1566 results about "Molecular materials" patented technology

The invention discloses spherical aluminum oxide and a silicone rubber heat conduction composite material thereof, and belongs to the technical field of functional polymer materials. The spherical aluminum oxide is subjected to surface modification through an amphiphilic fluorosilicone heat conduction interface synergist; comprising the following raw materials in parts by weight: 100-200 parts of vinyl silicone oil, 1-6 parts of side hydrogen-containing silicone oil, 1-6 parts of end hydrogen-containing silicone oil, 0.2-2 parts of a platinum catalyst, 0.01-0.1 part of an inhibitor and 2500-6000 parts of amphiphilic fluorine-silicon heat-conducting interface synergistic spherical aluminum oxide powder. Through surface modification of spherical aluminum oxide, the prepared silicone rubber heat-conducting composite material realizes synergistic gain of heat conduction, insulation and flexibility, and can meet the requirements of multiple fields such as power battery pack heat dissipation gaskets, high-frequency circuit packaging and wearable equipment.

The invention discloses a polylactic acid injection molding mold based on a gradient heat conduction composite structure and a heat management method thereof, and belongs to the technical field of high polymer material molding processing equipment.The polylactic acid injection molding mold comprises a) a surface high heat conduction layer which is made of a copper-based composite material, has the heat conduction coefficient larger than or equal to 400 W / m.K and is used for rapidly and directionally transferring heat to the surface of a mold cavity; and b) an intermediate transition layer composed of a titanium alloy porous structure. High-efficiency production is realized through innovative design and advanced technology. Integrated metallurgical bonding of the gradient heat conduction structure is achieved through the selective laser melting technology, and the heat flow directivity is enhanced; the dual-mode cooling system is combined with closed-loop temperature control, and the temperature is accurately regulated and controlled; the high-performance material improves the comprehensive performance of the mold; and the structural stability is guaranteed through accurate technological parameters. According to the thermal management method, through multi-physical field simulation optimization, rapid heating and cooling are achieved, the forming period is shortened to 16-18 seconds, the calculation efficiency is improved by 80%, and the production efficiency and the product quality are effectively improved.

The invention discloses a multi-layer controllable degradation coating composition as well as a preparation method and application thereof, and belongs to the field of biodegradable high polymer materials and coating compositions. The coating composition comprises an outer protective layer and an inner functional layer, and the inner functional layer is arranged between a substrate and the outer protective layer and comprises a plurality of microcapsules. The key innovation lies in that the microcapsule encapsulates an enzyme capable of catalytically degrading the outer protective layer and is configured to be released after a predetermined delay time. The pH buffer system is integrated in the inner functional layer, and an optimal catalytic microenvironment is created for released enzyme, so that the outer protective layer is actively and quickly degraded, and programmable time-controlled removal is realized. The problem that the degradation rate of an existing biodegradable material is passive and uncontrollable is solved, and the coating has a remarkable application value in the field of seed coating or fertilizer controlled release by endowing the coating with a unique two-stage degradation characteristic.

The invention relates to the technical field of solar cells, and mainly provides a perovskite solar cell and a preparation method thereof. The perovskite solar cell comprises a substrate, a transparent conductive oxide layer, an anchoring layer, a hole transport layer, a perovskite light absorption layer, an electron transport layer and a top electrode which are stacked in sequence, wherein the material of the anchoring layer comprises a metal oxide; and the material of the hole transport layer comprises a self-assembly molecular material. According to the perovskite solar cell in the technical scheme of the invention, the anchoring point of the SAM is enhanced, the long-term stability of the perovskite cell is improved, and the efficiency loss caused by local electric leakage is reduced.

The invention discloses a self-assembly material, a solar cell and electric equipment, the self-assembly material comprises a first self-assembly molecular material, the structural formula of the first self-assembly molecular material is # imgabs0 #, Ar represents an aryl group, the Ar comprises at least one coordination atom, the coordination atom comprises lone pair electrons which are not bonded, and the first self-assembly molecular material comprises a second self-assembly molecular material, a third self-assembly molecular material and a fourth self-assembly molecular material, the coordination atoms comprise one or more of phosphorus atoms, arsenic atoms, sulfur atoms and selenium atoms; l comprises one or more of a carbon-containing group, a nitrogen-containing group, an oxygen-containing group, a silicon-containing group, a phosphorus-containing group and a sulfur-containing group, and n is 0-10; a comprises a hydrophilic group. When the self-assembly material is used for passivating the light absorption layer of the solar cell, a better passivation effect can be realized, and the photoelectric conversion efficiency and the stability of the solar cell can be improved.

The invention discloses a wear-resistant and impact-resistant composite PVC material and a preparation method thereof, and belongs to the technical field of high polymer materials, the wear-resistant and impact-resistant composite PVC material comprises the following raw materials by weight: 80-100 parts of epoxy polyvinyl chloride, 10-15 parts of a plasticizing stabilizer, 10-12 parts of an impact modifier, 0.5-2 parts of a lubricant, 5-10 parts of a filler, 2-3 parts of an antioxidant and 2-3 parts of a heat stabilizer; the preparation method comprises the following steps: preparing a metal soap stabilizer, absorbing pyrolysis gas, decomposing to generate metal chloride, enhancing the flame retardant property of the material, and uniformly dispersing the metal soap stabilizer as a filler in the material, so that an epoxy group in the prepared modifier absorbs hydrogen chloride and hybridizes a polyvinyl chloride chain segment at the same time, thereby enhancing the flame retardant property of the material. And a double-bond structure reacts with pyrolysis free radicals to generate an annular structure, so that the impact resistance of the material is enhanced.

The invention discloses a high-strength polyethylene film and a preparation method thereof, and relates to the technical field of high polymer materials. The invention discloses a high-strength polyethylene film. The high-density polyethylene composite material is prepared from the following raw materials in parts by weight: 35 to 45 parts of high-density polyethylene, 25 to 35 parts of linear low-density polyethylene, 12 to 18 parts of ethylene-vinyl acetate copolymer, 5 to 10 parts of nano silicon dioxide, 3 to 7 parts of organic montmorillonite, 1.5 to 3.5 parts of hindered amine light stabilizer, 1.5 to 2.5 parts of antioxidant 1010, 0.8 to 1.2 parts of calcium stearate, 0.8 to 1.2 parts of zinc stearate, 0.8 to 1.2 parts of silane coupling agent and 4 to 6 parts of maleic anhydride grafted polyethylene. The composite material is prepared from the following components in parts by weight: 1.5-3.5 parts of a quaternized chitosan-nano silver compound, 6-9 parts of a modified toughening agent, 4-7 parts of a modified heat-resistant agent, 1.5-3.5 parts of a processing aid, 0.15-0.35 part of dibenzoyl peroxide and 0.5-1.5 parts of a nucleating agent DBS. The composite material is excellent in comprehensive performance, high in strength, good in flexibility and puncture resistance, excellent in aging resistance, heat resistance, chemical resistance and antibacterial property, good in processability, capable of meeting the requirements of multiple fields such as packaging and agriculture, scientific in preparation method and high in practical value.

The invention discloses a high-weather-resistance halogen-free flame-retardant polyamide composite material and a preparation method thereof, and belongs to the technical field of high polymer materials. The composite material comprises the following raw materials in parts by weight: 20-60 parts of polyamide resin A, 0-20 parts of polyamide resin B, 10-50 parts of glass fibers, 0.1-2 parts of an ultraviolet absorbent, 0.1-2 parts of a free radical scavenger, 10-20 parts of a halogen-free flame retardant, 1-15 parts of a flame retardant synergist and 0.5-5 parts of a conventional auxiliary agent. The preparation method comprises the following steps: uniformly mixing the polyamide resin A, the polyamide resin B, the ultraviolet absorbent, the free radical scavenger, the flame-retardant synergist and the conventional auxiliary agent in a high-speed mixer according to the proportion to obtain a mixture, then adding the mixture into a double-screw extruder through main feeding, side feeding of the halogen-free flame retardant through a first side feeding and side feeding of the glass fiber through a second side feeding, and carrying out extrusion molding to obtain the flame-retardant polyamide composite material. And carrying out melt blending and extrusion granulation to obtain the high-weather-resistance halogen-free flame-retardant polyamide composite material. The obtained high-weather-resistance halogen-free flame-retardant glass fiber reinforced polyamide composite material is excellent in mechanical property, flame retardance and weather resistance.

The invention discloses a high-strength PET composite material and a preparation method thereof, and relates to the technical field of polymer materials. The invention first adds fumed silica during the preparation of graphene aerogel, and the siloxy groups on the surface of the fumed silica combine with the hydroxyl groups of the graphene oxide hydrogel, and the aerogel is mixed after heat treatment, which can improve the strength of the composite material and achieve excellent hydrophobic effect; secondly, dopamine is grafted on the surface of the aerogel, and the amino groups of the dopamine and the silanol groups of the silica undergo dehydration condensation to form a composite swelling layered silicate to prepare a hybrid filler; dopamine improves the dispersibility and compatibility of the filler in PET; when fine cracks appear in the composite material due to aging, the swelling layered silicate and the dopamine rainwater work together to achieve a self-repairing effect, and can also remove free radicals, so that the strength of the composite material is stable and the anti-aging performance is improved. The PET composite material prepared by the invention has high strength and anti-aging effects.

The invention discloses a polyurethane composite material embedded with a liquid repair network and a preparation method thereof, and belongs to the technical field of high polymer materials, the polyurethane composite material comprises 40-60 parts of a polyurethane prepolymer, 5-20 parts of repair agent carrier particles, 10-30 parts of a liquid repair agent and 0.1-1 part of a dispersant. The composite material provided by the invention solves the problems that a polyurethane material is easy to damage and low in repair efficiency in long-term use. The composite material disclosed by the invention has rapid, efficient and self-adaptive repairing performance under large-scale damage and multiple damage, is suitable for complex environments such as acid-base and high temperature, and has important application prospects in the fields of various industrial equipment, flexible electronic equipment, automobiles, buildings and the like.

The invention discloses a high-strength nano composite stiffening filling master batch and a preparation method thereof, and relates to the technical field of high polymer materials, the raw materials comprise a nano filler, a matrix material and a functional additive; the nano filler comprises nano diamond, nano silicon carbide and bio-based nano cellulose, the base material comprises polyimide, polyether-ether-ketone and bio-based polylactic acid, and the functional additive comprises a hindered phenol antioxidant, a nano aluminum hydroxide flame retardant, a nano silicon dioxide reinforcing agent, an ultraviolet light absorber, a carbon nano tube and nano silver particles. Nano-diamond, nano-silicon carbide and bio-based nano-cellulose are adopted as nano-fillers, polyimide, polyether-ether-ketone and bio-based polylactic acid are combined as base materials, and a plurality of functional additives are added, so that the preparation of the high-strength nano-composite stiffening filling master batch is realized; and the problems of poor dispersibility, mechanical property damage, insufficient hardness and poor interface bonding of the traditional filler master batch can be solved.

The invention relates to the field of high polymer materials, and particularly discloses a high-transparency low-strength easy-to-tear film and a preparation method thereof. A high-transparency low-strength easy-to-tear film comprises an inner layer, a middle layer and an outer layer, and the inner layer is prepared from 38-50 parts of LDPE, 50-70 parts of I-type LLDPE, 1.5-2.5 parts of an anti-blocking agent, 2-2.8 parts of a slipping agent, 0.3-0.5 part of an antioxidant and 0.3-0.5 part of a PPA auxiliary agent; the middle layer is prepared from the following raw materials in parts by weight: 25 to 35 parts of No.1 LDPE (Low-Density Polyethylene), 25 to 35 parts of I-1 LLDPE (Linear Low-Density Polyethylene), 8 to 12 parts of HDPE (High-Density Polyethylene), 15 to 25 parts of butylbenzene block copolymer, 0.6 to 1 part of plasticizer, 0.2 to 0.4 part of antioxidant and 8 to 12 parts of filling master batch; and the outer layer is prepared from the following raw materials in parts by weight: 25-35 parts of No.1 LDPE, 60-80 parts of II-type LLDPE, an antioxidant and a plasticizer. The easy-to-tear film has the advantages of being easy to tear in the longitudinal and transverse directions, high in transparency and low in haze.

The invention relates to the field of high polymer materials, in particular to a burnthrough-resistant PC composite material and a preparation method thereof. According to the burnthrough-resistant PC composite material provided by the invention, the bromine flame retardant, the silicon flame retardant and the boron flame retardant are used as one of the components, during combustion, bromine is used for absorbing free radicals, so that the oxidation reaction is slow, heat is reduced, silicon and boron are crosslinked to form a B-Si vitrification protection layer, heat insulation and oxygen insulation are realized, the compactness of a carbon layer is complemented, a sinking carbon layer is formed, and matrix resin is prevented from being combusted; the melt strength of the PC composite material is synergistically improved, burnthrough is prevented, and the PC composite material has excellent burnthrough resistance and meets the requirements of new national standards. The invention further provides a preparation method of the burnthrough-resistant PC composite material, the method is simple in process and high in product benefit, and the technical problem of how to improve the burnthrough resistance of the PC composite material is efficiently solved.

The invention provides an intermediate layer structure for a solar cell and a preparation method and application thereof. The intermediate layer structure comprises a transparent conductive oxide layer, a self-assembled monomolecular hole transport layer and a self-assembled monomolecular connecting layer for connecting the transparent conductive oxide layer and the self-assembled monomolecular hole transport layer, the material of the self-assembled monomolecular hole transport layer is a self-assembled monomolecular material with a phosphonic acid end group; the material of the self-assembled monomolecular connecting layer is selected from one or two of a silane self-assembled monomolecular layer material or a carboxylic acid self-assembled monomolecular layer material, and the silane self-assembled monomolecular layer material and the carboxylic acid self-assembled monomolecular layer material have sulfydryl groups; the problems that in the prior art, the material coverage rate of a self-assembled monomolecular hole transport layer on a TCO is low, and the material distribution of the self-assembled monomolecular hole transport layer is not uniform are solved.

The invention discloses a technology for manufacturing a thin film by recycling and calendering a polytetrafluoroethylene material, and belongs to the technical field of high polymer material recycling and processing, the technology for manufacturing the thin film by recycling and calendering the polytetrafluoroethylene material comprises the following steps: crushing waste products, and carrying out three-stage screening impurity removal and melt index detection; after being cleaned by supercritical carbon dioxide, the qualified material is mixed with industrial by-product filler, waste tire rubber powder and the like, low-temperature mixing is conducted through a double-screw extruder, and mixing parameters are automatically regulated and controlled through a tension sensor; performing calendaring forming by a five-roller calendaring unit, preheating the first two rollers, performing differential stretching by the middle three rollers, engraving a micro groove by the third roller, and controlling the thickness precision to be + / -3% by an online thickness gauge; the film is slit after being compounded according to requirements, and scrap edges are crushed and recycled. The method realizes efficient recovery of waste polytetrafluoroethylene, and has the advantages of thorough impurity removal, stable performance, environmental protection and energy saving.

The invention relates to an outdoor anti-aging PP plate and a preparation method thereof, and belongs to the technical field of high polymer materials. The outdoor anti-aging PP plate comprises the following components in parts by weight: 40-80 parts of PP resin, 10-20 parts of glass fibers, 1-5 parts of an anti-aging modifier, 0.2-3 parts of a modified flame retardant, 0.1-1 part of a lubricant and 0.1-0.5 part of an antioxidant, hydroxybenzophenone in the modified anti-aging agent generates thermal vibration and releases energy when absorbing ultraviolet rays and being irradiated by the ultraviolet rays, and cooperates with butyltrimethoxysilane to protect the material from being damaged by the ultraviolet rays, and a maleimide group improves the glass transition temperature and the melting point and reduces the influence of high-temperature thermal aging; a B-O-C carbon layer is formed at a high temperature under the synergistic effect of boron and phosphorus of the modified flame retardant, flame-retardant gas is released, and the modified flame retardant and phosphorus-oxygen double bonds are synergistically flame-retardant, so that the flame-retardant property is remarkably improved; the outdoor anti-aging PP plate prepared by the invention not only has excellent anti-aging performance, but also has a good flame-retardant effect.

The invention relates to a method for calculating molecular weight of a biological macromolecular material based on an AI algorithm. Part of biopolymer materials are difficult to form monomolecular chains after being dissolved into an aqueous solution, the ionic liquid is selected as a dissolution system, the monomolecular chains can be well formed after the macromolecular materials are dissolved, and then rheological data after biomacromolecules are dissolved in the ionic liquid are tested by using a rheological method. According to the method, a Rouse model is selected as a polymer solution model, and key parameter values are obtained by measuring a large amount of data, training the model by using an AI algorithm and carrying out nonlinear fitting, so that the molecular weight value of the measured material is calculated. The calculation method has the characteristics of accuracy and rapidness, and can be well popularized to the field of computer research of high polymer materials.

The invention relates to a flame-retardant rubber and plastic thermal insulation material and a preparation method thereof, and belongs to the technical field of high polymer materials. The flame-retardant rubber-plastic thermal insulation material comprises the following components in parts by weight: 50-75 parts of nitrile rubber, 20-45 parts of PVC resin, 10-15 parts of a plasticizer, 1-10 parts of a foaming agent, 1-5 parts of a foaming promoter, 10-40 parts of a composite flame retardant and 2-6 parts of a modified anti-aging agent, cyclohexanehexol phosphate in the composite flame retardant is heated and dehydrated into phosphoric acid, a barrier layer is formed to inhibit release of combustible materials, and dimethylallylamine combusts to absorb heat and cooperates with phosphorus-oxygen double bonds for flame retardance; a pre-product in the modified anti-aging agent reacts with a free radical of a rubber molecular chain, so that the heat resistance and the aging resistance of the material are improved, a maleimide group enhances an intermolecular acting force, the rigidity and the heat resistance of the molecular chain are improved, and material aging caused by high temperature is reduced; the flame-retardant rubber and plastic thermal insulation material prepared by the invention not only has an excellent anti-aging effect, but also has good flame retardance.

The invention relates to a special engineering plastic polyethersulfone microcellular foam material and a preparation method thereof, belongs to the technical field of high polymer material foaming, and solves the problem that high foaming ratio, a microcellular structure and excellent mechanical properties cannot be simultaneously obtained when a macromolecular polyethersulfone material adopts an injection foaming technology in the prior art. The method comprises the following steps: step 1, pretreating raw materials; 2, melt blending: mixing the PES base material, the second component, the functional filler, the cross-linking agent and the foam stabilizer, carrying out melt blending, granulating, and drying to obtain granules; 3, injection foaming: injecting the granules into an injection machine, adding a composite foaming agent into the injection machine, mixing, and performing injection foaming molding to obtain an injection-molded foaming material; and 4, curing: irradiating the injection-molded foam material with rays to obtain the special engineering plastic PES microcellular foam material.

The invention belongs to the field of solar cells, and particularly relates to a hole transport layer, a perovskite solar cell and a preparation method. The hole transport layer comprises a NiOx layer and a self-assembly molecular layer, wherein the self-assembly molecular layer comprises a self-assembly molecular material and a surfactant. The perovskite solar cell comprising the hole transport layer has the advantages of high efficiency, high stability, low production cost and simple preparation process.

The invention provides an efficient composite material manufacturing method based on front-end polymerization initiation point design, relates to manufacturing of forming materials containing macromolecular substances, and belongs to the technical field of common technological processes of processing and batching of macromolecular materials. According to the invention, the epoxy resin composite material with excellent mechanical properties is rapidly prepared with low energy consumption by preparing the epoxy resin front-end polymerization solution and initiating front-end polymerization at multiple points. The method has the advantages of being high in designability, easy to operate and the like, and rapid and energy-saving manufacturing of the epoxy resin and the composite material thereof is achieved while the mechanical property is maintained through multi-point initiation of front-end polymerization. The method has a wide application prospect in batch production of epoxy resin and composite materials and manufacturing of large-scale structures.

The invention discloses a super-strong mute building drainage pipe and a preparation method thereof, and relates to the technical field of high polymer materials. Comprising the following raw materials in parts by mass: 100 parts of high-density polyethylene, 5-7 parts of a cold-resistant toughening agent, 8-12 parts of a synergist, 8-10 parts of a sound insulation filler and 0.3-0.5 part of an antioxidant. By introducing the synergist prepared from the components such as polyamine polyether methylene phosphonic acid, zinc nitrate hexahydrate, magnesium nitrate hexahydrate and the like, the sound insulation, flame retardance and smoke suppression capabilities of the drainage pipe can be effectively improved; by introducing the sound insulation filler prepared from the modified halloysite nanotubes, hydroxyl-terminated polydimethylsiloxane, aziridine cross-linking agent and the like, the sound insulation, flame retardance and smoke suppression capabilities of the drain pipe are further improved. Therefore, the drainage pipe prepared by the invention has a wider application prospect.

The invention belongs to the technical field of high polymer materials, and relates to a 5VA high-flame-retardancy ABS (Acrylonitrile Butadiene Styrene) resin composition and a preparation method thereof, and the resin comprises the following components in parts by weight: 65-75 parts of ABS resin; 3-8 parts of chlorinated polyethylene; 15-20 parts of an aromatic brominated flame retardant; 3-6 parts of an antimony flame retardant synergist; 3 to 6 parts of nano charring master batch and 0.1 to 0.5 part of anti-dripping agent; 0.2 to 0.5 part of an antioxidant; 0.5 to 1.0 part of light stabilizer; 0.5 to 1.0 part of lubricant; the preparation method comprises the following steps: stirring and fully mixing the raw materials in a high-speed mixer, conveying, shearing and mixing by a double-screw extruder on a screw, melting, compounding, homogenizing, drawing, cooling and pelletizing to obtain the 5VA high-flame-retardant ABS resin composition. Compared with the prior art, the invention solves the problems of poor flame retardance and low impact property of flame-retardant ABS resin thin-wall 5VA, is suitable for meeting the requirement of high flame retardance of 5VA, and is also suitable for application occasions of flame-retardant S.2 needle flame combustion standards.

The invention belongs to the field of high polymer materials, and particularly discloses a novel method for synthesizing a high-viscosity salt-tolerant sodium polyacrylate thickener and preparation of a three-in-one thickener, and the novel method comprises the following steps: weighing a certain amount of acrylic acid without a polymerization inhibitor, adding a certain amount of pure water, neutralizing with a NaOH solution with a certain concentration, slowly dropwise adding into the NaOH solution, and reacting at the temperature of 50-60 DEG C for 2-3 hours to obtain the high-viscosity salt-tolerant sodium polyacrylate thickener. The preparation method comprises the following steps: adding sodium acrylate into a sodium acrylate solution, keeping the temperature to be less than 40 DEG C, preparing a sodium acrylate neutralization solution with the neutralization degree of 80% and the solid content of 20-45%, and polymerizing under ultraviolet irradiation by using sodium sulfite (Na2SO3) and utilizing a UV photocuring technology, thereby obtaining the high-viscosity salt-tolerant sodium polyacrylate thickener. On the basis, the three-in-one thickening agent with high viscosity, salt resistance and moisturizing functions is further prepared, and wider application of the sodium polyacrylate thickening agent is developed.

The invention discloses a preparation method of an ultra-high molecular weight polyethylene biaxially oriented film, and relates to the field of high polymer materials, and the preparation method comprises the following steps: step 1, mixing ultra-high molecular weight polyethylene and polyethylene wax to obtain a composition; 2, melting and plasticizing the obtained composition, and extruding to form a thin-wall tubular film after melting and plasticizing; 3, the thin-wall tubular film is subjected to blowing, traction and rolling, and the final ultra-high molecular weight polyethylene film is obtained. The melt flowability of the ultra-high molecular weight polyethylene is improved by utilizing the polyethylene wax, and the polyethylene wax can participate in crystallization of the ultra-high molecular weight polyethylene by controlling the blow molding process, so that the mechanical property of the ultra-high molecular weight polyethylene biaxially oriented film is improved.

The utility model relates to the field of high polymer materials, in particular to a polyaryletherketone resin pre-impregnated line material winding and forming device which is used for preparing polyaryletherketone resin pre-impregnated line materials and comprises a translation table top, a material impregnating groove, a guide column and a tensioning pulley. According to the present invention, with the structural design such as a driving system and the like, the carbon fiber can be immersed in the polyaryletherketone resin at low cost and high efficiency to obtain the sheet-shaped prepreg, the sheet-shaped prepreg is subjected to hot pressing to form the polyaryletherketone resin-based composite material of the fiber fabric, and the composite material has characteristics of excellent strength, wide application, and easy promotion and application. Wide application prospects are realized in the fields of aviation, aerospace equipment and high-end civil use.

The invention relates to a cold-resistant PBT plastic and a preparation method thereof, and belongs to the technical field of high polymer materials. The cold-resistant PBT plastic comprises the following components in parts by weight: 90-100 parts of PBT resin, 2-15 parts of a cold-resistant modifier, 5-25 parts of a modified flame retardant, 0.1-1 part of an antioxidant, 2-12 parts of a compatilizer and 0.1-2 parts of a lubricant, a polyurethane monomer in the cold-resistant modifier improves the impact resistance of the material; the Si-O bond of the product b is high in bond energy, long in bond length and excellent in low temperature resistance; the polyacrylate monomer is easy to slide and sticky and low in crosslinking degree; boron and phosphorus in the modified flame retardant are synergistic, a B-O-C carbon layer is formed at high temperature, flame-retardant gas is released, and smoke is reduced; in addition, a Si-O system prevents combustion products from escaping, thermal degradation is inhibited, low-smoke flame retardance is achieved, and the cold-resistant PBT plastic prepared by the invention not only has excellent low-temperature-resistant toughness and impact resistance, but also has a good flame-retardant effect.

The invention discloses a degradable express bag material and a preparation method thereof, and relates to the technical field of high polymer materials. The invention discloses a degradable express bag material. The composite material is prepared from the following raw materials in parts by weight: 40 to 50 parts of poly (butylene adipate-co-terephthalate), 20 to 30 parts of polycaprolactone, 5 to 8 parts of modified bamboo fiber, 2 to 4 parts of modified nano montmorillonite, 3 to 6 parts of tributyl citrate, 0.1 to 0.3 part of antioxidant 1076, 1 to 2 parts of iron dithiocarbamate master batch, 2 to 3 parts of maleic anhydride grafted poly (butylene adipate-co-terephthalate) and 0.3 to 0.6 part of zinc stearate. 0.1 to 0.3 part of baicalein; and 1 to 3 parts of chitosan-sorbitol composite coating liquid. According to the degradable express bag material, poly (butylene adipate-co-terephthalate) and polycaprolactone are used as main degradable raw materials, modified bamboo fibers and modified nano-montmorillonite are matched to enhance the mechanical property, an antioxidant 1076, baicalein and the like are added to guarantee the stability and functionality, temperature is accurately controlled in the preparation process, multi-step modification is adopted for optimizing component combination, and the degradable express bag material is prepared. The performance is improved through the composite coating, degradability is achieved, and good usability is achieved.

The invention provides a method and device for evaluating weather resistance of a high polymer material, and relates to the technical field of aging tests of materials, and the method comprises the following specific steps: selecting a high polymer material sample to carry out an accelerated aging test, and obtaining accelerated aging conditions, mechanical property changes and appearance changes of different time periods according to a plurality of time periods; according to the method, the accelerated aging conditions in all time periods are averaged, correlation analysis is carried out, a plurality of environment severe coefficients are generated, the mechanical property changes in the adjacent time periods and the corresponding environment severe coefficients are calculated, different weather resistance coefficients are obtained, and the weather resistance of the material is comprehensively evaluated by comparing the different weather resistance coefficients with a preset threshold value. According to the method, the performance change of the material in the aging process is reflected from multiple aspects, so that the weather resistance evaluation is more comprehensive and truly matched with the performance of the material in actual use, the influence of each factor on the weather resistance of the high polymer material can be more accurately evaluated, and a more accurate basis is provided for the weather resistance evaluation.

The utility model discloses a thermoplastic cellular board, which belongs to the technical field of high polymer materials and comprises a cellular core and a surface layer completely wrapping the outer surface of the cellular core, and the surface layer comprises an upper surface layer, a lower surface layer and a side surface layer. Each of the upper surface layer, the lower surface layer and the side surface layer independently comprises a continuous fiber reinforced thermoplastic composite material sheet and a resin film; the surface layer is arranged on the outer surface of the honeycomb core, the edge of the honeycomb core can be effectively wrapped, the wrapped edge is attractive, the sealing performance is good, edge breakage is not prone to occurring, meanwhile, the upper surface layer, the lower surface layer and the side surface layer are made of the same materials, the honeycomb core can be effectively protected, the sealing effect of the honeycomb core can be effectively improved, the honeycomb plate has the flame-retardant, anti-aging and waterproof functions, and meanwhile the service life of the honeycomb plate is prolonged. And the compressive strength and the bending strength of the cellular board are greatly improved.