15results about How to "Reduce phase separation" patented technology

The invention discloses a high-thermal-conductivity polymer shaped composite phase change material and a preparation method thereof. The high-thermal-conductivity polymer shaped composite phase change material comprises macromolecular resin, a processing aid, a thermal conductive filler, an organic phase change material, a modifier, an initiator, an emulsifier, a dispersant and a catalyst. According to the invention, expanded graphite is used as a heat-conducting reinforcing agent, high-density polyethylene is used as a carrier, paraffin is used as a phase-change material, a melt blending method, an in-situ polymerization method and a hot press molding process are adopted to prepare a microencapsulated HDPE shaped paraffin composite material, the HDPE shaped paraffin composite material is completely encapsulated in a polymer film, so that the core material is completely coated, and the heat-conducting property of the core material is improved. According to the present invention, the microcapsule is prepared by using a chemical bond, and is tightly combined with the surface of the core material through the chemical bond so as to improve the stability and the durability of the microcapsule, such that the microcapsule can prevent leakage and improve the thermal conductivity, such that the microcapsule can maintain the stable performance in the multiple phase change cycles, and the microcapsule has good fluidity and good dispersion so as to be conveniently processed and applied in various base materials.

The invention provides a preparation method of a flexible hydrogen delivery pipe, and relates to the field of flexible hydrogen delivery pipe manufacturing, and the flexible hydrogen delivery pipe comprises the following raw material components: polytrifluorochloroethylene, nylon 11, polyvinylidene fluoride, a micro-nano carbon material, polyethyleneimine, a compatilizer, a cross-linking agent, an antioxidant, a dispersing agent and a light stabilizer, the cross-linking agent is a thermoplastic polyurethane copolymer, the micro-nano carbon material comprises graphene oxide and graphene nanoplatelets, the dispersing agent is one of EBS, EB-G and PE wax, the antioxidant is antioxidant 1076, and the light stabilizer is one of benzophenone and 2-hydroxybenzoate; the gas barrier material has the advantages of being good in gas barrier property and high in mechanical property on the whole.

The invention relates to a preparation method of a toughened polylactic acid composite material based on an interfacial compatibilization effect, which is characterized in that an in-situ compatibilizer is prepared through molecular structure design based on chemical interaction between an active functional group of a grafting agent and a double bond on an ethylene propylene rubber molecular chain; the in-situ compatibilizer is used for improving the binding power between the polylactic acid and the ethylene propylene diene monomer, so that the two-phase interface compatibility is improved; a unique stereocomplex crystal structure of polylactic acid is further introduced into the system, and the two-phase dispersion state is improved by virtue of regulation and control and crystallization induction effects of stereomicrocrystals on a two-phase interface, so that the toughened polylactic acid composite material is prepared; by optimizing the content of an in-situ compatibilizer and a stereocrystal, a processing technology and other methods, formation of composite materials with different phase morphologies is induced, different modification and toughening effects are achieved, and the high-toughness polylactic acid composite material is prepared.

This invention relates to the field of polymer material synthesis technology, specifically to a modified PVB resin and its preparation method. The invention introduces a fluorinated acetal monoaldehyde derivative containing fluorine into the PVB resin. This derivative is mixed with n-butyraldehyde and glyoxal, thereby undergoing an acetalization reaction with the 1,3-o-diol structure of the PVB molecular chain, incorporating the fluorinated side link into the PVB molecular chain. Utilizing the high electronegativity and high C-F bond energy of fluorine atoms, it shields against the intrusion of external corrosive media, inhibits oxidative yellowing, and improves weather resistance. Furthermore, the invention introduces glyoxal as a crosslinking agent, containing dialdehyde groups, which can react between adjacent polyvinyl alcohol segments, causing slight crosslinking between the originally linear PVB resin segments, improving the resin's shielding performance, further reducing the intrusion of external corrosive media, and enhancing the stability of the PVB resin.

The invention relates to transparent light-heat curing acrylate modified epoxy resin and a preparation method and application thereof, and the transparent light-heat curing acrylate modified epoxy resin comprises the following components: aliphatic polyurethane acrylate oligomer, acrylate monomer, styrene-maleic anhydride copolymer, adhesion promoter, amino resin, photoinitiator, hydrogenated epoxy resin A and hydrogenated epoxy resin B, the composition is prepared from a thixotropic agent, an anti-aging agent, a UV absorbent, a light stabilizer, a curing agent and an accelerant. The problems that the requirement for glass fibers is high, holes are prone to occurring inside and the like due to insufficient infiltration of pure acrylic ester are solved, and the light photovoltaic flexible assembly prepared from the epoxy resin is excellent in performance and has good market application prospects.

The present application relates to the field of film processing technology, and specifically discloses a high-strength film and a preparation method thereof. A high-strength film, the raw materials of the film include: functionalized graphene oxide nanosheets; silicate nanofibers; polycarbonate polyols; silane coupling agents; isocyanate crosslinking agents; chain extenders; antioxidants and lubricants; the functionalized graphene oxide nanosheets are obtained by grafting bromine atoms on the surface of graphene oxide. The high-strength film of the present application can be used in special occasions such as aerospace, high-speed train windows, and high-end smartphone screens that need to withstand large external forces or require high durability, and it has the advantages of high strength and high durability.

The present application relates to bituminous material preparation technical field, specifically disclose a kind of acrylic resin copolymer modified emulsified asphalt and preparation method thereof, the acrylic resin composite emulsion provided by the present application can form stable reinforcing network in asphalt matrix after blending with emulsified asphalt, wherein, rigid component helps to improve the high-temperature deformation resistance and mechanical strength of material, flexible segment is endowed with good low-temperature toughness, modified lignin as interface compatibilizer and reinforcing point, further optimize the interface combination and overall stability of polymer phase and asphalt phase, so as to improve the high and low temperature resistance and mechanical properties of emulsified asphalt.

The present invention relates to a high-strength wear-resistant polyethylene gas pipeline and a preparation method thereof, belonging to the technical field of polymer materials. The present invention adopts high-density polyethylene, modified EPDM rubber, modified chlorinated polyethylene rubber, modified basalt fiber, silicon carbide ceramic material, magnesium oxide, lubricant, hindered amine light stabilizer, hindered phenol antioxidant, antistatic agent and the like as raw materials for compounding; and according to the material properties and dispersion characteristics of each component, the process steps and parameters such as mixing, mixing and extrusion are designed, which can well realize the production of pipelines and obtain gas pipelines with uniform quality and excellent performance. The compressive strength, impact resistance and wear resistance of the pipeline are greatly improved, and the weather resistance of the pipeline is effectively improved, and the use performance and service life of the pipeline are comprehensively improved, which is more suitable for use in various harsh environments, can meet the needs of long-distance construction, long-term friction and high-pressure environment use, and can be widely used in high, medium and low pressure gas transportation, civil and industrial gas transportation.

The invention provides a light-heat dual response intelligent long afterglow coating which is prepared from the following components in parts by mass: 15 to 25 parts of coated strontium europium dysprosium aluminate, 10 to 20 parts of thermochromic microcapsules, 5 to 15 parts of tungsten-copper heterojunction filler, 30 to 40 parts of organic silicon modified acrylic resin, 3 to 8 parts of interface bridging agent and 2 to 5 parts of modified boron nitride. According to the invention, stable long afterglow performance is ensured, organic unification of photo-thermal response and long-acting luminescence is successfully realized, and the technical problems of mutual interference of components and poor environmental stability in a traditional multifunctional coating are effectively solved.

This application relates to the field of ABS material processing technology, and more specifically, to an ABS cold-resistant material and its preparation method, which is prepared from the following raw materials in parts by weight: 50-60 parts of ABS resin, 10-30 parts of SNA resin, 20-35 parts of high-rubber powder, 4-6 parts of trans-polyoctene rubber, 2.5-4 parts of hyperbranched polyesteramide, 2.5-5 parts of hydroxyl-terminated polybutadiene-acrylonitrile copolymer, 1.5-3 parts of reaction compatibilizer, 4-6 parts of poly(p-phenylene terephthalamide) short fiber, 3-5 parts of nanofiller, 1-2 parts of nucleating agent, and 0.1-2 parts of additives. The reaction compatibilizer is composed of maleic anhydride-grafted ABS and glycidyl methacrylate-grafted styrene-acrylonitrile copolymer. The ABS cold-resistant material prepared by this formula can maintain excellent impact toughness at -40℃, while having good tensile strength, flexural strength and surface hardness, and good wear resistance and scratch resistance, meeting the comprehensive performance requirements of harsh application scenarios such as automotive structural components and low-temperature logistics equipment.

The invention discloses a novel phase change energy lattice and a preparation method thereof, and belongs to the technical field of phase change energy storage materials. The energy lattice product is composed of a shape-stabilized phase change system with thermal energy storage performance and an encapsulation bag. The preparation method comprises the following steps: realizing shaping adsorption of the phase change base material and the auxiliary agent by utilizing the supporting framework material, and meanwhile, carrying out secondary packaging by virtue of an aluminum foil bag, so that the problem of liquid leakage in a long-term recycling process is solved. The synthetic process is simple, application is convenient, and the material has no obvious liquid leakage phenomenon in the working period, and is high in phase change enthalpy value and low in price, so that the material has wide application prospects.

The application provides a synergistic composite toughening PP-R pipe material and a preparation method and application thereof, and belongs to the technical field of PP pipes. The synergistic composite toughening modified PP-R pipe material provided by the application can improve the toughness of the material at room temperature and low temperature by adding an elastomer toughening agent. The addition of PP-B and PE can limit the excessive reduction of tensile strength and yield strength caused by the addition of the elastomer, so as to maintain the balance between toughness and rigidity. The addition of a compatibilizer can improve the interface bonding problem of the blend, especially the dispersion effect of the elastomer toughening agent and PE, and reduce the phase separation between PP and the elastomer and PE. The application forms a PP-R / elastomer / PE / PP-B multi-component synergistic composite toughening system through various components, realizes the complementation and synergistic improvement of the performance of the materials, and thus improves the performance of the PP-R pipe.

The invention relates to a polypropylene hot melt adhesive as well as a preparation method and application thereof, and belongs to the technical field of hot melt adhesives. The polypropylene hot melt adhesive is prepared from the following components in parts by weight: 100 parts of maleic anhydride modified polypropylene resin, 10 to 20 parts of styrene-maleic anhydride copolymer resin, 20 to 40 parts of flame-retardant filler, 2 to 5 parts of curing agent and 150 to 200 parts of solvent, the molecular weight Mw of the maleic anhydride modified polypropylene resin is 50000-70000, the acid value is 15 mgKOH / g-25 mgKOH / g, the content of maleic anhydride is 1 wt%-2 wt%, and the melting point is 70 DEG C-100 DEG C. The invention further discloses a preparation method of the maleic anhydride modified polypropylene resin. According to the polypropylene hot melt adhesive disclosed by the invention, by compounding the styrene-maleic anhydride copolymer resin, maleic anhydride functional groups in the styrene-maleic anhydride copolymer resin can react with maleic anhydride in maleic anhydride modified polypropylene resin or form hydrogen bonds, so that the compatibility of the styrene-maleic anhydride copolymer resin and the maleic anhydride modified polypropylene resin is enhanced, and phase separation is reduced; and a more uniform composite material is formed. Meanwhile, the copolymer resin is used as an elastomer, so that the toughness of polypropylene can be improved to a certain extent, and the impact resistance of the material is improved.

The application relates to the technical field of silicone rubber, and particularly discloses a wear-resistant and high-temperature-resistant silicone rubber composition and a preparation method. The silicone rubber composition comprises the following raw materials in parts by mass: 55-70 parts of methyl vinyl silicone rubber, 15-20 parts of methyl phenyl vinyl silicone rubber, 5-10 parts of polytetrafluoroethylene micro powder, 10-18 parts of modified POE, 4-8 parts of reinforcing filler, 2-4 parts of processing aid, 18-25 parts of fumed white carbon black, 1-3 parts of divinyl tetramethyl disilazane, 1.5-3 parts of vulcanizing agent and 0.5-2 parts of crosslinking aid. The raw materials are mixed in a banbury mixer, melt-blended in a torque rheometer and formed into a plate in a plate vulcanizing machine to obtain the wear-resistant and high-temperature-resistant silicone rubber composition. The silicone rubber composition prepared through the synergistic effect of the raw materials has excellent wear resistance, high-temperature resistance, excellent mechanical properties and good stability.

The invention relates to the technical field of polyester materials, in particular to a high-elasticity polyester degradable plastic film and a preparation method thereof. The invention discloses a polylactic acid composite material, which is prepared from the following components in parts by weight: 45 to 55 parts of modified polylactic acid, 12 to 16 parts of tributyl citrate, 0.3 to 0.5 part of bile acid, 1 to 5 parts of nano silicon dioxide, 0.5 to 0.9 part of cellulose nanofiber, 0.1 to 0.5 part of vitamin E antioxidant, 0.1 to 0.3 part of UV-326 ultraviolet light absorber and 2 to 6 parts of talcum powder, wherein the modified polylactic acid is prepared by mixing polylactic acid and dihydrosphingosine according to a mass ratio of 10: (0.6-1.2); polylactic acid is modified by adopting sphingosine, a long hydrocarbon chain is introduced through an amido bond, the elastic property of the film is improved, the application of the polylactic acid film in a high-humidity environment is improved by utilizing the hydrophobicity of the long hydrocarbon chain structure, and the compatibility problem between the modified polylactic acid and other components is solved by adopting natural emulsifier bile acid. The mechanical property of the film is improved.