environmentally friendly, not resistant to radiation and sterilization, poor in air permeability and the like. The TPE blood bag membrane material is prepared from the following raw materials in percentage by mass: 20 to 50 percent of SEBS, 5 to 20 percent of plasticizer, 30 to 60 percent of POE and 5 to 20 percent of EVA, the preparation method of the TPE blood bag membrane material comprises the following steps: S1, weighing the raw material components in percentage by weight; s2, fully and uniformly mixing the raw material components weighed in the step S1 to obtain a mixture; s3, carrying out melt extrusion and granulation on the mixture weighed in the step S2 through a twin-screw extruder; the method can be widely applied to the technical fields of polymer materials and medical application.

The invention relates to a shading ultraviolet-proof tarpaulin material and a preparation method thereof, and belongs to the technical field of tarpaulin materials, and the shading ultraviolet-proof tarpaulin material is prepared by the following steps: combining thiazolopyridine dicarboxylic acid with gallic acid, and then grafting polypropylene glycol monomethyl ether to obtain a plasticizing material; phosphonitrilic chloride trimer is combined with the plasticizing material, and the flame-retardant plasticizing material is obtained; graphene oxide is combined with a flame-retardant plasticizing material, so that an anti-ultraviolet auxiliary agent is obtained; the preparation method comprises the following steps: mixing an anti-ultraviolet auxiliary agent and polyvinyl chloride, melting, plasticizing and extruding, coating the mixture on the upper and lower surfaces of base cloth through curtain coating, cooling, sizing and coiling to finally prepare the shading and anti-ultraviolet tarpaulin material. According to the technical scheme, after the phosphonitrilic chloride trimer is combined with the plasticizing material, the graphene oxide is combined, and the prepared anti-ultraviolet auxiliary agent is added into the polyvinyl chloride, so that the mechanical property and the anti-ultraviolet property of a polyvinyl chloride matrix are improved, the flame retardant property of the polyvinyl chloride matrix is also improved, and the comprehensive performance of the tarpaulin material is overall improved.

The invention discloses aminated tung oil-based polyvinyl alcohol, a preparation method and application of the aminated tung oil-based polyvinyl alcohol in PBAT (poly (butyleneadipate-co-terephthalate)), and the preparation method of a composite material comprises the following steps: performing alcoholysis on tung oil by using ethanol, and then adding diethylenetriamine to perform amination on the alcoholysis tung oil under the action of a catalyst cobalt (II) terephthalate to obtain aminated tung oil; uniformly mixing the aminated tung oil with polyvinyl alcohol, and reacting to obtain an aminated tung oil plasticized polyvinyl alcohol material; and mixing the plasticized polyvinyl alcohol material with PBAT, and carrying out melt extrusion to obtain the tung oil-based polyvinyl alcohol / PBAT composite material. According to the invention, aminated tung oil is utilized to plasticize polyvinyl alcohol, and by means of chemical grafting and physical hydrogen bonds, tung oil macromolecules can inhibit outward migration of a plasticizer, so that the internal plasticizing performance of polyvinyl alcohol is maintained. The aminated tung oil-based polyvinyl alcohol can also generate stable chemical bonds with PBAT, so that the compatibility of the aminated tung oil-based polyvinyl alcohol and PBAT is improved, and the mechanical effect of the composite material is improved.

The utility model discloses a novel plastic particle base stock bin for silane crosslinking material production, and relates to the technical field of plastic particle storage bins. The device comprises a stock bin, the top of the stock bin is fixedly communicated with a feeding pipe and an air outlet pipe respectively, the bottom of the stock bin is fixedly communicated with a thickening pipe, the bottom of the thickening pipe is fixedly communicated with a discharging pipe, and a bin door is fixed to the outer wall of the stock bin through screws; the two pieces of visible glass are arranged on the outer wall of the stock bin and used for observing the condition in the stock bin; the two temperature sensors are arranged on the inner wall of the stock bin and used for detecting the internal temperature of the stock bin; and the hot-air blower is arranged on one side of the stock bin, and an air outlet of the hot-air blower communicates with an air inlet pipe. According to the utility model, people can conveniently know the material level condition in the stock bin, can heat and preserve heat of raw materials, and can filter iron tails, so that the product quality is improved, people can conveniently clean the stock bin, and the safety is improved.

The invention relates to a biodegradable polyester material as well as a preparation method and application thereof, and belongs to the technical field of compositions of high-molecular compounds. The biodegradable polyester material disclosed by the invention is prepared from the following components in parts by weight: 40 to 60 parts of biodegradable polyester, 30 to 45 parts of starch stearate, 5 to 15 parts of a plasticizer, 0.2 to 1.5 parts of an anhydride compound, 0.5 to 1.5 parts of an anti-hydrolysis agent and 0 to 2 parts of a processing aid, the biodegradable polyester is prepared from PBAT resin; the molar ratio of the structural units derived from terephthalic acid is greater than or equal to 49% based on the total molar weight of the structural units derived from terephthalic acid and adipic acid in the PBAT resin. The biodegradable polyester material has good mechanical properties and excellent damp-heat aging resistance.

The invention relates to a grain fiber-PVC (polyvinyl chloride) composite foamed sheet with a surface co-extrusion layer and a preparation method of the grain fiber-PVC composite foamed sheet. Comprising a middle foaming layer and a surface co-extrusion layer, and the middle foaming layer and the surface co-extrusion layer both comprise PVC resin and rice hull powder. The rare earth composite stabilizer is added, so that the environment-friendly function is achieved, the rare earth stabilizer further has the coupling, reinforcing and brightening functions in the PVC material, and in addition, the rare earth composite stabilizer can further adjust the decomposition temperature of the foaming agent and achieve the effects of toughening and capacity increasing; the foaming agent is prepared by compounding an AC foaming agent and an NC foaming agent, so that the extrusion rate can be increased, meanwhile, the dimensional deviation of the product is reduced, and the surface hardness can reach about Shore D hardness 80; the weight ratio of the rare earth compound stabilizer to the foaming agent to the foaming regulator is (1-5): (0.5-1.6): (3-9). Plasticization in the processing process can be promoted, and meanwhile, the mechanical property of the material is improved.

A tire tread rubber composite material based on high extraction resistance liquid rubber and a preparation method thereof. The present invention belongs to the field of rubber materials and their preparation. The purpose of the present invention is to solve the technical problems of poor extraction resistance and decreased mechanical properties of traditional plasticizers. The material of the present invention is prepared from olefin rubber, iron-based butyl-pentane liquid rubber, zinc oxide, plasticizer, sulfur, accelerator and antioxidant, and the olefin rubber is mixed with natural rubber, butadiene rubber, styrene-butadiene rubber and iron-based butyl-pentane rubber, and the molecular weight of the iron-based butyl-pentane liquid rubber is 0.5-5w, and the total content of vinyl side groups and propenyl side groups is 30-60%. The present invention introduces iron-based butyl-pentane liquid rubber into the rubber formula, while ensuring the processing performance of the rubber composite material, the extraction resistance rate is increased by 70%, and the mechanical properties of the rubber material are improved, the tensile properties are increased by about 10.34%, and the tear resistance is increased by about 11.54%.

The invention relates to an amide compound and a preparation method and application thereof. The amide compound has the following structural general formula: # imgabs0 #; in the formula, R1 contains an alicyclic group of C5-C10; n1 is an integer from 9 to 15, and n2 is greater than or equal to 2. The amide compound can be added into a polymer as a plasticizer, so that the heat resistance of the polymer is improved, and the mechanical property of the polymer is improved.

The invention provides a processing method and device for a light-emitting carrier with a starry sky bright effect and a vehicle lamp. The processing method for the light-emitting carrier comprises the steps that a mold is in a mold closing state, and raw materials are added into an injection molding cavity from a hopper; rotating the screw body, heating the raw material, and screwing the raw material into one end, close to the discharge port, of the screw body to form a skin material; the screw body moves in the direction away from the discharge port, meanwhile, gas is introduced into the gas inlet, and a core material with bubbles is formed on the side, away from the discharge port, of the skin material; and the screw body moves towards the discharging opening, the skin material and the core material are sequentially pushed into the mold, and the skin material is filled with the core material. The injection molding method solves the problem that the existing injection molding method of the light-emitting carrier is inconvenient to display the babysbreath type three-dimensional suspension effect.

This invention discloses a screw element for stretch-based reinforced compounding and an extrusion system for a screw extruder. The screw element includes a sleeve with a bottom groove having an outer wall surface twisted by 180° to form a torsional plane. Adjacent bottom grooves have raised ribs, the helical direction of which is consistent with the bottom groove. The height of the raised ribs increases and then decreases helically along the axis of the sleeve, while the width of the raised ribs also increases and then decreases helically along the axis of the sleeve, causing the width of the bottom grooves to decrease and then increase helically. Furthermore, the change in the width of the raised ribs is positively correlated with the change in their height. This invention features unique bottom grooves and raised ribs; the channels formed by the bottom grooves and raised ribs provide stronger stretching action, and the stretching flow field is uniformly distributed in all directions, resulting in superior melting and plasticizing effects on materials.

This utility model relates to the field of extruder screw technology and discloses a screw-separated double-barrier pin-type mixing structure, including a screw with screw ribs on its surface. The front section of the screw is configured as a feeding section, and the middle section of the screw ribs includes a main screw rib and a secondary screw rib. This utility model, through the separation-type double-screw rib design composed of the main and secondary screw ribs, allows the material to be fully tumbled to the B section after being heated and compressed in the A section. This process creates an effective separation effect, enhancing the plasticizing effect of the material and ensuring the uniformity of the molten material. By evenly arranging pins around the bottom diameter of the screw ribs, the material can be effectively stirred and mixed, further improving the mixing effect, especially when dealing with high-viscosity materials, improving the uniformity of mixing and ensuring the consistency of the final product quality.

The utility model discloses a high-mixing and high-efficiency injection molding screw rod and an injection molding machine. The injection molding screw rod comprises a mounting section, a blanking section, a separation section and a mixing section which are sequentially arranged in the conveying direction, the discharging section comprises a transition section and a conveying section, the discharging section is of a single-thread structure, and the thread pitch of the discharging section is kept unchanged; the bottom diameter of the transition section is gradually reduced, and the bottom diameter of the conveying section is kept unchanged. According to the high-mixing and high-efficiency injection molding screw provided by the utility model, the transition section is gradually reduced along the conveying direction, so that larger stress concentration caused by sudden change of the shaft diameter at the intersection of the mounting section and the blanking section is avoided, the risk that the position is twisted off is greatly reduced, and the anti-fatigue characteristic and the reliability of the screw are improved. Meanwhile, due to the existence of the transition section, the depth of the discharging groove can be properly increased, and the conveying capacity of raw materials of the discharging section is improved.

This invention proposes a screw barrel accessory for high-speed, high- and low-pressure blown film extrusion equipment, applicable to blown film extruders. The screw includes a feed end and a discharge end at its two ends. Along the axial direction from the feed end to the discharge end, the screw sequentially features equal-depth screw groove sections, wavy gradient screw groove sections, a diamond sorting area, another wavy screw groove section, and a four-in, four-out multi-channel structure. This invention optimizes material plasticization, dispersion, flowability, and pressure control through a combination of wavy screw grooves, a dense tooth structure, a diamond sorting area, and a through-hole structure. The wavy and gradient screw grooves utilize a special structure to perform multiple shearing and kneading operations on the material. Simultaneously, the orderly arrangement of functional sections and the reasonable axial segment dimensions ensure smooth and stable screw operation, making it suitable for long-term continuous operation in high-speed, high- and low-pressure blown film production lines. This reduces the defect rate, improves overall production efficiency and economic benefits, and the integrated structural design enhances the overall strength of the screw.

The invention belongs to the technical field of high polymer material modification, and relates to a high-elasticity and high-stability PVC (Polyvinyl Chloride) granule, a preparation method and application in a medical catheter. The granules are prepared from the following raw materials in parts by weight: 100 parts of PVC resin powder, 50-60 parts of a plasticizer, 5-10 parts of epoxidized soybean oil, 0.6-1.5 parts of a composite heat stabilizer, 0.4-6 parts of an elastomer, 0.4-0.8 part of a processing aid and 0.1-0.4 part of a lubricant, and the granules are obtained by pre-plasticizing the raw materials, performing melt extrusion through an extruder and performing granulation molding. A high-elasticity and high-stability medical catheter body can be obtained by carrying out melting secondary extrusion molding on the granules, a medical catheter product can be obtained by assembling the catheter body, and the medical catheter product comprises infusion, nursing or implantation intervention type medical catheters. The high-elasticity and high-stability PVC aggregate has excellent elasticity, tensile toughness, thermal stability and long-term stability, and can endow a catheter with excellent elasticity and stability when being applied to medical catheter products.

The utility model provides a pipe extrusion screw which solves the problem that an existing screw structure is not ideal in mixing and plasticizing effect. The first plasticizing section is arranged at the discharging end of the feeding section; the second plasticizing section is arranged between the first plasticizing section and the homogenizing section, and the second plasticizing section is longer than the first plasticizing section; the auxiliary screw flights are arranged on the second plasticizing section, the height of the main screw flights is larger than that of the auxiliary screw flights, the distances between the auxiliary screw flights and the front and back adjacent main screw flights form a main screw groove and an auxiliary screw groove respectively, the depth of the main screw grooves is gradually shallower in the feeding direction, and the depth of the auxiliary screw grooves is gradually deeper in the feeding direction. A mixed material enters the first plasticizing section through the feeding section to be preliminarily plasticized and then enters the second plasticizing section, part of the unplasticized mixed material is located in the main spiral groove, and the mixed material is completely plasticized along with the fact that the depth of the main spiral groove is gradually shallower in the feeding direction and the shearing force is gradually increased. And the plasticized mixed material is changed into a melt, and the melt flows into the auxiliary screw groove from the top of the auxiliary screw flight.

The invention discloses extrusion molding equipment suitable for processing P34HB and a P34HB modified material suction pipe. The extrusion molding equipment comprises extruder equipment and vacuum sizing water tank equipment, the extruder equipment comprises an equipment rack part, a power and transmission part, a barrel screw and heating part and a mold part; the vacuum sizing water tank equipment comprises an equipment rack part, a water tank part and a water circulation part. The method specifically comprises the following steps: adding P34HB and modified particles thereof from a feeding port of a machine barrel of an extruder, melting and plasticizing the particles by a screw rod rotating at a certain rotating speed in the machine barrel and an external heater, quantitatively extruding the material into a shaping mold by the screw rod, extruding P34HB and modified suction pipes thereof by the mold under high pressure, entering vacuum sizing water tank equipment, and carrying out vacuum sizing on the P34HB and modified suction pipes to obtain the P34HB and modified particles. Through vacuum and water bath shaping of the vacuum section, different specifications of P34HB and P34HB modified material suction pipe products with stable wall thickness, pipe diameter and roundness can be obtained.

The invention relates to the technical field of polyester polyol, in particular to a preparation method of low-viscosity polyester polyol, which comprises the following steps: compounding linear polyester polyol, rigid branched polyester polyol and flexible branched polyester polyol according to a specific ratio, and introducing the branched polyester polyol into the polyester polyol, thereby obtaining the low-viscosity polyester polyol. Wherein the rigid branched polyester polyol can effectively improve the thermal stability of the polyester polyol and has a better plasticizing effect, the flexible branched polyester polyol effectively makes up the defects of high material viscosity and reduced fluidity caused by too high crosslinking degree and branching degree of the rigid branched polyester polyol, and meanwhile, the linear polyester polyol is compounded, so that the mechanical properties of the rigid branched polyester polyol and the flexible branched polyester polyol are greatly improved. According to the preparation method, the problems of brittleness increase and high processing difficulty caused by overhigh material rigidity are avoided, and the finally obtained polyester polyol has relatively high fluidity and relatively low viscosity and has a wide application prospect.

The invention belongs to the technical field of injection molding, and relates to a mixing component and an injection molding machine with the same. The mixing component comprises a mixing barrel body and a mixing and shunting inner barrel; a melting runner is arranged in the mixing barrel body in the axial direction, one end of the mixing runner is a feeding end, and the other end of the mixing runner is a discharging end; the mixing and shunting inner barrel is arranged on the inner wall of the melting runner; wherein the inner surface of the mixing and shunting inner cylinder is provided with net-shaped columns which are stacked and arranged along the axial direction. The designed mixing and shunting inner barrel aims at improving the flowing activity of molten plastic, so that mixing is more uniform, and the mixing effect is enhanced; the net-shaped columns designed in the mixing and shunting inner barrel can shear the materials, the materials are layered through the net-shaped columns, and the speed difference between vortex and fluid is treated, so that the overall homogenization can be realized. When the mixing component disclosed by the invention is used for mixing a material with a certain solid-phase material, a better effect can be exerted, so that the color mixing and plasticizing effects of the material are more excellent.

The invention relates to the technical field of polymer nylon materials, in particular to an environment-friendly modified nylon material and a preparation method thereof, and aims to solve the problem of poor heat resistance of nylon materials in related technologies. The preparation method of the environment-friendly modified nylon material comprises the following steps: S1, adding equal amounts of oxalic acid and 1, 6-hexamethylenediamine into a reaction kettle, heating to 180-200 DEG C, uniformly stirring, adding tetrabutyl titanate, heating to 250 DEG C under the protection of nitrogen, and reacting for 3-4 hours to obtain a nylon head product; s2, providing a nylon head product, adding modified lignocellulose and nano boron nitride loaded with graphene quantum dots into the nylon head product, preheating at 70 DEG C for 1 hour, and uniformly mixing in a high-speed mixer to obtain a mixed material; and S3, adding the mixed material into a twin-screw extruder, adding zinc phytate, an antioxidant and a compatilizer at the same time, carrying out extrusion granulation, and in the extrusion process, adding a 30wt% triethanolamine solution according to 1.5% of the total mass of the mixed material to obtain the environment-friendly modified nylon material.

The present invention discloses butyrate-esterified SiO 2 / modified starch blend slurry, preparation method and application, S1: corn starch is dispersed in distilled water, diluted hydrochloric acid is added to react, after the reaction, alkali neutralization, filtration, washing, drying and crushing are performed to obtain acid-decomposed starch ATS; acid-decomposed starch is dispersed in distilled water, and cationic etherifying agent and CaO are added in sequence to react, after the reaction, acid neutralization, washing, drying and crushing are performed to obtain quaternary ammonium cationic starch QS; quaternary ammonium cationic starch QS is dispersed in distilled water, and butyric anhydride is added to react to obtain modified starch QBS; S2: nano-SiO 2 It is mixed with distilled water to form a dispersion, butyric anhydride is added and reacted under alkaline conditions, and after the reaction, butyric acid esterified SiO is obtained after washing and drying. 2 ; S3: butyrate SiO in S2 2 The mixture is mixed with distilled water to form a dispersion, and then the modified starch QBS in S1 is added and mixed evenly to obtain a blended slurry. The spinning treated with the slurry of the present invention significantly improves the wear resistance, breaking strength and hairiness reduction rate.

The application belongs to the technical field of wire and cable production equipment, and particularly relates to a screen type honeycomb plate, which comprises oppositely arranged installation mother plates and installation daughter plates, the installation mother plates are internally provided with first honeycomb plates, the installation daughter plates are internally provided with second honeycomb plates, and screen plasticizing gaps for glue to pass through are formed between the first honeycomb plates and the second honeycomb plates. The first honeycomb plates and the second honeycomb plates are respectively arranged in the installation mother plates and the installation daughter plates, the honeycomb-shaped flow guide groove groups of the two are arranged in a staggered manner to form adjustable screen plasticizing gaps, the glue generates strong turbulence, shearing and stretching effects in the process of flowing, the contact area of the glue with the honeycomb plates and the mixing uniformity are greatly increased, inherent dead angles existing in traditional screw plasticizing are eliminated, problems such as product bubbles, uneven thickness and insufficient mechanical strength caused by insufficient plasticizing of the glue are avoided, and the product quality and safety performance of the wire and cable are significantly improved.

The present invention relates to the field of polymer materials, and in particular to a composite material for a ship propulsion system and a preparation method thereof. The composite material comprises the following components, measured by weight: 45-60 parts of ultra-high molecular weight polyethylene, 5-10 parts of perfluoropolyether acrylate copolymer, 10-15 parts of ethylene-octene copolymer elastomer, 3-5 parts of nitrile rubber, and 4-8 parts of ionic liquid grafted MXenes. According to tests, the composite material prepared by the present invention has a lower dry friction coefficient and a wet friction coefficient under water lubrication conditions, a small volume wear rate, and can be suitable for a water-lubricated stern bearing of a ship propulsion system.

The invention discloses high-performance electric appliance insulation protection glue and a preparation method thereof, and the insulation protection glue comprises the following components in percentage by weight: 5%-20% of butyl rubber, 1%-5% of polyisobutene, 0.5%-3% of carbon black, 10%-40% of aluminum hydroxide, 20%-50% of talcum powder, 5%-15% of light calcium carbonate and 5%-15% of naphthenic oil. Meanwhile, the polyisobutene, the carbon black, the aluminum hydroxide, the talcum powder, the light calcium carbonate and the naphthenic oil are added, the butyl rubber is extremely low in gas permeability, the air permeability of the butyl rubber is only 1 / 7 of that of natural rubber, and the steam permeability of the butyl rubber is 1 / 200 of that of the natural rubber, so that the butyl rubber has relatively good sealing performance, the sealing effect of the insulating protection glue can be effectively improved, and the insulating protection glue has relatively high sealing performance; meanwhile, the butyl rubber shows good stability at a high temperature, can be used for a long time at 100 DEG C or a slightly low temperature, has relatively good anti-aging use performance, effectively improves the service life and the use stability, and has good shock absorption capability, so that the rubber has relatively good shock absorption and damping effects.

The invention provides polyimide for gas separation and a manufacturing method and application thereof, and relates to the technical field of high polymer materials, the polyimide comprises the following components by mass: 80%-99.5% of fluorine-containing polyimide, 0.5%-20% of polyimide containing unsaturated end groups and 0.05%-5% of a catalyst; according to the invention, fluorine-containing polyimide is compounded with unsaturated terminal group-containing polyimide with a specific structure and a catalyst, so that a novel polyimide material which can be processed in a solution and can be thermally crosslinked under a mild condition is successfully developed. The material keeps the inherent high heat resistance and mechanical properties of polyimide, and more importantly, the carbon dioxide plasticizing resistance is remarkably improved while good gas permeability is kept through molecular design. In addition, after being prepared into a gas separation membrane, the gas separation membrane shows excellent selective stability for a long time or in a high-pressure carbon dioxide environment.

The invention relates to the technical field of foaming materials, in particular to a polypropylene foaming material and a preparation method thereof. The polypropylene foaming material comprises the following components in parts by weight: 88-96.5 parts of polypropylene resin, 0.5-2 parts of a sensitizing agent, 2-5 parts of a nucleating agent and 1-5 parts of other auxiliary agents. The preparation method of the polypropylene foaming material comprises the following steps: S101, uniformly mixing polypropylene resin, a sensitizing agent, a nucleating agent and a compound additive according to a ratio to obtain a mixed material; s103, feeding the mixed material into an extruder, and carrying out extrusion granulation; s105, carrying out irradiation crosslinking on the extrudate obtained in the step S103; and S107, performing blow molding, extruding and foaming to obtain the polypropylene foaming material. The polypropylene foaming material is high in foaming ratio.