2159 results about "Polymer blend" patented technology

A dual-molded silicone-polyamide composite article including a first molded piece that comprises a blend of polyamide and an ethylene-vinyl alcohol copolymer and a second molded piece that comprises a thermoset, hydrosilylation-cure silicone polymer. A portion of a surface of the second molded piece is autogenously bonded to a portion of a surface of the first molded piece.

Provided is a method of recycling textile blends, wherein the blend is heated by microwave irradiation to separate the blend components for reuse.

Formulations of pesticides are disclosed, specifically pesticidal blends of essential oils and other ingredients, that have been found to enhance the activity of the active pesticidal ingredients. The formulations may be, for example, emulsions or dust formulations. For example, a composition for controlling a target pest is disclosed that comprises at least one active agent and a formulation agent, wherein: the active agent is capable of interacting with a receptor in the target pest; the active agent has a first activity against the target pest when applied without the formulation agent and the composition has a second activity against the target pest; and the second activity is greater than the first activity.

The invention relates to polyethylene resin for melt spinning as well as preparation and application thereof, a preparation method of the polyethylene resin comprises the following steps: (1) adding raw materials including a main catalyst, a cocatalyst, a diluent and ethylene into a reactor, and carrying out polymerization reaction to obtain a slurry blend containing the resin and the diluent; (2) carrying out washing treatment on the slurry-like blend through a purified diluent in the discharging process, and then carrying out solid-liquid separation; and (3) drying the resin subjected to solid-liquid separation to obtain a polyethylene resin product. Compared with the prior art, the polyethylene resin prepared by the invention has the characteristics of low crystal point and difficulty in wire breakage during subsequent spinning, and can be directly stretched and oriented in a hot channel at an outlet of a spinneret plate to obtain a final fiber product, or the fiber product can be further obtained through multi-stage stretching of a hot roller on the basis; the strength of a fiber product can be higher than that of a fiber product of 15cN / dtex, and the melt spinning efficiency of the high-performance fiber is further improved.

A biaxially oriented industrial or household compostable film web having at least three co-extruded layers selected from the group consisting of a facing film layer, a sealant film layer, and a combination of sealant film layers and facing film layers, wherein the sealant film layer and the surface film layer each comprise from 0 wt% to about 80 wt% of a polyhydroxyalkanoate (PHA) and from about 20 wt% to about 100 wt% of a polylactic acid (PLA), and optionally a small amount of a blend of other biopolymers, other polymers, nucleating agents, chain extenders, fatty amides, and fillers; and a core film layer comprising from about 30 wt% to about 80 wt% of a polyhydroxyalkanoate (PHA), from about 20 wt% to about 40 wt% of a polylactic acid (PLA), and optionally a small amount of a blend of other biopolymers, other polymers, nucleating agents, chain extenders, fatty amides, and fillers.

The invention discloses a heavy metal curing agent and a curing method of heavy metals in coal gangue, and relates to the field of heavy metal pollution treatment. The heavy metal curing agent comprises a first curing agent, a second curing agent and a third curing agent; wherein the first curing agent comprises silt, fly ash and bentonite, the second curing agent comprises a blend and chitosan loaded on the surface of the blend, the blend comprises quartz sand and calcium carbonate, and the third curing agent comprises a silane compound. The curing agent has an excellent long-term curing effect on heavy metals, and a cured body formed by the curing agent has excellent compressive strength.

The invention relates to the technical field of food packaging materials, in particular to a cerium dioxide nano-enzyme modified antibacterial coating and application of the cerium dioxide nano-enzyme modified antibacterial coating in food packaging. The biomimetic mineralization layer comprises the following components in percentage by weight: 35-45% of a green base material, 8-12% of dopamine modified yttrium-doped cerium dioxide nano-enzyme, 4-6% of a composite antibacterial agent, 3-4% of a natural cross-linking agent, 2-3% of a degradable plasticizer, 1-2% of a biomimetic mineralization layer precursor and the balance of deionized water, the green base material is a blend of a chitosan-polyethylene glycol graft and polylactic acid; the doping amount of Y3 in the nano enzyme is 3-4at%. The antibacterial agent is excellent and lasting in antibacterial effect, has no migration risk of the antibacterial agent, and can guarantee food safety; a green base material and a degradable plasticizer are adopted, so that natural degradation is realized, and environmental pollution is avoided; the mechanical property is good, the aging resistance is realized, and the oxygen barrier property is strong; the food packaging box is suitable for various foods, effectively prolongs the shelf life, and meets the requirement of green packaging.

The invention provides a biaxially oriented nylon light conversion film as well as a preparation method and application thereof. A nylon / flaky nano silicon dioxide blend is used as a supporting layer, a nylon / boric acid functionalized terbium metal organic framework material blend is used as a variable light conversion characteristic layer, and the two-way stretching nylon light conversion film is obtained through synchronous two-way stretching. The film has dripping and variable light conversion characteristics, and can convert ultraviolet light into red orange light or blue light.

A lime-based cement extender composition and associated systems and methods are disclosed herein. A lime-based binder or cement extender includes lime particles comprising calcium hydroxide and / or calcium oxide, pozzolan particles including silicon dioxide and / or aluminum dioxide; and an admixture. The admixture is configured to promote reactions between the lime particles and the pozzolan particles. When the composition is mixed with cement to form a cement blend, calcium aluminum sulfate forms within 28 days of blending. Additionally or alternatively, the cement blend can have a Strength Activity Index (SAI) of at least 90%.

The invention relates to an adsorbent and a preparation method and application thereof, the adsorbent comprises a polymer matrix and a nanofiller uniformly embedded in the polymer matrix, the polymer matrix comprises a calcium / boron cross-linked polyvinyl alcohol-sodium alginate blend, and the nanofiller is sulfonic acid / carboxylic acid functionalized graphene oxide; the mass fraction of the nano filler in the adsorbent is 0.05%-0.60%; wrinkles and irregular hole structures are distributed on the surface of the adsorbent. The adsorbent is used for removing tritium in water and is high in adsorption capacity, stable in structure and good in recycling performance. The removal rate of tritium in the single-stage adsorption process is greater than 8.5%, and the removal rate of tritium in the third-stage adsorption process is 19.4-57.7%.

An improved Type C air conditioning hose is provided that meets or exceeds SAE J2064 and J3062 requirements, offers good flexibility and fracture resistance, and exhibits improved permeation ratings for refrigerants including R134a and R1234yf. The multilayer type C barrier air conditioning hose includes an inner elastomeric tube layer capable of direct bonding to plastic without an intervening adhesive. The inner elastomeric layer is prepared from a first elastomeric composition comprising a blend of an ethylene propylene diene terpolymer rubber (EPDM) and a chloroprene rubber (CR), phenylenedimaleimide, and a maleated compound.

The present application relates to the field of expandable polystyrene, and specifically discloses a polystyrene cleaning material and a preparation method thereof. The preparation method of the polystyrene cleaning material comprises the following steps: S1, crushing, melting, extruding and granulating the recycled foamed polystyrene after cleaning to obtain polystyrene particles; S2, mixing the polystyrene particles with styrene, a dispersant, an emulsifier, a filler, and a flame retardant, stirring evenly, and preparing a blend; S3, mixing the blend with toluene, phosphate, and water, polymerizing for 4-5 hours, adding a foaming agent and water, and keeping the temperature and pressure for 4-5 hours after immersion and foaming, cooling, discharging, washing, centrifuging, drying, and mixing with a coating agent. The polystyrene cleaning material of the present application has the advantages of less residual styrene monomer, high mechanical strength, and not easy to generate friction noise; in addition, the preparation method of the present application has the advantages of no need to crack the recycled polystyrene into styrene monomer for reuse, simple preparation method, and low energy consumption.

The invention discloses an n-type conductive polymer and a large-scale preparation method thereof, and the method comprises the following steps: mixing a polymeric monomer with anhydride and DMSO, and reacting under the protection of inert gas to obtain the n-type conductive polymer. According to the invention, the anhydride substance and the dimethyl sulfoxide are blended to generate a compound with oxidability in situ, so that low-cost and large-scale preparation of the n-type conductive polymer and other heteroatom substituted analogues / blends is realized. According to the invention, additional use of other oxidants is avoided, and acid anhydrides with relatively low price are adopted, so that the material cost is effectively reduced; meanwhile, due to the volatility of the acid anhydride or the derivative thereof, post-treatment can be simply carried out through vacuum concentration, and the cost required by dialysis purification treatment in the prior art is further reduced. In addition, the n-type conductive polymer provided by the invention has conductivity equivalent to that in the prior art, has good storage stability, and is beneficial to further promotion of industrialization of the n-type conductive polymer.

The invention belongs to the technical field of cables, and particularly relates to a high-temperature-resistant metallurgical vehicle-mounted flexible cable and a preparation method thereof. According to the high-temperature-resistant cable material, polyimide, polyphenylene sulfide and polybenzimidazole are matched, so that the high-temperature-resistant cable material is endowed with extremely high high temperature resistance, can resist the high temperature of 300 DEG C, and is extremely suitable for cable materials for metallurgy. Then, the flexibility of the material is improved by adding a flexible polyether-ether-ketone / nano silicon dioxide compound, and the surface of nano silicon dioxide is treated, so that the loading rate of polyether-ether-ketone can be increased, the phase separation phenomenon of polyether-ether-ketone in a blend is prevented, and uniform dispersion is promoted. And finally, the prepared high-temperature-resistant metallurgical vehicle-mounted flexible cable material is used as a filler and a sheath of the cable material, so that the cable structure is reduced, the production difficulty of the cable is reduced, the production process is simplified, and the material and process requirements are reduced, thereby achieving the purposes of reducing the cost and improving the production efficiency to a certain extent.

The invention discloses a composite film based on light-biological synergistic gradient degradation and a preparation method thereof, the composite film sequentially comprises a light response layer, a transition layer and a biological response layer from outside to inside, and the light response layer comprises a polycaprolactone matrix, a tetraphenylporphyrin iron photosensitizer and anatase type TiO2 nanorods; the transition layer is a gradient blend of polylactic acid and modified starch; the biological response layer comprises polyhydroxyalkanoate and bacterial cellulose nanofibers; through the design of the three-layer gradient structure and the construction of the bionic microchannel, the synergistic effect of light degradation, hydrolysis and biodegradation is realized; the composite membrane has excellent mechanical properties and environmental adaptability, the degradation period can be accurately regulated and controlled within 30-180 days, and the soil degradation rate within 60 days reaches 91% or above; the preparation method comprises the processes of electrostatic spinning, gradient co-extrusion and bacterial cellulose in-situ culture. The material can be widely applied to the fields of agricultural mulching films, food packaging and the like, and the problems that a traditional degradable film is poor in mechanical property and uncontrollable in degradation are solved.

Polymer compositions are disclosed containing at least one high molecular weight polyethylene polymer for producing gel extruded articles. In one embodiment, porous membranes are produced that have an excellent balance of properties including high porosity and high strength characteristics. In one aspect, very thin membranes can be formed having high strength characteristics.

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.

A germ-repellent plastic contains an anti-biofouling compound, and a basic plastic. The anti-biofouling compound is optionally selected from the group of a polyol, a polyether polyol, a polyol derivative, and a combination thereof; or the anti-biofouling compound is selected from the group consisting of a polyether, a poly (ethylene glycol) ether, a polysorbate, and a combination thereof; or the anti-biofouling compound is selected from the group consisting of poly (ethylene glycol) sorbitan monolaurate, poly (ethylene glycol) sorbitan monooleate, poly (ethylene glycol) sorbitol hexaoleate, ceteareth, and a combination thereof. The basic plastic is not a blend of a low-density polyethylene polymer and an ethyl vinyl acetate copolymer, a blend of a polypropylene polymer and an ethyl vinyl acetate copolymer, a blend of polyolefin elastomer polymers and a polyvinyl chloride polymer. A method for manufacturing such a germ-repellent plastic and a germ-repellent plastic item are also described.

The invention discloses a foamed polypropylene bead capable of being quickly formed by microwaves, the foamed polypropylene bead has a core-shell structure, a core layer material comprises high-melting-point high-modulus polypropylene, a shell layer material comprises a low-melting-point propylene copolymer and / or a polypropylene blend and a certain amount of a microwave heating aid, and the interior or surface of the foamed bead shell layer also contains a surfactant. The microwave heating aid can be rapidly heated under relatively low microwave heating power, so that the low-melting-point polypropylene material on the surface layer is rapidly melted and is fused and sintered with other surrounding foamed polypropylene bead shell layers, and the surface active agent can further improve the heating efficiency; the interior of the foamed polypropylene bead does not contain a microwave heating aid and a surfactant, low-power microwaves cannot enable the internal temperature of the foamed bead to rise too much, an original independent closed-pore structure can be kept, an obtained molded part is high in curing degree and good in surface sintering, the whole molding process is short in time and low in energy consumption, a large amount of cost is saved, and the method is suitable for large-scale production. The environment is protected.

The present disclosure relates to a biodegradable multilayer film comprising stacked on each other in the following order: a) a first outer layer comprising a first polymer selected from the group consisting of poly (butylene adipate-co-terephthalate) (PBAT), poly (butylene succinate) (PBS), poly (butylene succinate-co-adipate) (PBSA), and mixtures thereof; b) a core layer comprising a blend of thermoplastic starch (TPS) and polybutylene adipate terephthalate (PBAT); c) a second outer layer comprising a second polymer selected from the group consisting of poly (butylene adipate-co-terephthalate) (PBAT), poly (butylene succinate) (PBS), poly (butylene succinate-co-adipate) (PBSA), and mixtures thereof. The present disclosure also relates to a disposable bag, a bioreactor and a container suitable for mixing, packaging, storing or transporting biopharmaceutical substances, wherein the disposable bag, bioreactor and container comprise the biodegradable multilayer film.

The invention relates to the technical field of flexible stimulation response self-drivers, in particular to a preparation method of an electricity-temperature dual stimulation deformation reversible composite material driver, which comprises the following steps: firstly, carrying out chemical modification and solution ultrasonic dispersion on conductor particles to improve interface cohesiveness and improve interface bonding between a conductor and a polymer; melting, blending and compounding polyethylene vinyl acetate free radical double-group coupling by using a double-screw mixer to prepare a shape memory hemicrystalline and carbon-carbon single bond net-shaped cross-linked molecular network structure; uniformly doping and embedding conductor unit particles into a molecular network to construct a conductive three-dimensional network, and forming a conductive blend with a bicontinuous phase structure; and finally, thermally pressing the conductive blend to initiate a macromolecular free radical cross-linking reaction to prepare the electric-temperature dual-stimulation deformation reversible composite material driver with a conductive-semi-crystalline-cross-linked three-dimensional network structure. According to the invention, electric and thermal dual stimulation reversible deformation response of the shape memory composite material can be realized.

The invention provides a light super-soft fire-resistant flame-retardant optical cable and a preparation method thereof. The light super-soft fire-resistant flame-retardant optical cable sequentially comprises a high-temperature-resistant optical fiber, a filling layer, a flame-retardant loose tube, a reinforcing layer, a heat insulation layer and a fire-resistant flame-retardant layer from inside to outside, the fireproof flame-retardant layer comprises the following preparation raw materials in percentage by mass: 55-65% of plasma activated mineral powder, 25-35% of a thermoplastic elastomer base material subjected to irradiation crosslinking treatment, 8-12% of a phosphorus-nitrogen intumescent flame retardant and 1.5-2.5% of a silane coupling agent; the nano mineral powder comprises a magnesium aluminum silicate compound, and the thermoplastic elastomer matrix comprises a blend of SEBS (Styrene-Ethylene-Butylene-Styrene) and TPU (Thermoplastic Polyurethane). The fire-resistant flame-retardant layer forms a ceramic protection layer at high temperature to perform fire-resistant flame-retardant protection and prevent heat transfer, and meanwhile, the heat insulation layer is matched to further prevent heat from being transferred to the cable core, so that the performance of the optical cable is ensured not to be influenced.

The invention relates to a flame-retardant railway tunnel EVA waterproof board with a smoke suppression effect and a preparation method thereof. The EVA waterproof board comprises the following components in percentage by weight: 35-37% of waterproof board EVA composite resin particles, 4-11% of high-density polyethylene, 16-17% of linear low-density polyethylene and 35-45% of flame-retardant master batch. Wherein the flame-retardant master batch is obtained by extruding and granulating a blend of high-density polyethylene and a flame retardant, the flame retardant is obtained by performing surface coating modification on CTAB (ADP) by adopting gamma-aminopropyltriethoxysilane and vinyltriethoxysilane, and the CTAB (ADP) is obtained by coating the surface of CTAB with the modified ADP. On the premise of meeting the required mechanical property, the EVA waterproof plate can reach the flame retardant standard B1 grade of a building material, and the smoke yield is low.

The invention discloses a paper-based composite film, which adopts a four-layer structural design, and the outer layer is an ultraviolet shielding layer formed by coating TiO2 with lignin; the transition layer is composed of 32-64 PLA / PBAT alternating microlayers, and the multiple alternating transition layers form a zigzag gas barrier path; ag-coated ZIF-8 nanoparticles are loaded on the paper base layer, so that long-acting antibiosis is realized by slowly releasing silver ions; and the inner layer adopts a PPC / PBS blend to support the heat sealing layer with adjustable heat sealing strength. According to the preparation process, a gradient micro-layer structure is constructed through a multi-runner co-extrusion die head and a layer multiplier, silver ions are loaded to ZIF-8 through an ultrasonic-vacuum impregnation process, the hydroxyl density of the surface of the paper base layer is improved through plasma treatment, good interlayer strength is achieved, ester bond crosslinking is induced in a pre-irradiation mode, and the product is prepared. The paper-based composite film has ultraviolet shielding, gradient blocking, slow-release antibacterial and controllable heat sealing performance, the interface bonding strength of a traditional paper-based composite film is greatly improved, all components are biodegradable, and the paper-based composite film is suitable for packaging of food, medicine and the like.

A rubber composition having a nitrile and ethylene terpolymer, in particular a polymer blend of an acrylonitrile-butadiene copolymer (NBR) and an ethylene polymer. The composition has an NBR in an amount of from 30 to 50% by weight of the total composition. In some embodiments, the ethylene polymer is an EPDM rubber, an ethylene acrylic elastomer, or a chlorinated polyethylene. The composition may include an organic peroxide or other accelerator. The rubber composition can be used for synchronous belts having medium temperature to high temperature resistance, good fuel resistance, flexibility as low as-40 DEG C, and high structural integrity. In addition, the rubber composition allows the amount of a reinforcing material such as carbon black to be reduced.

The invention belongs to the field of shape memory of high polymer materials, and particularly relates to an amino side chain cross-linked shape memory polyarylene ether nitrile composite material as well as a preparation method and application of the amino side chain cross-linked shape memory polyarylene ether nitrile composite material. The preparation method of the composite material comprises the following steps: in an inert gas atmosphere, enabling a monomer containing a bisphenol group, 2, 2-bis (3-amino-4-hydroxyphenyl) propane, a water-carrying agent, an organic solvent, 2, 6-dihalobenzonitrile and a salt-forming agent to form a reaction system, so as to prepare a polyarylene ether nitrile copolymer with an amino side chain; and adding the obtained poly (arylene ether nitrile) copolymer and a monomer containing a terminal carboxyl group into an N, N-dimethylformamide solvent, adding a dehydrating agent, uniformly stirring to obtain a blend, stirring at 40-60 DEG C to enable the amino group and the carboxyl group to be subjected to dehydration, polycondensation and cross-linking, and synthesizing the shape memory poly (arylene ether nitrile) composite material with amino side chain cross-linking. The composite material has good mechanical properties and thermal stability, and also has a toughening function.

The invention discloses flame-retardant modified benzoxazine resin, and a preparation method of the flame-retardant modified benzoxazine resin comprises the following steps: blending a benzoxazine monomer with dihydric phenol which is used as a flame retardant and contains a boron acetal structure, and then curing the blend to obtain the flame-retardant modified benzoxazine resin, the preparation method of the dihydric phenol containing the boron acetal structure comprises the following steps: adding hydroxyphenylboronic acid, pentaerythritol and a water-carrying agent into a reaction container, adding an organic solvent, carrying out a stirring reaction at 80-100 DEG C for 4-8 h, and after the reaction is finished, carrying out rotary evaporation and drying to obtain the dihydric phenol, the water-carrying agent is any one of petroleum ether, benzene, cyclohexane and chloroform. The blending method of the benzoxazine monomer and the dihydric phenol is solution blending or melt blending, and the curing method is thermocuring or catalytic curing. The boron acetal structure in the used flame retardant can generate a condensed phase flame retardant and gas phase flame retardant synergistic effect, so that the flame retardant property of the benzoxazine resin reaches UL94V-0 level, and the boron acetal structure can promote char formation and improve the carbon residue rate of the benzoxazine resin.

The invention provides a toughened polylactic acid blend as well as a preparation method and application thereof, and belongs to the technical field of new materials. According to the invention, poly (p-dioxanone), chitin, polymethyl acrylate, glycerol, polycaprolactone, epoxypropane and polymethyl methacrylate in a specific ratio are adopted as a modified composite material, and the modified composite material and polylactic acid are subjected to melt blending under specific conditions to realize toughening modification of a polylactic acid material. Experiments prove that the toughening type polylactic acid blending material prepared by the method can effectively improve the toughness of polylactic acid, can also improve the degradation speed of polylactic acid, and has a wide application prospect.

The invention discloses a preparation method of high-foaming-ratio high-temperature-resistant and solvent-resistant foam. The preparation method comprises the following steps: carrying out melt blending on a matrix and a plasticizer, and molding to obtain a blend profile; the plasticizer is prepared from at least one of diphenylmethane diisocyanate and polymethylene polyphenyl polyisocyanate; the blend profile is placed in supercritical fluid, and polymer foam is obtained through pressure maintaining, pressure relief and cooling shaping; the pressure relief time is 5-10 seconds; and placing the polymer foam in water for cross-linking and curing to obtain the high-temperature-resistant and solvent-resistant foam with high foaming ratio. The high-temperature-resistant solvent-resistant foam with the high foaming ratio can reach the ultra-low density of 0.052 g / cm < 3 >, the processing temperature is far lower than the glass-transition temperature of a matrix, and the high-temperature-resistant solvent-resistant foam has good solvent resistance and excellent high-temperature mechanical properties.

The invention discloses a photovoltaic glass surface protection coating, a preparation method thereof and a preparation method of a coating in the technical field of coatings. The coating comprises the following components in parts by weight: 40-70 parts of a fluorocarbon resin blend, 1-10 parts of modified nano silicon dioxide powder, 0.1-1 part of a defoaming agent, 0.1-2 parts of a flatting agent, 0.1-2 parts of a curing agent and 10-80 parts of an organic solvent A, the fluorocarbon resin blend comprises polyurethane resin, soluble polytetrafluoroethylene resin, polyacrylic acid fluorine-containing resin and an organic solvent B, and the mass ratio of the polyurethane resin to the soluble polytetrafluoroethylene resin to the polyacrylic acid fluorine-containing resin to the organic solvent B is (100-300): (5-20): (10-50): (200-500). The super-hydrophobic self-cleaning glass has the advantages that the super-hydrophobic self-cleaning glass has super-hydrophobic self-cleaning performance and super-high light transmittance.