109 results about "Azodicarbonamide" patented technology

The invention discloses a high-weatherability sound insulation wood plastic wallboard and a preparation method thereof, the high-weatherability sound insulation wood plastic wallboard comprises the following raw materials by weight: 30-40 parts of wood flour or plant fiber, 25-35 parts of a sound insulation functional filler, 35-45 parts of high density polyethylene, 2-2.5 parts of maleic anhydride grafted high density polyethylene, 1-1.5 parts of stearic acid, 3-4.5 parts of a weatherability auxiliary agent, and 1-1.5 parts of azodicarbonamide. The problems of cracking, deformation and the like caused by moisture absorption expansion are relieved by optimizing the proportion and compatibility of the wood flour and the plastic, and then the problems of weather resistance and sound insulation of the wallboard outdoors are solved by filling the porous sound absorption material.

The invention belongs to the technical field of sole materials, and particularly relates to a quick-rebound fatigue-resistant sole foaming composite material and a preparation method thereof. According to the invention, the alpha-olefin ethylene copolymer and the modified ethylene-vinyl alcohol copolymer are mixed in an internal mixer, and hydroxyl groups of the modified ethylene-vinyl alcohol copolymer and the alpha-olefin ethylene copolymer form a hydrogen bond cross-linked network under the action of high-temperature shearing; a blend obtained through mixing, high-branching-degree polyolefin, modified nano-zinc oxide I and an auxiliary agent are added into a double-screw extruder for extrusion, the modified nano-zinc oxide is embedded into branching points of the high-branching-degree polyolefin, molecular chain slippage is limited through a pinning effect, the fatigue life of the composite material is prolonged, and the composite material is suitable for large-scale production. The preparation method comprises the following steps: preparing a foaming material, mixing the foaming material with azodicarbonamide, an antioxidant 1010 and the like, injecting the mixture into a supercritical device, effectively improving the density gradient, rebound resilience and mechanical properties through segmented pressure relief, and finally performing hot-pressing shaping to form the quick-rebound fatigue-resistant sole foaming composite material.

The invention relates to the technical field of shoe materials, in particular to a bio-based EVA-containing composite shoe material and a preparation method thereof, and the bio-based EVA-containing composite shoe material is prepared from the following raw materials in parts by weight: a bio-based EVA polymer, bio-based TPU, a cross-linking agent, a compatilizer, a nucleating agent, filler, a foaming agent, a plasticizer, a flexible component, a biodegradation accelerant, a non-polyolefin elastomer and maleic anhydride grafted polyethylene wax. Wherein the compatilizer can be ethylene-vinyl alcohol and the like; the nucleating agent can be nanoscale talcum powder and the like; the filler can be ethyl cellulose and the like; the foaming agent is an azodicarbonamide foaming agent; the biodegradation accelerant is prepared from immobilized lipase, a tannic acid-Fe < 3 + > complex and surface carboxylated TiO2. The preparation method comprises two steps of mixing granulation and supercritical foaming. The composite shoe material provided by the invention has good biodegradability, can reduce environmental pollution, and maintains excellent physical and mechanical properties at the same time.

The invention discloses a preparation method of a foamed thermal-insulation ceramic decorative plate in the technical field of building decorative materials. The method comprises the following steps: carrying out ball milling, spray drying, granulating and ageing on raw materials such as ceramic waste and kaolin; mixing and dispersing the aerogel-hydrogel gradient core-shell structure composite modified material and ceramic particles, and sieving to obtain composite powder; compounding sodium bicarbonate and azodicarbonamide with a foaming agent, mixing the foaming agent with the composite powder, and adding a surfactant and a dispersing agent to adjust the viscosity so as to prepare expandable ceramic slurry; the slurry is injected into a mold and coated with low-temperature glaze, and stepped heating sintering is conducted through a tunnel kiln and comprises the steps of preheating glue discharging, primary foaming, secondary sintering, gradient cooling and the like. The thermal insulation performance, the mechanical strength, the weather resistance and the decoration performance are synergistically improved, and the product is low in heat conductivity coefficient, high in compressive strength, excellent in ultraviolet aging resistance, firm in decoration layer combination and suitable for building outer walls and other scenes.

The invention relates to the technical field of sound insulation materials, in particular to flame-retardant epoxy resin composite diatomite sound insulation cotton and a preparation method thereof. The flame-retardant epoxy resin composite diatomite sound insulation cotton is prepared from epoxy resin, diatomite, a composite flame retardant, a coupling agent, a curing agent, a diluent, a foaming agent and a charring agent. The composite flame retardant at least comprises ammonium polyphosphate and melamine; the coupling agent is a silane coupling agent or a titanate coupling agent; the curing agent is methyl tetrahydrophthalic anhydride; the diluent is n-butyl glycidyl ether; the foaming agent is azodicarbonamide; the charring agent is pentaerythritol. By optimizing the diatomite modification process and combining physical dispersion and chemical modification means, the compatibility of the diatomite and the epoxy resin is greatly improved, the pain point of filler agglomeration in the traditional process is thoroughly solved, the porous sound insulation potential of the diatomite is fully released, and the sound absorption and sound insulation performance of the material is qualitatively improved.

The invention relates to the technical field of foaming materials, in particular to a high-damping EVA / EPDM composite foaming material and a preparation method thereof. The high-damping EVA / EPDM composite foam material is prepared from the following raw materials in parts by weight: 150 to 80 parts of ethylene-vinyl acetate copolymer, 20 to 50 parts of ethylene propylene diene monomer, 3 to 5 parts of azodicarbonamide, 1 to 3 parts of dicumyl peroxide, 10 to 12 parts of compound filler, 6 to 10 parts of maleic anhydride grafted ethylene-octylene copolymer, 2 to 4 parts of hydroxyl-terminated polybutadiene and 1 to 4 parts of triallyl isocyanurate, the compound filler is formed by compounding silicon dioxide microspheres, graphene aerogel microspheres and modified barium titanate nanoparticles according to the mass ratio of 1: (1.5-1.7): (1.5-1.8); the high-damping EVA / EPDM composite foam material prepared by the invention not only has better high-damping and low-resilience properties, but also has excellent tensile strength, and the quality of the high-damping EVA / EPDM composite foam material is effectively ensured.

The invention provides battery pack heat preservation foam with low compression strength. The problems that existing polyethylene foam is high in compression strength, insufficient in flame retardant property and the like in heat insulation, buffering and protection application of a new energy automobile battery pack are solved. The foam comprises the following components in parts by mass: 50-80 parts of low-density polyethylene, 10-20 parts of linear low-density polyethylene and 20-30 parts of ethylene-vinyl acetate copolymer as a resin matrix, 8-12 parts of azodicarbonamide, 1-3 parts of sodium carbonate and 1-3 parts of 4, 4 '-oxybisbenzenesulfonyl hydrazide are used as foaming agents; and 5-10 parts of a bromine-antimony flame retardant, 1-2 parts of a metallic soap lubricant and 1-3 parts of an antioxidant. The flame retardant grade of the foam reaches UL94HF-1, the compression strength is lower than 10kPa under 30% strain, and the aperture ratio of the foam is greater than or equal to 85%. The preparation method comprises the steps of internal mixing granulation, extrusion into sheets, irradiation crosslinking, heating foaming, physical rolling hole breaking and the like, and low compression strength, high aperture ratio and excellent flame retardance are realized by optimizing a resin blending system, a multi-stage foaming process and a physical rolling technology.

The invention relates to the technical field of polymer foam materials, and discloses a light EVA foam material based on intermittent foaming heating and a preparation method thereof. The ethylene-vinyl acetate copolymer adhesive is prepared from the following raw materials: an ethylene-vinyl acetate copolymer, a maleic anhydride grafted ethylene-vinyl acetate copolymer, azodicarbonamide, basic zinc carbonate, triallyl isocyanurate, stearic acid and dicumyl peroxide. During preparation, a double-machine-position stepped heating and mechanical mode locking transfer process is adopted. The first-stage heating is initiated by dicumyl peroxide to construct a covalent cross-linked skeleton; in the second-stage foaming heating process, basic zinc carbonate is heated and decomposed, and anhydride groups are promoted to be hydrolyzed and combined with released zinc oxide in situ to form ionic crosslinking. A double-order cross-linked network formed by covalent bonds and ionic bonds can absorb bubble expansion stress and stabilize an internal microstructure. According to the invention, the occurrence rate of cell merging and cracking under the condition of low density is reduced, and the foaming material with low apparent density and small compression set rate is obtained.

This invention discloses a method for preparing a three-dimensional integrated lumbar support cushion. The raw materials of the lumbar support cushion include: ethylene-vinyl acetate copolymer, polyether-type thermoplastic polyurethane elastomer, physically foamed microspheres, azodicarbonamide, caprolactam-blocked 4,4'-diphenylmethane diisocyanate, surface-modified copper nanowires, and silver-loaded silicone composite components. The preparation process is as follows: the matrix resin and modified copper nanowires are melt-blended at high temperature, and then mixed with the foaming system, crosslinking agent, and composite components at low temperature to obtain a blended base material; the blended base material is injection molded, followed by static differential temperature field for pressure holding and curing, and finally cooled and demolded. This invention utilizes copper nanowires to construct a thermally conductive network, which, combined with the external temperature difference, forms a continuous foaming ratio and crosslinking density gradient inside, eliminating the physical phase interface of traditional multi-material splicing, significantly improving the tear resistance and fatigue life of the transition zone; and utilizes cooling phase separation to form an anti-slip and antibacterial skin layer.

The invention discloses high-heat-insulation ceramic silica gel foam, and relates to the technical field of high-temperature-resistant silica gel. The high-heat-insulation ceramic silica gel foam is prepared from the following components in parts by mass: 100 parts of methyl vinyl silicone rubber, 15 to 40 parts of ceramic silicon resin, 15 to 25 parts of a flame retardant, 3 to 15 parts of fumed silica, 0.5 to 5 parts of hydrogen-containing silicone oil, 0.1 to 2 parts of a platinum catalyst, 2 to 10 parts of an azodicarbonamide foaming agent, 1 to 8 parts of a ceramic accelerant, 0.5 to 3 parts of a heat-resistant additive and 5 to 8 parts of reinforcing filler. Compared with the prior art, the material disclosed by the invention can quickly form a compact ceramic layer at a high temperature, can more effectively block heat transfer, avoids sharp reduction of mechanical properties or structural damage of the material in a high-temperature environment, and is more excellent in high-temperature use stability.

The application relates to the technical field of cable material manufacturing, and discloses a light-weight flexible wear-resistant electrical equipment connecting cable, a sheath of the connecting cable being made of raw materials including the following: polyester type thermoplastic polyurethane elastomer, styrene-acrylonitrile copolymer, maleic anhydride grafted polyolefin elastomer, blocked isophorone diisocyanate, wear-resistant premixed solution containing a catalyst, slow-release foaming master batch and functional additives; wherein the wear-resistant premixed solution containing the catalyst contains hydroxyl-terminated polydimethylsiloxane and a bismuth octoate catalyst, the slow-release foaming master batch contains modified azodicarbonamide foaming agent and carrier resin, and the functional additives contain antioxidants and carbodiimide hydrolysis stabilizers. According to the application, the hydroxyl-terminated polydimethylsiloxane containing the catalyst and the blocked isocyanate are introduced into the polyurethane matrix in cooperation through a reaction extrusion process, the isocyanate groups are unblocked at high temperature, and the organic silicon chain segment is chemically bonded with the matrix resin.

The application relates to the technical field of high polymer materials, and discloses an antistatic shoe sole material and a preparation method thereof, which is made of ethylene-vinyl acetate copolymer, ethylene-propylene rubber, cationic POE-carbon nanotube hybrid master batch, dicumyl peroxide, azodicarbonamide and zinc oxide. The cationic POE-carbon nanotube hybrid master batch is prepared by the following steps: pre-compounding alkenyl epoxy functionalized imidazole didodecyl double cationic connecting agent with acidized carbon nanotubes, and then melt grafting the ethylene-octene copolymer thermoplastic elastomer by one-step method; and the epoxy group further reacts with the carboxyl group on the surface of the carbon nanotubes. The application can construct an electronic-ion synergistic conductive network, has low addition amount, long-term antistatic property and high resilience.

The invention relates to a composite sponge for an automobile engine hood and a preparation method of the composite sponge. The composite sponge is prepared from the following components in parts by weight: 100 to 130 parts of polyurethane prepolymer, 20 to 30 parts of bismaleimide and furyl polyether copolymer, 12 to 20 parts of 6-(diphenoxy phosphine)-6H-dibenzoxphosphine or a derivative thereof, 12 to 20 parts of ammonium polyphosphate, 8 to 15 parts of nano silicon dioxide or montmorillonite, 12 to 20 parts of self-healing microcapsule, 1 to 3 parts of azodicarbonamide and 1 to 2 parts of zinc stearate. And 5 to 8 parts of a diisocyanate crosslinking agent. Wherein the self-healing microcapsule takes an aromatic ester or epoxy prepolymer as a core material and a urea formaldehyde condensate as a shell material, and the particle size is 20-80 microns. All the components are compounded under a specific process path to form a foam network structure with high-temperature shape memory and self-healing functions and efficient flame retardance, and the foam network structure is suitable for thermal protection application of an automobile engine compartment under complex working conditions.

The invention discloses a foamed low-dielectric low-dielectric-loss continuous long glass fiber reinforced polypropylene composite material, and relates to the field of long glass fiber reinforced polypropylene composite materials and preparation thereof, the material is prepared from the following components by mass: 20-60 parts of polypropylene resin; 20 to 60 parts of continuous glass fiber; 15 to 20 parts of homopolymerized PP (polypropylene); 5 to 12 parts of hollow glass beads; 3 to 7 parts of azodicarbonamide; 6 to 12 parts of mesoporous silica; 3 to 6 parts of graphene aerogel; 0.5 to 1 part of fluoride; 0.1 to 1.5 parts of a compatilizer; 0.1 to 2 parts of an antioxidant; and 1-2 parts of a lubricant. According to the invention, through combination of multiple components, introduction of gas micropores to reduce the effective dielectric constant of the material and introduction of the low-dielectric filler, the urgent demands of the fields of high-frequency communication, millimeter wave radar and the like on low-dielectric-constant and low-dielectric-loss materials are met.

The application discloses a preparation method of a liquid crystal polymer diaphragm and the liquid crystal polymer diaphragm. The preparation method comprises the following steps: providing a soluble liquid crystal polymer, dissolving the soluble liquid crystal polymer in a first solvent, stirring and mixing to obtain a first mixed solution. Fillers are added into the first mixed solution, and dispersion treatment and defoaming treatment are performed to obtain a slurry. The fillers comprise at least one of paraffin oil, aluminum triacetylacetone powder, azodicarbonamide, calcium carbonate powder, silica powder, sodium bicarbonate powder and starch powder. A substrate is provided, the slurry is coated on the substrate, and a wet film is formed on the substrate. The wet film is subjected to drying and curing treatment, and the fillers are removed to obtain a first film body with a porous structure. The first film body is peeled off from the substrate to obtain the liquid crystal polymer diaphragm. In the preparation process of the liquid crystal polymer diaphragm, the fillers are added, the fillers are used for occupying positions in the wet film and are removed, the porous structure in the liquid crystal polymer diaphragm is increased, and the porosity is improved.

The invention relates to the field of foamed plastic preparation, in particular to an environment-friendly noise-reducing pmi foamed plastic preparation method which comprises the following steps: 1, mixing a polybenzimidazole monomer, a catalyst and a polar solvent according to an optimal ratio of 4: 1: 2, and carrying out polymerization reaction under the conditions of the temperature of 180-250 DEG C and the pressure of 0.5-1.5 MPa to form a PMI resin prepolymer, in the reaction process, a proper amount of a noise reduction auxiliary agent is added at 200 DEG C to promote the noise reduction effect of the foam material. The environment-friendly raw materials are adopted, the specific catalyst (sodium chloride, ammonium chloride and the like), the foaming agent (azodicarbonamide) and the surfactant (lauryl sodium sulfate) are utilized, the raw materials show the characteristics of low toxicity and harmlessness in production and final products, the modern environment-friendly requirement is met, the influence on the environment is reduced, and the environment-friendly and environment-friendly foaming agent is suitable for industrial production. Therefore, the problem that a PMI foam material with excellent noise reduction performance is difficult to prepare by an existing noise reduction pmi foam plastic preparation method is solved.

The utility model relates to the technical field of stirring devices, and discloses a mixing stirrer for azodicarbonamide, which comprises a large helical ribbon and a small helical ribbon, the head end of the large helical ribbon and the head end of the small helical ribbon are respectively and fixedly connected to one side of a rotating shaft through a first connecting pipe and a second connecting pipe; the tail ends of the large helical ribbon and the small helical ribbon are fixedly connected to the other side of the rotating shaft through a third connecting pipe and a fourth connecting pipe correspondingly, one end of the rotating shaft is rotationally connected to one end of a water inlet main pipeline in a sealed mode, and the other end of the water inlet main pipeline is fixedly connected with the output end of a circulating water cooling mechanism; the other end of the rotating shaft penetrates out of the outer side of the box body and is rotationally connected with one end of a water outlet main pipeline in a sealed mode, the other end of the water outlet main pipeline is fixedly connected with the input end of a circulating water cooling mechanism, a U-shaped water tank shell is fixedly connected to the bottom of the box body, and a water inlet branch pipeline is fixedly connected to one side of the top end of the U-shaped water tank shell; the diagonal sides of the top end of the U-shaped water tank shell are fixedly connected with water outlet branch pipelines, and the material cooling function is achieved through a water circulation mechanism.

The application belongs to the technical field of polyvinyl chloride foam material preparation, and particularly relates to a polyvinyl chloride foam material for offshore operation and a preparation method thereof. The polyvinyl chloride foam material for offshore operation comprises polyvinyl chloride resin as a base resin, silane-modified aluminum borate nanometer whisker, 1-(9,10-epoxy octadecanoyloxy)-3-(2-methylprop-2-enoyloxy)propan-2-ol and oleic acid-modified Mg-Al-Zn ternary intercalation hydrotalcite as modified raw materials, 4,4'-diphenyl methane diisocyanate and 4,4'-dicyclohexyl methane diisocyanate are compounded to construct a soft and hard synergistic crosslinking network, azodicarbonamide, benzene-1,3-disulfonyl hydrazide and zinc oxide are compounded to form a foaming agent to realize gradient nucleation foaming, and a heat stabilizer, a light stabilizer and an antioxidant are further added. As a result, the synergistic effect between the raw materials enables the polyvinyl chloride foam material to have excellent salt mist resistance and impact resistance.

The invention discloses a mechanical fastening belt and a manufacturing method thereof, and relates to the technical field of mechanical fastening belts. The hook surface is compounded and fixed on the surface of one side of one end in the length direction of the base film through thermal forming; the base film is a modified base film added with a composite foaming system, and the composite foaming system is formed by compounding a physical foaming agent and a chemical foaming agent; the physical foaming agent is hollow glass beads, and the chemical foaming agent is azodicarbonamide. A composite foaming system formed by compounding hollow glass beads and azodicarbonamide is adopted in the base film, and the hook surface is compounded and fixed on the surface of one side of one end of the length direction of the base film through thermal forming, so that the uniformity of an internal bubble structure of the base film is improved; the problems that a traditional mechanical fastening belt is too high in gram weight, high in material cost and poor in use flexibility due to a single foaming system of a base film, and the compounding firmness of a hook face and the base film is insufficient can be solved.

The invention discloses a preparation method of a liquid crystal polymer film and the liquid crystal polymer film, and provides a soluble liquid crystal polymer, and the soluble liquid crystal polymer is dissolved in a first solvent to obtain a first mixed solution; adding a foaming agent, a dispersing agent and a foaming promoter into the first mixed solution, and carrying out dispersion treatment and defoaming treatment to obtain precursor slurry; the foaming agent is prepared from at least one of azodicarbonamide, p, p '-oxybisbenzenesulfonyl hydrazide and N, N'-dinitroso pentamethylene tetramine. Providing a substrate, coating the precursor slurry on the substrate, and forming a wet film on the substrate; and carrying out heat treatment on the wet film to obtain a first film body. And separating the first film body from the substrate to obtain the liquid crystal polymer film. The foaming agent, the dispersing agent and the foaming promoter have a synergistic effect to jointly construct a stable and efficient foaming system. The prepared liquid crystal polymer film has low dielectric constant and dielectric loss, and also has good mechanical properties.

The invention relates to a preparation method of an anti-aging high-resilience elastic material for a foaming process, and belongs to the technical field of foaming elastic materials. The preparation method comprises the following steps: putting an ethylene-vinyl acetate copolymer, a thermoplastic polyurethane elastomer, dioctyl phthalate, an anti-aging agent, a lubricant, a triazole ferrocene synergistic aid, an azodicarbonamide foaming agent and a dicumyl peroxide cross-linking agent into an internal mixer for internal mixing, and performing open mixing in an open mill to obtain a rubber sheet; putting the rubber sheet into a mold, putting the mold into a press vulcanizer, and carrying out vulcanization foaming to obtain an elastic material; the triazole ferrocene synergistic auxiliary agent is prepared from 3-vinyl-1, 2, 4-triazole, 1, 1-bis (dimethylsilyl) iron, anhydrous toluene and a chloroplatinic acid toluene solution, and the triazole ferrocene synergistic auxiliary agent is prepared from the following raw materials: 1, 1-bis (dimethylsilyl) iron, anhydrous toluene and a chloroplatinic acid toluene solution. The elastic material prepared by the invention has the advantages of excellent aging resistance, high compression resilience rate and good durability, and can maintain stable resilience performance in a long-term use process.

The application belongs to the field of shoe materials, and discloses a foaming agent and its use, which is composed of 30-40 parts of azodicarbonamide, 10-20 parts of active additive and 40-50 parts of ethylene-vinyl acetate copolymer in terms of mass fraction, the active additive is at least one selected from zinc oxide, metal weak acid salt and salicylic acid, and the salicylic acid must be contained; and the mass fraction of the salicylic acid in the active additive is 10-20%; the active additive and the azodicarbonamide are complexed according to the Lewis acid-base coordination principle, the intermediate overlapping degree of the -N-C- bond is reduced, and the secondary reaction of the foaming agent is reduced, so that the decomposition temperature of the foaming agent is reduced, and the release amount of ammonia gas in the decomposition process is reduced; in addition, the application further discloses a midsole prepared from the foaming agent and a preparation method thereof.

The application discloses an anti-aging and yellowing-resistant foamed polyester material and a preparation method thereof, and relates to the technical field of polyester materials. The anti-aging and yellowing-resistant foamed polyester material is prepared from the following raw material components in proportion by weight: 3-5 parts of anti-ultraviolet SEBS, 3.6-7 parts of triethylamine, 4-6 parts of a flame-retardant and wear-resistant filler, 100 parts of TPEE, 0.9-1.1 parts of a polymer wax, and 0.6-0.8 parts of a foaming agent. The anti-ultraviolet SEBS is obtained by copolymerization grafting of an unsaturated benzophenone ultraviolet absorber, SEBS and maleic anhydride. The flame-retardant and wear-resistant filler is obtained by mixing and reacting carboxylated nano silicon dioxide, pentaerythritol and phosphorus oxychloride. The polymer wax is EVA wax. The foaming agent is azodicarbonamide. The anti-aging and yellowing-resistant foamed polyester material has good mechanical properties, anti-aging performance, flame-retardant performance and compression resistance.

The invention discloses an anti-fouling PCR ABS laser etching material and a preparation method thereof, and relates to the technical field of PCR ABS material modification and laser etching function integration. The anti-pollution PCR ABS laser etching material has the advantages that the anti-pollution PCR ABS The invention discloses a PCR (Polymerase Chain Reaction) ABS (Acrylonitrile Butadiene Styrene) resin composition, which is prepared from the following raw materials in parts by weight: 50 to 90 parts of PCR ABS resin, 6 to 10 parts of modified organic silicon micro powder, 2 to 15 parts of modified ultra-high molecular weight polyethylene powder, 2 to 8 parts of azodicarbonamide, 2 to 6 parts of methyl methacrylate-butyl acrylate copolymer, 1 to 3 parts of antioxidant 1010, 0.5 to 2.5 parts of glass beads, 0.5 to 2 parts of anatase titanium dioxide, 0.2 to 1 part of silane coupling agent KH-550 and 0.5 to 1.0 part of calcium-zinc stabilizer. 0.1 to 0.5 part of carbon black, 0.05 to 0.1 part of polyethylene wax and 0.4 to 1 part of absolute ethyl alcohol. Aiming at core pain points of laser engraved keys of a computer keyboard, through optimization of synthetic resin, the problems that characters made of common materials are polluted by hand sweat, alcohol and the like and are blurred within 1-3 months are effectively solved; and the resin is adaptive to most keyboard key basic resins such as ABS, PC and the like, and the character definition and the service life of the product are both considered.

The invention relates to the field of composite material mold pressing, in particular to a lightweight sheet and a preparation method thereof. According to the invention, an unconventional curing system azodicarbonamide and an azodiisobutyronitrile initiator are used for initiating polymerization, gas is locked through resin curing and crosslinking to form pores so as to achieve the purpose of light weight, and the gas is harmless nitrogen which accords with the idea of environmental protection; according to the invention, a traditional peroxide curing agent is abandoned, azodicarbonamide and azodiisobutyronitrile are directly utilized to produce active free radicals while being thermally decomposed to release gas, and styrene and unsaturated polyester resin are initiated to be subjected to cross-linking curing, so that gas release and curing are synchronously carried out; and the balance between gas release and resin cross-linking curing can be controlled only through the temperature.

The invention discloses a wear-resistant non-slip mat and a preparation method thereof, and relates to the technical field of non-slip mats. The wear-resistant non-slip mat is prepared from the following raw materials in parts by weight: 50 to 70 parts of natural rubber, 15 to 25 parts of butadiene styrene rubber, 10 to 20 parts of chlorinated polyethylene rubber, 8 to 15 parts of quartz sand, 8 to 12 parts of modified glass fiber, 5 to 8 parts of rapeseed oil, 2 to 3 parts of azodicarbonamide, 1 to 2 parts of sulfur, 1 to 2 parts of 2, 6-butylated hydroxytoluene, 0.5 to 1 part of modified graphite powder, 0.3 to 0.8 part of nano titanium dioxide and 2 to 4 parts of rosin resin. The wear-resistant non-slip mat has remarkable advantages. The raw materials are scientifically matched, natural rubber and other base materials guarantee basic performance, and quartz sand and other materials enhance wear resistance and skid resistance. The components are subjected to special pretreatment, such as quartz sand hydrochloric acid soaking and azodicarbonamide activation, so that the compatibility and binding force are improved. The two-stage vulcanization and other steps ensure that the product quality is stable, and the comprehensive performance is good.

The invention discloses a polyethylene microporous diaphragm as well as a preparation process and application thereof. The diaphragm is composed of an HDPE base film and a functional coating layer. The coating liquid comprises a polyurethane prepolymer, a synergistic fluorine-containing sulfonic acid polymer solution (8-12%), a boehmite nanofiller (2.5-3.5%), a trifunctional aziridine cross-linking agent (0.8-1.2%), an azodicarbonamide foaming agent (0.5-0.8%) and a dibutyltin dilaurate catalyst (0.08-0.12%) according to a specific ratio, wherein the polyurethane prepolymer is generated by reacting heteroaromatic polyester glycol (15-18%) with aromatic isocyanate (4-6%), and a solvent is DMF (Dimethyl Formamide). The diaphragm has high ionic conductivity, excellent electrolyte corrosion resistance, low thermal shrinkage rate and enhanced mechanical strength, and is particularly suitable for a lithium ion battery with high safety and long cycle life.

A method for preparing an antibacterial PBAT foamed material, including: Step A1-A3. Step A1: mixing 5,5-bis(hydroxymethyl)-2-phenyl-1,3-dioxane, sodium hydroxide, and DMF; stirring and adding 3-bromo-1-propene for reaction to obtain intermediate 1; mixing the intermediate 1 with a hydrochloric acid solution and DMF for reaction to obtain intermediate 2. Step A2: mixing the intermediate 2, 2-methacryloxyethyltrimethylammonium chloride, hexafluorobutyl methacrylate, and DMF; stirring and adding ammonium persulfate for reaction to obtain a modified monomer; mixing the modified monomer, terephthalic acid, adipic acid, 1,4-butanediol, tetrabutyl titanate, antimony trioxide, and N-methylpyrrolidone for reaction; raising temperature for reaction to obtain a modified copolymer. Step A3: melting and kneading the modified copolymer, a modified filler, and azodicarbonamide; foaming under a stabilized pressure; cooling to room temperature, soaking in a treatment solution under a stabilized temperature to obtain a resultant; taking out the resultant and drying to obtain the antibacterial PBAT foamed material.

The present invention discloses a non-sensitive initiator transducer element structure, which includes a PCB circuit board; a metal electrode is deposited on the top of the PCB circuit board; an ignition bridge film is coated on the surface of the metal electrode; the composition of the ignition bridge film includes a conductive polymer, a high-temperature foaming agent azodicarbonamide, and solid particles with a high thermal conductivity coefficient; the ignition bridge film is prepared by a conductive polymer solution, a high-temperature foaming agent azodicarbonamide, and solid particles with a high thermal conductivity coefficient. The prepared initiator transducer element structure does not contain any sensitive initiator agents, and only burns but does not explode when heated by an open flame, with high safety; and since this initiator transducer element structure belongs to a non-sensitive initiator, the costs in the production, storage, and transportation processes are low.

This invention discloses an azo silane coupling agent, its synthesis method, and applications. This azo silane coupling agent, derived from a substitution reaction between chloropropyltriethoxysilane and azodicarbonamide, improves the dispersibility of silica in natural rubber, thereby enhancing the mechanical properties and processing stability of the rubber compound. Compared to the commonly used silane coupling agent Si75 (bis-(triethoxysilylpropyl) disulfide), this product exhibits a better dispersion of silica in rubber compounds, improving the rubber compound's wear resistance and reducing its rolling resistance.