36results about How to "Good toughening effect" patented technology

The invention relates to the technical field of epoxy resin paint, and discloses waterborne epoxy paint suitable for containers and a preparation method of the waterborne epoxy paint. A component A of the waterborne epoxy paint comprises, by weight, 100 parts of waterborne epoxy resin and 0.5-0.8 part of a flash rust inhibitor; the component B comprises 6-8 parts by weight of a polyamide curing agent, 5-12 parts by weight of an organosilicon sulfonate polyurethane toughening agent and 0.2-1 part by weight of graphene oxide; the organic silicon polyurethane flexibilizer can play a role of a dispersing agent, the dispersity of graphene in the waterborne epoxy paint is improved, the main chain of the organic silicon polyurethane flexibilizer contains imino groups, the organic silicon polyurethane flexibilizer can be subjected to a curing reaction with epoxy resin, a flexible organic polysiloxane molecular chain is bonded into an epoxy resin molecular chain, and the flexibility of the waterborne epoxy paint is improved. A good toughening effect is achieved, so that the flexibility, the impact resistance and the corrosion resistance of a paint film are improved.

The invention relates to the technical field of biodegradable materials, and particularly discloses a BBM-added bamboo powder biodegradable material and application thereof in beer bottles. The BBM-added bamboo powder biodegradable material is prepared from the following raw materials in parts by mass: 10 to 20 parts of poly (butylene succinate), 10 to 30 parts of poly (butylene adipate-co-terephthalate), 10 to 20 parts of bamboo powder, 1 to 3 parts of dopamine hydrochloride, 0.1 to 0.5 part of n-butylamine, 1 to 2 parts of hexadecyl trimethyl ammonium bromide, 1 to 5 parts of tetraethyl orthosilicate and 1 to 2 parts of tetrabutyl titanate. 1-2 parts of 3-aminopropyltriethoxysilane, 1-2 parts of an antioxidant and 1-2 parts of a plasticizer. The BBM obtained by the invention has excellent mechanical properties, improves the anti-ultraviolet intensity of a degradable material to a certain extent, and has very good biodegradability.

The invention relates to the technical field of organic silicon toughening agents, in particular to a long-chain alkyl modified organic silicon toughening agent and a preparation method thereof.The long-chain alkyl modified organic silicon toughening agent is prepared through sulfydryl double-bond reaction of vinyl silicone oil and long-chain alkyl mercaptan, organic silicon hydrolysis is conducted under a certain temperature condition to synthesize silicon emulsion, long-chain alkyl is preliminarily obtained, and the long-chain alkyl modified organic silicon toughening agent is prepared. Then dropwise adding a first mixed emulsion obtained by mixing an acrylate soft monomer, octadecyl methacrylate, a functional monomer, an emulsifier and an initiator, dropwise adding a second mixed emulsion obtained by mixing an acrylate hard monomer, a functional monomer, an emulsifier and an initiator, and carrying out emulsion copolymerization reaction to obtain a long-chain alkyl group again to form an interpenetrating network system; compared with the prior art, the weather resistance and temperature stability of a polymer are improved, the molecular weight of the polymer is greatly improved, the polymer has good toughness, the toughening effect on a plastic material, especially the low-temperature toughening effect, is greatly improved, and the dosage of a toughening agent in an alloy material can be reduced.

The invention relates to the technical field of polypropylene, and discloses a high-strength impact-resistant modified polypropylene plastic and application thereof in durable toys, the high-strength impact-resistant modified polypropylene plastic comprises 100 parts by weight of polypropylene, 10-30 parts by weight of hyperbranched polyurethane elastomer, 2-8 parts by weight of a filler, and 0.3-0.5 part by weight of an antioxidant; the hyperbranched polyurethane elastomer contains an alkyl long chain with good compatibility with polypropylene, and meanwhile, in the high-temperature melt extrusion process, the alkyl long chain and a polypropylene molecular chain form a physical chain winding effect, so that the compatibility between the polyurethane elastomer and the polypropylene is remarkably improved, and the interfacial force between the polyurethane elastomer and the polypropylene is improved; the hyperbranched polyurethane elastomer has a better toughening effect, and the tensile property, the bending strength and the impact strength are obviously improved.

The invention relates to the technical field of rubber materials, in particular to a preparation method and application of a fiber-doped rubber material. The preparation method comprises the following steps: plastifying a polyurethane composite material at 100-120 DEG C for 3-5 minutes, adding nitrile rubber, and plastifying for 3-5 minutes to obtain plastified rubber; adding carbon black, a plasticizer, sulfur, an accelerant, metal fibers, zinc oxide and an anti-aging agent into the plasticated rubber, and mixing to obtain mixed rubber; calendaring and molding the rubber compound to obtain the rubber material. The rubber material prepared by the invention not only has excellent mechanical properties and wear resistance, but also has excellent aging resistance, and can be applied to a preparation process of a composite silencing plate, so that the silencing and damping performance of the composite silencing plate is improved.

The invention discloses hydrogel wound application and a preparation method thereof, and relates to the technical field of wound application. The formula of the hydrogel wound application is adjusted, so that the hydrogel wound application can be prepared at normal temperature, redundant containers are not needed, and meanwhile, the hydrophilic alginate fibers are added, so that the toughness of gel is improved, and the phenomena of breakage, fracture and lacking of gel caused by insufficient strength of the gel are reduced.

The invention discloses a reaction bonding silicon carbide ceramic membrane and a preparation method thereof, and belongs to the technical field of porous ceramics. The preparation method of the reaction binding silicon carbide ceramic membrane comprises the following steps: uniformly mixing first silicon carbide powder, first silicon powder and first titanium-silicon-iron alloy powder, adding an organic binding agent and a polyol plasticizer, and granulating and forming to prepare a support body green body; uniformly mixing second silicon carbide powder, second silicon powder, second titanium-silicon-iron alloy powder, a water-based polymer dispersant and water to obtain slurry, and coating the surface of the support body green body with the slurry to obtain a support body green body containing a film layer; and sintering the support body green body containing the membrane layer at 1200-1400 DEG C in a nitrogen-containing gas atmosphere to obtain the reaction bonding silicon carbide ceramic membrane. The reaction combined silicon carbide ceramic membrane prepared by the method has excellent thermal shock resistance.

The invention relates to self-excitation geopolymer concrete and a preparation method thereof, and belongs to the technical field of inorganic cementing materials, the self-excitation geopolymer concrete is composed of a powder material and a liquid material; the powder material is composed of Portland cement, fly ash, blast furnace slag, graded aggregate, modified calcium carbonate whiskers, sepiolite-loaded aluminum hydroxide, calcium tetraborate powder and polycarboxylate superplasticizer powder, and the liquid material is composed of sodium hydroxide, a tetrabutyl phosphorus hydroxide aqueous solution, a sodium water glass solution and water; according to the self-excited geopolymer concrete prepared by the invention, the 28-day compressive strength is 83.4 to 86.6 MPa, the 28-day breaking strength is 11.5 to 13.2 MPa, the 28-day dry shrinkage rate is 0.02 to 0.05 percent, the 28-day tensile bonding strength is 5.1 to 6.2 MPa, the 100-time circulating compressive strength loss rate in the aspect of freeze-thaw resistance is 0.4 to 0.8 percent, and the 100-time circulating tensile bonding strength loss rate is 0.3 to 0.6 percent.

The invention discloses a hub powder coating capable of resisting powder collapse during finish turning as well as a preparation method and application of the hub powder coating. The hub powder coating is prepared from the following raw materials: modified polyester resin, epoxy resin, filler, a crosslinking accelerator, a flexibilizer and an adhesion promoter. According to the powder coating disclosed by the invention, modified polyester resin and epoxy resin are mainly adopted to react, a carboxyl-terminated group in the polyester resin and an epoxy group in the epoxy resin are subjected to a cross-linking curing reaction to prepare a coating, and meanwhile, a flexible small molecular chain segment is successfully grafted on a polyester branch chain, so that the glass transition temperature of the resin and the subsequently prepared powder coating is reduced; the toughness and the secondary recoating adhesive force of the coating are effectively improved. The powder coating can be used for automobile hubs, an obtained coating has good toughness, leveling property and corrosion resistance, the problem of powder collapse during finish turning can be avoided, meanwhile, a large curing window is achieved, and the requirements of customers for different furnace temperatures can be met within a certain temperature range.

This invention discloses a strongly bonded surface glaze layer for stain-resistant ceramic tiles, its preparation method, and its application, relating to the field of ceramic tile manufacturing technology. The surface glaze layer comprises a microcrystalline glaze composite layer and a stain-resistant surface layer. The microcrystalline glaze composite layer contains a core-shell structured aluminum zirconium phosphate, and the stain-resistant surface layer contains a core-shell structured calcium-activated silica gel. The two layers are sintered to form Ca-Zr-P-O chemical bonds. This achieves strong interfacial bonding and, through the construction of a dense nanocomposite structure for synergistic stain resistance, results in excellent and long-lasting stain-resistant performance, significantly improving the stain resistance and service life of the ceramic tile. It solves the problem of stain-resistant layers easily detaching and failing during long-term use in existing ceramic tile technologies.

The invention discloses a PE mesh steel belt spiral winding pipe and a preparation method thereof, and belongs to the technical field of winding pipes, the PE mesh steel belt spiral winding pipe comprises the following raw materials by weight: 91 parts of a polyethylene pipeline material, 5 parts of a polyethylene octylene copolymer, 10-15 parts of a functional component, 1 part of an antioxidant, and 0.5 part of a lubricant; the mesh steel belt is adopted to replace a traditional non-porous steel belt, on one hand, raw materials are saved, the production cost is reduced, on the other hand, the contact area of the steel belt and the polyethylene composite material is increased, the bonding strength of the steel belt and the polyethylene composite material is improved, and it is guaranteed that the PE mesh steel belt spiral winding pipe has the good mechanical property; the mechanical property, the aging resistance and the flame retardant property of the PE mesh steel belt spiral winding pipe are favorably improved.

The application provides a polymethyl methacrylate product and a preparation method thereof. The preparation method of the polymethyl methacrylate product comprises the following steps: S1. mixing a resin matrix, a toughening agent, an antioxidant and a light stabilizer to obtain a mixture; the resin matrix comprises a polymethyl methacrylate resin; the toughening agent comprises a core-shell structure toughening agent and a polyester-based toughening agent; the core-shell structure toughening agent comprises a core and a shell layer; the core comprises polybutyl acrylate, and the shell layer comprises polymethyl methacrylate; S2. melt blending, extruding and granulating the mixture, and drying, injection molding, cooling and annealing. In the application, the core-shell structure toughening agent and the polyester-based toughening agent can synergistically improve the toughening effect.

The invention relates to the technical field of polycarbonate, and discloses a preparation method of a wear-resistant material for a rear cover of a mobile phone, and the wear-resistant material for the rear cover of the mobile phone is obtained by melt extrusion and granulation of 100 parts by weight of polycarbonate, 3-15 parts by weight of polysiloxane-polycarbonate copolymer and 10-20 parts by weight of polysiloxane modified glass fiber. The polysiloxane-polycarbonate disclosed by the invention contains a flexible polysiloxane molecular chain and a unique hyperbranched structure, has a very good toughening effect on polycarbonate, can play a role in compatibilizing polysiloxane modified glass fibers and polycarbonate, improves the tensile property and bending property of the polycarbonate material under the synergistic effect, and has a good application prospect. And moreover, the mass loss rate is reduced, and the wear resistance is improved.

This invention provides a three-dimensional network nanowire soft interface on the surface of alumina fibers and its preparation method, belonging to the technical field of alumina fiber-reinforced ceramic composite materials. In this invention, alumina fibers are pretreated, fixed with a clamp, and placed in a chemical vapor deposition (CVD) furnace. The furnace is evacuated and heated. After heating, the temperature is maintained while trichloromethylsilane, hydrogen, and argon are introduced for CVD. After deposition, the mixture is cooled to room temperature to obtain alumina fibers with a three-dimensional network nanowire soft interface. The presence of nanowires significantly increases the interfacial surface area between the fiber and the matrix. When an external load is applied to an oxide ceramic matrix composite material prepared from this fiber, the shear stress on the nanowire surface, widely distributed at the fiber-matrix interface, can increase the energy dissipated during composite material failure, thereby further improving the toughening effect.

The invention belongs to the field of plastics. The invention relates to a material for an all-plastic nose bridge strip of a mask and a preparation method of the material. The material for the all-plastic nose bridge strip of the mask is prepared from the following raw materials in parts by weight: 60 to 70 parts of HDPE (High-Density Polyethylene), 10 to 20 parts of LLDPE (Linear Low Density Polyethylene), 4.0 to 8.0 parts of silicon rubber, 5.0 to 10.0 parts of filler, 1.0 to 1.5 parts of compatibilizer, 0.3 to 0.6 part of silane coupling agent, 0.3 to 1.0 part of antioxidant, 0.1 to 0.5 part of lubricant and 0.5 to 1.0 part of antistatic agent. The components are respectively subjected to processes of filler pretreatment, mixing, extrusion and granulation, and a specific side charging process is utilized to prepare the composite material. The novel material for the full-plastic nose bridge strip of the mask effectively solves the problems that the material for the full-plastic nose bridge strip of the mask in the prior art is poor in shaping property and poor in bending frequency.

The invention belongs to the technical field of high-molecular compound preparation, and discloses a reinforced fireproof flame-retardant sponge and a preparation method thereof.The sponge comprises a flame-retardant sponge body, a filling fiber body and filling gel; the flame-retardant sponge body is prepared from the following components in parts by mass: 10 to 20 parts of foaming black material, 30 to 80 parts of foaming white material, 5 to 10 parts of graphene oxide dispersion liquid and 30 to 50 parts of linen fiber; the filling fiber body is prepared from the following components in parts by mass: 20 to 30 parts of polyether-ether-ketone, 50 to 80 parts of poly (p-phenylene terephthamide) and 5 to 15 parts of antimony trioxide; the filling gel is prepared from the following components in parts by mass: 10 to 30 parts of graphene and 60 to 100 parts of silica sol solution. The flame-retardant composite material has an excellent flame-retardant effect, and the addition of the flame-retardant fiber gel complex has obvious toughening and reinforcing effects.

The invention discloses a halogen-free flame-retardant polyethylene core layer material for a decoration fireproof aluminum-plastic panel, and belongs to the technical field of building fireproof materials. The halogen-free flame-retardant polyethylene core layer material for the decoration fireproof aluminum-plastic panel is prepared from low-density polyethylene, high-density polyethylene, an ethylene-ethyl acrylate copolymer, modified sepiolite-loaded phytic acid, ethylene-octene copolymer coated expanded graphite, a modified hydroxide flame retardant, a modified nano hydrotalcite flame retardant and a lubricant polyethylene wax. According to the halogen-free flame-retardant polyethylene core layer material for the decoration fireproof aluminum-plastic panel, the tensile strength is 24.5 to 25.2 MPa, the elongation at break is 41.6 to 47.5 percent, the impact strength is 47.1 to 48.5 kJ / m < 2 >, the bending strength is 25.9 to 27.2 MPa, and the oxygen index is 40.4 to 41.1.

The invention relates to the technical field of nylon, and in particular to a core-shell structure modified nylon plastic and a preparation method thereof. The core-shell structure modified nylon plastic comprises the following raw materials in parts by weight: 100-150 parts of nylon, 20-40 parts of silicon copolymer polycarbonate, 5-9 parts of dimethyl silicone oil, 10-15 parts of a core-shell structure modifier, 0.5-1 parts of a vulcanizer and 0.5-1.5 parts of a dispersant; wherein the core-shell structure modifier is a core-shell structure with olefinic silica microspheres as cores and single-end hydrogen-containing silicone oil as shells, and the olefinic silica microspheres are obtained by grafting vinyl tris(β-methoxyethoxy) silane onto silica microspheres. The core-shell structure modified nylon plastic of the invention can be used for manufacturing high-performance engineering plastics, such as automotive parts, electronic devices and the like, and has broad market application prospects.

The application discloses a preparation method of high-strength and high-toughness polypropylene composite material, and 20-30 parts of toughening resin, 5-10 parts of crosslinking agent, 3-5 parts of dicumyl peroxide and 100-120 parts of polypropylene 20000 are weighed, and then are added into a single-screw extruder to be extruded and granulated under the conditions that the rotating speed is 95-105 rpm and the temperature is 190-200 DEG C, so that the high-strength and high-toughness polypropylene composite material is prepared. The crosslinking agent and the polypropylene form a net structure which is crosslinked with each other by free radical reaction initiated by the dicumyl peroxide in the mixing process. When the high-strength and high-toughness polypropylene composite material is subjected to external force, the toughening resin and the crosslinking agent become stress concentration points, and deformation occurs under the actions of stretching, compression and the like, a large number of crazes and shear bands are generated to consume energy, so that the toughening effect is improved.

The invention relates to novel cement prepared by recycling waste residues and a preparation method thereof, and relates to the technical field of waste residue recycling, the novel cement comprises the following components by mass: 30-50 parts of composite modified waste residues, 3-5 parts of modified polyvinyl alcohol fiber, 30-50 parts of cement clinker, and 0.5-1.5 parts of a water reducer; the composite modified waste residue is prepared from the following raw materials: composite waste residue, an ion-doped mineralizer and a composite excitant. The preparation method comprises the following steps: mixing the composite modified waste residue and the water reducing agent, stirring, adding the cement clinker, carrying out dry mixing, adding the modified polyvinyl alcohol fiber, and stirring to obtain the novel cement prepared by recovering the waste residue. The cement has the effect of improving the early strength performance of the novel cement prepared by recycling the waste residues, and the cement has good compressive strength and stability.

The invention relates to the technical field of polymer chemical industry, in particular to a preparation method of a rubber graft polymer. The preparation method comprises the following steps: (1) carrying out first reaction on rubber emulsion, a monomer 1, a chain transfer agent 1, an activating agent, an emulsifying agent 1 and an initiator 1 to obtain a first product containing a polymer from the monomer 1; (2) carrying out second reaction on the first product, a monomer 2, a chain transfer agent 2 and an initiator 2 to obtain a second product; and (3) adding an initiator 3 into the second product, and carrying out a third reaction to obtain the rubber graft polymer, wherein the solubility parameter of the monomer 1 is different from that of rubber contained in the rubber emulsion; the solubility parameter of the monomer 2 is different from that of the polymer derived from the monomer 1. According to the technical scheme, grafting and secondary crosslinking in rubber particles in the preparation process are reduced, meanwhile, the grafting density of the outer sides of the rubber particles is not affected, and the toughening performance of the rubber graft polymer can be remarkably improved.

The invention discloses a preparation method of a microwave-induced cold spraying carbon nano network reinforced composite coating. According to the technical scheme, the preparation method is characterized by comprising the steps that S1, powder is prepared; coating the surface of the metal powder with a carbon nanomaterial to obtain composite powder with a carbon-coated structure; s2, base material treatment; the base material is treated through abrasive paper polishing and ultrasonic cleaning, and a cleaned surface is obtained; s3, spraying treatment is conducted; depositing the carbon-coated composite powder on the surface of a base material through supersonic speed cold spraying to obtain a carbon network skeleton structure coating; compared with the prior art, the preparation method has the technical effects that the carbon layer is rapidly heated after absorbing microwave energy, and the metal matrix wrapped in the carbon layer absorbs heat and generates local melting and recrystallization through the skeleton structure, so that the toughness of the composite material coating is remarkably enhanced on the premise of not damaging the original characteristics of the base material. And after heating is completed, the composite coating is naturally cooled to the room temperature along with the furnace, the composite coating with the excellent performance is obtained, and efficient preparation can be achieved on the basis that the original characteristics of the base material are not changed through the technology.

The invention discloses a high-elasticity PVC film and a preparation method thereof, and relates to the technical field of PVC films. The invention relates to a high-elasticity PVC (polyvinyl chloride) film, which comprises PVC resin powder, a calcium-zinc stabilizer, a bio-based branched plasticizer, POE (polyolefin elastomer) coated calcium carbonate, CPE (chlorinated polyethylene) and other processing aids, the epoxidized soybean oil-based polyol is specifically prepared from epoxidized soybean oil and methanol through a ring-opening reaction. Through the technical scheme of the invention, the PVC film which not only has excellent flexibility and high elasticity, but also has good mechanical strength and tear resistance can be prepared.

The application relates to the technical field of plastic packaging film, and particularly discloses a recyclable PE wrapping film and a preparation method thereof. The recyclable PE wrapping film comprises the following raw materials: PE recyclable material, ethylene-propylene-diene rubber, active phenolic resin, metal halide, metallocene POE, HDPE resin, tackifying masterbatch, and the balance of LLDPE resin; the preparation method is as follows: the LLDPE resin is mixed with the PE recyclable material and the ethylene-propylene-diene rubber, hot melting, the active phenolic resin and the metal halide are added from the side feeding, hot melting, and a melt is prepared; the melt is cast and cooled to prepare a cast sheet, the cast sheet is drawn and stretched, and then subjected to corona treatment, curling and slitting. The recyclable PE wrapping film does not add opening agents, slip agents and anti-fog agents, ensures that the product is easy to recycle, the recyclable material has high purity, a high content of PE recyclable material is added, and the recyclable PE wrapping film still has relatively high tensile strength, puncture resistance and transparency.

The present application relates to the field of preparation of bio-based multi-level pore carbon material and environmental governance, in particular to a kind of bio-based three-dimensional multi-level pore carbon material and its preparation method and application.The preparation method of bio-based three-dimensional multi-level pore carbon material of the present application includes the following steps: biomass raw material and phenol, composite acid catalyst are mixed and reacted 1, to obtain bio-based liquefied material;Bio-based liquefied material is mixed with composite base catalyst and polyformaldehyde, and then reacted 2, to obtain bio-based liquefied resin;Bio-based liquefied resin is mixed with surfactant, foaming agent, metal-based DES and curing agent, and then foamed, to obtain carbonization precursor;The carbonization precursor is subjected to carbonization treatment, and then ultrasonic water washing is carried out, to obtain bio-based three-dimensional multi-level pore carbon material.The bio-based three-dimensional multi-level pore carbon material prepared by the method of the present application has uniform structure, contains micron-nanometer multi-level pore structure, and has high adsorption performance.

The invention belongs to the field of plastics. The invention relates to a PP material for a turnover box and a preparation method of the PP material. The PP material for the turnover box comprises the following raw materials in parts by weight: 50-75 parts of PP; 5 to 25 parts of PE; 4.0 to 6.0 parts of a toughening agent; 1.0 to 2.0 parts of a macromolecular compatibilizer; 2.0 to 4.0 parts of a functional modifier; 15-30 parts of pigment and filler; 0.3 to 1.0 part of an antioxidant; 0.2 to 0.6 part of a light stabilizer; 0.2 to 0.5 part of a lubricant; the components are respectively subjected to processes of filler pretreatment, mixing, extrusion and granulation, and a specific side charging process is utilized to prepare the composite material. The novel PP material for the turnover box effectively solves the problems of poor impact resistance, aging resistance and wear resistance of the PP material for the turnover box in the prior art.

The invention discloses a polyethylene short fiber reinforced concrete outdoor hollow decorative plate and a preparation method thereof, and relates to the field of fabricated buildings. According to the decorative plate, Portland cement is used as a base material and matched with raw materials such as polymer-coated pre-water-absorbing ceramsite and polyethylene short fibers; during preparation, the acrylate polymer emulsion modified ceramsite is prepared through a core-shell step-by-step pre-emulsification technology, then the polyethylene short fibers are added into a concrete system in batches to be evenly stirred, and the polyethylene short fiber reinforced concrete outdoor hollow decorative plate is prepared through cast-in-place forming and curing. The problems that a traditional outer wall decorating plate is prone to cracking, large in dead weight, poor in heat preservation and insufficient in durability are solved, the compression resistance, crack resistance and bending strength of the decorating plate are improved, the water absorption rate is reduced, the light weight and heat preservation and heat insulation effects are considered, and the requirement for green building development is met.

The present invention discloses a logistics packaging box based on functional plastics and a manufacturing process thereof, and relates to the technical field of functional plastics. The manufacturing process of the logistics packaging box based on functional plastics of the present invention comprises the following steps: putting the functional plastic into an injection molding machine for injection molding to obtain a logistics packaging box; the preparation method of the functional plastic comprises the following steps: blending polypropylene, an additive, white carbon black, a plasticizer, a light stabilizer, and a lubricant to obtain a mixture; putting the mixture into a twin-screw extruder for extrusion and granulation to obtain a functional plastic; the additive prepared in the present application is added to the functional plastic to effectively improve the low-temperature toughness of the material.

The present invention relates to a photosensitive dry film material, and belongs to the technical field of photosensitive dry film. A photosensitive dry film material comprises the following components: acrylate, photosensitive monomer, modified silicon dioxide, plasticizer and photoinitiator. The preparation method of the modified silicon dioxide comprises the following steps: after nano silicon dioxide is placed in anhydrous ethanol and stirred and mixed, a silane coupling agent is added and mixed, and then heated and stirred, after filtering and removing the filtrate, alcohol washing is performed, and vacuum drying is performed to constant weight to obtain a preform; after adding anhydrous ethanol, styrene, glycidyl methacrylate, n-butyl phosphate and photoinitiator to the preform, stirring and mixing under ultraviolet irradiation, filtering and removing the filtrate, alcohol washing is performed, and vacuum drying is performed to constant weight to obtain. After the photosensitive dry film material prepared by the present invention is formed into a film, it has excellent tensile strength, elongation at break and hardness.

The application discloses a kind of polypropylene resin with excellent low-temperature toughness and a preparation method thereof.The toughness loss of the polypropylene resin at-20 DEG C compared with that at 20 DEG C is less than 10%, and the toughness loss at-30 DEG C compared with that at 20 DEG C is less than 20%.In the process of preparing the polypropylene resin, at least a step of ethylene-propylene copolymerization by periodically changing the concentration ratio of ethylene monomer and propylene monomer in the reaction environment is included.The polypropylene resin obtained by the application has excellent impact performance and can maintain high toughness in low-temperature use environment, and has potential as a thermoplastic elastomer.