462 results about "Hyperbranched polymers" patented technology

The invention discloses an ultrahigh-barrier homogenized composite packaging film and a preparation process thereof, and belongs to the technical field of packaging materials. The ultrahigh-barrier homogenized composite packaging film comprises a base material layer, an ink layer, a barrier layer and a heat sealing layer, wherein the base material layer is a BOPP film, the ink layer is water-based ink, the barrier layer is a VMBOPP film, and the heat sealing layer is a PE composite film; the BOPP film is prepared from the following raw materials in parts by mass: 60 to 70 parts of polypropylene, 15 to 22 parts of hyperbranched polymer modified POE (Polyolefin Elastomer), 10 to 18 parts of ethylene-vinyl acetate copolymer, 0.1 to 0.5 part of nucleating agent and 0.1 to 0.4 part of antioxidant. The ultrahigh-barrier homogenized composite packaging film disclosed by the invention is simple in preparation process and stable in structural barrier property, has ultrahigh oxygen barrier property and water vapor barrier property and excellent mechanical strength, toughness and high and low temperature resistance, a heat sealing process is easy to control, and the edge sealing flatness after packaging is improved; the single polyolefin material is adopted, the raw materials are environment-friendly, the barrier property of the same structure of an aluminum foil can be obtained, and the cost is reduced.

The invention provides a modified polyimide fiber and a preparation method and application thereof, and the preparation method comprises the following steps: S1, adding a polyimide fiber into an alkali solution for reaction, cleaning a reactant with acid and alkaline alcohol, and drying to obtain an activated polyimide fiber; s2, adding the activated polyimide fiber into an alkaline alcohol solution, adding into a first silane coupling agent, carrying out modification reaction, adding modified epoxy resin, and mixing to obtain a bottom layer component; s3, adding the activated polyimide fiber into an alkaline alcohol solution, adding a second silane coupling agent and a hyperbranched polymer, and carrying out a modification reaction to obtain a surface layer component; and S4, covering the bottom layer component with the surface layer component, drying to obtain the modified polyimide fiber, and optimizing the coating to obtain the modified polyimide fiber with high mechanical property, excellent atomic oxygen resistance and ultraviolet resistance and environmental adaptability.

The invention provides a myriameter deep oil-gas wall-fixing type water-based drilling fluid as well as a preparation method and application thereof, and belongs to the technical field of drilling fluids. The myriameter deep oil gas wall-fixing type water-based drilling fluid is prepared from the following raw materials in parts by weight: 100 parts of water, 1-5 parts of a modified clay shear strength improving agent, 2-4 parts of a hydrophobic association polymer flow pattern regulator, 3-8 parts of a blocking agent, 2-5 parts of a hyperbranched polymer filtrate reducer and 1-3 parts of a cementation blocking type wall-fixing agent. The invention also provides a preparation method of the drilling fluid. The components such as the flow pattern regulator, the plugging agent, the filtrate reducer and the wall-fixing agent are mutually matched and synergistic, so that the drilling fluid can keep good rheological, filtration, plugging and inhibition performances for a long time under the conditions of 240 DEG C and saturated salt, has a strong wall-fixing effect, can effectively maintain the stability of the well wall of an oil-gas well in the depth of 10,000 meters, and has a wide application prospect. And well collapse, well leakage, blowout and other complex well drilling are prevented, and the drilling tool can be used for drilling oil and gas wells with the depth of ten thousand meters.

The invention relates to the technical field of drainage pipes, and discloses a PE drainage pipe containing a natural antibacterial agent and a manufacturing method thereof.The PE drainage pipe is manufactured by mixing polyethylene, the natural functional antibacterial agent, fiber additive components and other components and then conducting melt extrusion shaping. The natural functional antibacterial agent is polybutadiene of which the structure is grafted with natural antibacterial agent thymol, so that the toughness of the drainage pipe can be improved, and the drainage pipe can be endowed with excellent long-acting antibacterial performance; the prepared fiber added components can be intertwined and interwoven with polyethylene molecular chains in the subsequent melting process, so that the quartz fibers can effectively exert the self-reinforcing effect, the mechanical strength of the drainage pipe is improved, and the drainage pipe can adapt to more complex application environments.

The invention relates to an ultraviolet deoxidizing and fresh-keeping packaging material and application thereof, and belongs to the technical field of packaging materials. According to the invention, trimethylolpropane triacrylate and ethylenediamine are used as raw materials, a hyperbranched polymer with terminal double bonds is constructed based on Michael addition, then a sulfydryl-containing hindered amine light stabilizer obtained by ester exchange of methyl thioglycolate and pentamethylpiperidinol is added, and the hindered amine light stabilizer and alkyl mercaptan are subjected to a sulfydryl-alkene click reaction together. The light stabilizer and plastic are subjected to melt blending and then subjected to curtain coating to form a film to serve as an outer layer, and one face of the outer layer is coated with coating liquid prepared from a dispersing agent, PET, an active substance capable of generating triplet excitons under irradiation of ultraviolet light, an antioxidant, an ultraviolet light absorber and a stabilizer. When the ultraviolet deoxidization fresh-keeping packaging material is applied to packaging of articles, deoxidization can be achieved through irradiation of ultraviolet light, and the degradation effect of the ultraviolet light on the outer layer is very little.

The invention provides a preparation method of a hydrophilic antibacterial modified polylactic acid wire, which comprises the following steps: S1) plying and twisting polylactic acid filaments to obtain polylactic acid plied yarns; s2) weaving the polylactic acid plied yarn to obtain a polylactic acid wire; s3) performing low-temperature plasma treatment on the polylactic acid fiber to obtain a surface-activated polylactic acid wire; and S4) transferring the treatment solution to the surface of the surface-activated polylactic acid wire rod to obtain the hydrophilic antibacterial modified polylactic acid wire rod. Compared with the prior art, the preparation method disclosed by the invention has the advantages that a low-temperature plasma technology and a carboxyl-terminated hyperbranched polymer / polydopamine blended solution coating technology are utilized to achieve a synergistic effect, hydrophilic and antibacterial functions are simultaneously given to the modified polylactic acid wire rod, and the modification effect is ensured to have very high stability and durability; in addition, according to the method, the main component of the polylactic acid in the suture fibers is reserved, and the biocompatibility and the biological safety of the polylactic acid material are ensured.

The invention provides a method for removing residual fluorescent liquid before part welding, and relates to the technical field of part machining. The method for removing the residual fluorescent liquid before welding of the part comprises the following steps that (1) the part subjected to preliminary flushing is heated and cooled; (2) the cooled part is put into an ultrasonic cleaning machine, a cleaning agent is added for vibration treatment, and then clean water is used for washing; (3) the washed part is dried, and no fluorescent reaction exists when the part is irradiated by a black light lamp; the cleaning agent is prepared from the following components in parts by weight: 10 to 20 parts of hyperbranched polymer grafted modified activated carbon, 10 to 15 parts of modified bentonite and 3 to 7 parts of sodium gluconate. Fluorescent liquid which is not easy to remove in part holes can be thoroughly removed at a time, and repeated cleaning work can be reduced.

The invention relates to a composition for a biomimetic material and a preparation method of the composition. The composition comprises hydrophobic modified hydroxyapatite, polylactic acid and a hyperbranched star polymer with a hyperbranched polymeric structure as a core and polycaprolactone as an arm. The invention also relates to a product containing the composition for the biomimetic material. According to the application, the hyperbranched star-shaped polymer taking a hyperbranched polymerization structure as a core and polycaprolactone as an arm is creatively introduced into a PLA / HA composite system, and the hyperbranched star-shaped polymer can effectively improve the compatibility among the components and also can reduce the shrinkage rate of the composition for the biomimetic material. The composition for the biomimetic material can be processed to prepare a 3D printing wire rod with good toughness and high surface quality. According to the 3D printing wire rod, through the 3D printing technology, the manufactured bionic support is good in mechanical performance and size stability, and the printing process is smooth.

The invention discloses an antistatic protective glove and a preparation method thereof, and relates to the technical field of protective gloves. The antistatic protective glove is prepared from the following raw materials in parts by weight: 50 to 60 parts of natural latex, 40 to 50 parts of neoprene latex, 0.4 to 2 parts of potassium hydroxide, 1.2 to 1.8 parts of peregal O, 1.5 to 3 parts of sulfur, 1 to 2 parts of accelerant BZ, 3.5 to 5 parts of antistatic agent, 0.5 to 1 part of sodium carboxymethyl cellulose and 1.2 to 1.8 parts of anti-aging agent. The preparation method of the antistatic agent comprises the following steps: firstly, reacting 1, 3, 5-tri (2, 3-epoxypropoxy) benzene with N1, N7 dimethyl heptane-1, 7-diamine to obtain a hyperbranched polymer, and then carrying out quaternization on the hyperbranched polymer and chlorinated octadecane to obtain the antistatic agent. The antistatic protective glove provided by the invention has excellent antistatic performance and anti-aging performance.

The invention relates to the technical field of rubber, and relates to a wear-resistant rubber composite material and a preparation method thereof. The wear-resistant rubber composite material is prepared from the following components in parts by weight: 100 parts of a rubber matrix, 30 to 60 parts of multi-stage core-shell structure composite filler, 10 to 15 parts of carbon black, 1.0 to 2.5 parts of a vulcanizing agent, 0.5 to 2.0 parts of an accelerant, 3 to 6 parts of an active agent and 1 to 3 parts of an anti-aging agent, the multi-stage core-shell structure composite filler sequentially comprises a rigid inorganic nano-particle core, a rigid inorganic nano-particle core and a rigid inorganic nano-particle core from inside to outside, the core is coated with the first shell layer, the first shell layer is a mesoporous silica layer, and a silane coupling agent containing sulfur groups is modified in the mesoporous silica layer; and the second shell layer is coated outside the first shell layer and is a hyperbranched polymer layer. According to the wear-resistant rubber composite material provided by the invention, the comprehensive mechanical property and wear resistance of the rubber composite material are improved.

The invention relates to the technical field of non-woven fabrics, and particularly discloses a soft SMS non-woven fabric and a preparation method thereof. The soft SMS non-woven fabric comprises a spunbond layer and a melt-blown layer, and the spunbond layer comprises the following raw materials in parts by weight: 65-80 parts of spunbond PP, 5-10 parts of a PE / PP copolymer, 2-4 parts of PP-g-MAH, 4-6 parts of a dopamine grafted hyperbranched polymer and 7-11 parts of mineralized nanocellulose. The soft SMS non-woven fabric can be used in the fields of medical protection, hygienic product materials, industrial filtration and the like, and is comfortable in hand feeling and excellent in softness.

The invention discloses a PP (polypropylene) material with scratch resistance. The PP material is prepared from the following raw materials in parts by weight: 75-85 parts of a PP matrix; 3 to 8 parts of modified nano silicon dioxide; 5 to 10 parts of an ethylene-octylene copolymer (POE); 2-5 parts of an organosilicon elastomer; 1 to 4 parts of hyperbranched polymer (HBP); 1 to 3 parts of self-repairing microcapsules; 2-5 parts of nano calcium carbonate; 0.3 to 0.8 part of an antioxidant; and 0.5-2 parts of a dispersant. Through the synergistic effect of the modified nano silicon dioxide, the nano calcium carbonate and the hyperbranched polymer (HBP), the surface hardness and the scratch resistance of the PP material are improved, the compatibility of the nano silicon dioxide and the nano calcium carbonate with a PP matrix is enhanced through modification treatment of the nano silicon dioxide and the nano calcium carbonate, and the mechanical property and the wear resistance of the material are improved.

The invention provides high-grinding-efficiency color paste, a preparation method thereof and dispersed ink, and belongs to the technical field of dispersed ink, and the high-grinding-efficiency color paste comprises the following components in percentage by weight: 15%-30% of disperse dye toner, 15%-25% of a dispersing agent, 5%-15% of resin ammonium salt, 10%-20% of a dissolution promoting mixture, 0.5%-2% of a wetting agent and the balance of water; the dispersing agent comprises a hyperbranched polymer and a sodium naphthalene sulfonate improved polymer; the hyperbranched polymer takes a benzene ring as a center, hydrophobic groups and hydrophilic groups on a branched chain are randomly distributed, the hydrophilic groups of the branched chain comprise carboxylate and sulfonate, and the hydrophobic groups of the branched chain comprise alkane, ester and aryl. According to the invention, the hyperbranched polymer and the sodium naphthalene sulfonate improved polymer are mixed with the dispersing agent, so that the problem of abrupt change of ink viscosity can be avoided when the content of ink toner is relatively high, thereby obtaining the color paste with strong dispersion and high stability, and further obtaining the dispersed ink with good stability.

The invention relates to the technical field of plastic processing aids, and particularly discloses a pearlescent color master batch for PET bottle blowing and a preparation method of the pearlescent color master batch. The pearlescent color master batch for PET bottle blowing comprises the following raw materials in percentage by mass: 65-75% of PET carrier resin, 2-8% of a composite dispersant, 1-2% of a lubricant, 15-25% of an organic pigment and 6-10% of a pearlescent pigment, the composite dispersant comprises the following raw materials: macrocyclic oligoester, a hyperbranched polymer and an ionic liquid. When the pearlescent color master batch for the PET blown bottle is applied to preparation of the PET blown bottle, uniform dispersion can be achieved, the glossiness and the pearlescent effect of the PET blown bottle are remarkably improved, the uniformity and consistency of the appearance of a product are kept, and the PET blown bottle is endowed with unique metal texture.

The invention belongs to the technical field of fresh keeping of agricultural products, and particularly relates to a fresh-keeping packaging film capable of inhibiting browning and a preparation method of the fresh-keeping packaging film. The fresh-keeping packaging film sequentially comprises a first PE layer, a second PE layer, a third PA layer, a fourth PA layer and a fifth PE-EVA-POE layer from the first layer to the fifth layer from outside to inside, the first PE layer comprises the following raw materials in parts by weight: 25-40 parts of low-density polyethylene, 15-30 parts of linear low-density polyethylene, 30-60 parts of high-density polyethylene and 2-5 parts of a modified nano material; the modified nano material is prepared by mixing nano titanium dioxide, nano silicon dioxide and nano zinc oxide and then sequentially reacting with a silane coupling agent KH570 and a hyperbranched polymer. The prepared fresh-keeping packaging film has an excellent fruit browning prevention effect and is high in puncture resistance and good in low-temperature resistance effect.

The invention discloses an aging-resistant sealant for cable joints and a preparation method thereof, and belongs to the technical field of sealants, the aging-resistant sealant for cable joints comprises the following raw materials by mass: 35-50 parts of hydroxyl silicone oil, 45-60 parts of a filler, 3-5 parts of fumed silica, and 2-5 parts of a fluorine-containing hydroxyl-terminated hyperbranched polymer; 3-6 parts of hydrogen-containing silicone oil, 1-5 parts of a silane coupling agent, 1-3 parts of a ketoxime cross-linking agent, 0.05-0.1 part of an organic tin catalyst, 0.1-0.2 part of a lubricant and 1-3 parts of carbon black; the fluorine-containing hydroxyl-terminated hyperbranched polymer is prepared by taking trimethylolpropane, dimethylolbutyric acid and 2, 2-difluoro-3-hydroxy-succinic acid as monomers. The sealant disclosed by the invention has excellent comprehensive performance and aging resistance, and still has excellent performance under the conditions of high temperature, high humidity and high salt mist.

The invention discloses a dispersing agent, an electrode plate and a battery. The dispersing agent comprises a hyperbranched polymer, and the hyperbranched polymer contains a hyperbranched core, a plurality of branched repeating units and a connecting chain; wherein the branched repeating unit comprises at least one of carbonyl and ether, and the connecting chain is connected with the hyperbranched core and the branched repeating unit. The hyperbranched polymer in the dispersant can effectively anchor electrode materials of the electrode slurry through the synergistic effect of the hyperbranched core and the branched repetitive unit contained in the hyperbranched polymer, so that the dispersibility of each electrode material is improved, and the rheological property of the electrode slurry is adjusted. The connecting chain effectively enhances the stability of connection between each branched repeating unit and the hyperbranched core, so that the molecular structure of the hyperbranched polymer and the stability of the dispersion effect are improved. Any one of the electrode plate and the battery contains the dispersant provided by the invention.

The invention discloses a flame-retardant B1-grade sheath material and application thereof in cables, and relates to the technical field of high polymer materials. Comprising the following raw materials in parts by weight: 40-50 parts of an ethylene-vinyl acetate copolymer, 10-20 parts of an ethylene-vinyl alcohol copolymer, 10-20 parts of a functional hyperbranched polymer, 30-40 parts of a metal organic framework modified composite flame retardant, 3-5 parts of a compatilizer, 0.8-1.2 parts of an antioxidant and 0.4-0.6 part of a lubricant. The functional hyperbranched polymer comprises structural units introduced by the following monomers: triphenyl isocyanate thiophosphate and N-[(4-methyl-1H-benzotriazole-1-yl) methyl] diethanol amine. The material is high in tensile strength, sufficient in thermal shock resistance and excellent in aging resistance and flame retardance.

The invention provides a perovskite solar cell and a preparation method thereof. The perovskite solar cell comprises a transparent conductive substrate, a first carrier transport layer, a perovskite active layer, a second carrier transport layer and a metal electrode layer which are sequentially stacked, a functional layer is further arranged between the first carrier transport layer and the perovskite active layer, and the functional layer is made of hyperbranched polymer. The hyperbranched polymer is selected from one or more of polyamide with a hyperbranched structure, polyimide, polyether ester and polycarbonate, and the branching degree of the hyperbranched polymer is 0.5-0.8. The hyperbranched polymer of the kind is used as the material of the functional layer, so that the mechanical strength of the perovskite solar cell can be improved, the impact resistance of the perovskite solar cell can be improved, and the change of mechanical internal stress can be absorbed; and meanwhile, HI and I2 generated by decomposition of the perovskite active material can be blocked and absorbed, so that the risk of lead leakage when the perovskite solar cell is damaged is reduced.

The invention relates to the technical field of degradable hyperbranched epoxy resin-carbon fiber composite materials, and particularly discloses a high-performance degradable imide skeleton hyperbranched epoxy resin-carbon fiber composite material and a preparation method thereof. The specific preparation process is as follows: (1) firstly synthesizing an imide skeleton-terminated sulfydryl hyperbranched polymer and hyperbranched epoxy resin; (2) chemically grafting carbon fiber cloth on the surface of the sulfydryl-terminated hyperbranched polymer to obtain modified carbon fiber cloth; and (3) fully infiltrating the modified carbon fiber cloth by blending hyperbranched epoxy resin and E51, and laminating, compounding and curing to obtain the high-strength and degradable epoxy resin-carbon fiber composite material. The composite material can be completely degraded in an alkaline alcohol solution, so that the carbon fiber is recycled and reused. The process is simple, and the composite material has high performance, high degradation efficiency and a recycling function and is expected to be used for manufacturing structural parts in the fields of wind power blades, aerospace and the like.

The invention discloses a sodium ion battery conductive agent and a preparation method thereof, and belongs to the technical field of sodium ion batteries. The sodium ion battery conductive agent comprises a hyperbranched polymer and a carbon-based conductive material, the hyperbranched polymer catalyzes 2-thiophenecarbonitrile through trifluoromethanesulfonic acid to generate 2, 4, 6-tri (2-thienyl)-1, 3, 5-triazine through polymerization, then aldehyde groups are introduced to prepare thienyl triazinyl formaldehyde, and the thienyl triazinyl formaldehyde reacts with 2, 4, 6-tri (4-aminophenyl)-1, 3, 5-triazine to prepare the sodium ion battery conductive agent. A triazine structure in the hyperbranched polymer in the conductive agent prepared by the invention is cooperated with a thiophene unit, so that the conjugation effect and the electron transmission efficiency can be remarkably enhanced; the flexible and hyperbranched structure of the thiophene ring can buffer volume expansion in the charging and discharging process, and the cycle performance is prolonged; the hyperbranched polymer can be effectively cross-linked with the carbon-based conductive material to form a multi-path transmission channel, so that the charging specific capacity of the battery is improved.

The invention discloses a solid electrolyte membrane, a preparation method and a lithium battery. The solid electrolyte membrane comprises a polymer electrolyte, the structure of the polymer electrolyte is a hyperbranched polymer, a molecular chain of the polymer electrolyte contains a polyoxyethylene chain segment, ether oxygen atoms in an amorphous phase region can form coordination with lithium ions, migration of the lithium ions is facilitated, and the ionic conductivity of the solid electrolyte membrane is improved; besides, a nitrogen and sulfur element annular structure is introduced into the hyperbranched polymer, so that the mechanical strength of the solid electrolyte membrane can be effectively improved, the ionic conductivity of the solid electrolyte membrane can be further improved, the interface impedance can be reduced, and the comprehensive performance of the battery on safety performance and electrical performance is improved.

The invention relates to the technical field of water-based binders, and discloses a high-heat-resistance water-based binder and a preparation method thereof.The high-heat-resistance water-based binder is prepared from, by mass, 40-60 parts of water-based epoxy resin, 15-20 parts of a high-temperature-resistant additive, 10-15 parts of a thiol-terminated hyperbranched polymer, 1-2 parts of a film-forming agent, 0.5-1 part of a dispersing agent, 1.5-2 parts of a defoaming agent, 3-4.5 parts of a curing agent and 12-30 parts of deionized water. Kaolin in the powdery material can react with sodium silicate and phosphate, an Al-O-Si three-dimensional framework and heat-resistant aluminum phosphate can be formed in the water-based binder, and high high temperature resistance is achieved. A formed Al-O-Si three-dimensional framework and heat-resistant aluminum phosphate are coated on the surface of the graphene, so that the impact resistance of the graphene nanosheet is improved; the thiol-terminated hyperbranched polyester can enlarge the free volume of the water-borne epoxy resin, facilitates molecular chain movement of the epoxy resin and improves the toughness.

According to the dispersing agent for the positive electrode slurry, the positive electrode slurry, the positive plate and the electrochemical device, the dispersing agent comprises a solvation chain segment, the solvation chain segment is a hyperbranched polymer, and a terminal unit of the hyperbranched polymer is an electronegative group. According to the dispersing agent for the positive electrode slurry, provided by the invention, the hyperbranched polymer with an electronegative terminal group is used as a solvation chain segment, and a high-density terminal functional group is provided through a hyperbranched structure, so that the anchoring capability and the space stabilization effect on a positive electrode active material are remarkably enhanced; meanwhile, by utilizing the electrostatic repulsion effect of electronegative groups and the surface of the positive electrode material, the dispersion stability of the slurry is effectively improved, and sedimentation and agglomeration are inhibited.

The invention relates to a high-strength low-warpage 3D printing nylon modified material and a preparation method thereof, the high-strength low-warpage 3D printing nylon modified material comprises the following raw materials by weight: 64-87 parts of nylon resin, 1-2 parts of a crystallization accelerator, 1-2 parts of a maleic anhydride grafted flexibilizer, 1-2 parts of a benzene ring-containing hyperbranched polymer, 5-15 parts of modified silicon carbide whisker, 5-15 parts of modified carbon fiber, and 0.2-0.5 part of a lubrication dispersant TAF. Wherein the modified silicon carbide whisker is obtained by coating the surface of a silicon carbide whisker with a layer of conductive polymer and then performing electrochemical treatment; the modified carbon fiber is obtained by coating a layer of layered dihydroxy compound on the surface of carbon fiber and introducing a functional substance between the dihydroxy compound layers through ion exchange. According to the 3D printing nylon modified material disclosed by the invention, the modified silicon carbide whiskers and the modified carbon fibers are added, so that the tensile strength and the bending strength of the material are improved, and the deformation and warping of the material are reduced.

A hyperbranched polymer and a preparation method therefor and the use thereof. The hyperbranched polymer comprises a structural formula of formula 1, wherein R is selected from a substituted or unsubstituted C12-C18 alkyl. The hyperbranched polymer, which is used as a demulsifier for demulsifying crude oil emulsions, exhibits a high demulsification efficiency, a low usage amount, a low demulsification temperature, a high acid and alkali resistance, and a high salt resistance. The demulsifier has a high demulsification performance in oil-water emulsions with various properties.

The invention discloses an epoxy resin adhesive and a preparation method thereof, and belongs to the technical field of material preparation. The adhesive is composed of 50-100 parts of an epoxy resin main agent and 50-120 parts of a curing agent; the epoxy resin main agent is functionalized carbon nanotube modified liquid epoxy resin, and the functionalized carbon nanotube modified liquid epoxy resin is composed of 100 parts of bisphenol epoxy resin, 5-25 parts of diglycidyl ether and 5-15 parts of glycidyl methacrylate; the curing agent is prepared from 60 to 100 parts of modified polyamine curing agent, 10 to 25 parts of hyperbranched polymer modifier, 5 to 15 parts of nano silicon dioxide dispersion, 10 to 20 parts of amino-terminated liquid nitrile rubber and 3 to 10 parts of curing accelerator. According to the invention, a high-temperature curing and normal-temperature curing combined technology is adopted to realize that the epoxy resin adhesive forms strength in a short time at normal temperature and does not adhere to the wheel, and secondary curing can be carried out at high temperature, so that interlayer bonding is enhanced. The preparation process is simple, and the prepared epoxy resin adhesive is excellent in tensile property and bonding property.

The invention discloses a robot simulation skin and a preparation method of the robot simulation skin. The formula of the robot simulation skin is composed of 100 parts of an organosilicon polymer with a main chain containing double bonds, 30-45 parts of a hyperbranched phenyl silicone oil plasticizer, 5-18 parts of a nanoscale texture conditioning agent, 7-22 parts of a dynamic crosslinking system and 1.5-9 parts of a function response additive. Through cross-scale cooperation of an organosilicon polymer matrix and functional components, a conformational entropy buffer network of a hyperbranched plasticizer is constructed on a molecular level, a light-force energy flow channel decoupling mechanism of a core-shell regulator is formed on a mesoscopic level, space-time regulation and control of gradient crosslinking and photo-thermal response are realized on a macroscopic level, and meanwhile, the cross-scale cross-linked hyperbranched polymer has good application prospects. The physical essence of inherent contradictions of'high-temperature softening-low-temperature embrittlement 'and'light transmittance-elasticity mutual exclusion' of existing silica gel skin is broken through, and the sensitivity of conformation entropy change to temperature is reduced through the molecular topology confinement effect.

The invention belongs to the technical field of modified plastics, and particularly relates to a high-reflection low-transmittance polypropylene composite material as well as a preparation method and application thereof. The invention provides a novel polypropylene composite material formula, which comprises homo-polypropylene, precipitated barium sulphate, hollow glass beads, maleic anhydride grafted polypropylene and a hyperbranched polymer dispersant, through selection and synergistic effect of the specific components, the reflectivity of the obtained polypropylene composite material is significantly improved, the light transmittance is greatly reduced, and the polypropylene composite material has a good application prospect. Good mechanical properties and high-whiteness surface appearance are kept, and the high-whiteness optical fiber can be widely applied to the field of various optical products.

The invention relates to the technical field of epoxy resin preparation, and particularly discloses a modified epoxy resin packaging material and a preparation method thereof.The modified epoxy resin packaging material is prepared from, by weight, 96-130 parts of resin matrix, 14-16 parts of heat conduction filler, 9-12 parts of composite flame retardant, 4.6-5.6 parts of curing accelerator, 1.2-1.4 parts of photoinitiator and 440-500 parts of solvent; the hydroxyl-terminated hyperbranched polymer and the heat-conducting filler are added into the modified epoxy resin packaging material, and the polymer contains rich active hydroxyl, benzene rings,-Si-O-Si bonds and sulfydryl, not only can be subjected to a curing reaction with bisphenol A epoxy resin, but also can be subjected to a reaction with the heat-conducting filler, so that the heat-conducting property of the heat-conducting filler is improved; the overall crosslinking density of the modified epoxy resin packaging material is improved, the dispersity of the heat-conducting filler is improved, the heat conductivity is improved, and meanwhile the ablation resistance and the mechanical property of the modified epoxy resin packaging material are improved.