156 results about "Reactive extrusion" patented technology

The invention provides a preparation method and application of a dynamic covalent bond compatibilized thermoplastic blend, and relates to the technical field of high polymer materials, the method comprises the following steps: (1) carrying out melt blending on at least two incompatible or partially compatible thermoplastic polymer blends, a reaction reagent containing acid anhydride or carboxyl groups, an initiator and an auxiliary agent according to a mass ratio of 100: (0.5-12): (0.05-1.5): (0.5-12), carrying out reactive extrusion to obtain a grafted modified material; and (2) carrying out melt blending on the grafted modified material, a cross-linking agent containing an epoxy group or a hydroxyl group and a catalyst according to a mass ratio of 100: (1-20): (0.1-5), and carrying out reactive extrusion to form a dynamic covalent bond network so as to obtain the compatibilization blend. According to the invention, the compatibility and mechanical properties of the thermoplastic blend are improved, and the problems of high recovery cost, complex recovery technology, serious plastic pollution and the like of the waste thermoplastic plastic blend in real life are solved.

The invention belongs to the technical field of polymer composite materials, and discloses a large-scale preparation method of a PPS-based composite material with low expansion and high dimensional stability. According to the method, a multi-scale synergistic enhancement system of graphene and nano silicon dioxide is constructed, a maleic anhydride grafted PPS compatilizer is introduced into melt blending, and interface chemical anchoring is achieved through amino-maleic anhydride-epoxy ternary reaction. The filler is premixed according to the mass ratio of 1: 1 after being subjected to surface functionalization, the total content is 15-30 wt%, and the composite material is obtained through twin-screw reactive extrusion and injection molding. The invention provides the large-scale preparation method of the low-expansion high-dimensional-stability PPS-based composite material which is reasonable in structural design, high in process controllability, excellent in performance index and suitable for industrial production, and the problem that thermal expansion suppression and interface strengthening are difficult to consider at the same time in the prior art is solved.

The invention relates to the technical field of multi-layer material preparation, in particular to a high-light-transmittance weather-proof impact-resistant striped sound insulation board. The problem that transparency, weather resistance and sound insulation effect of a traditional stripe material are difficult to consider at the same time is solved. The light scattering and absorption center is reduced and high transparency and low haze are realized through reactive extrusion of the recycled material, combination of high-temperature adsorption activated carbon, multi-stage high vacuum and deep purification of a reactive decolorizing agent, and matching of transparent dispersion diffusion master batch and a compatilizer. The surface layer adopts the core-shell weather-resistant master batch and the secondary high-energy UV fluorosilicone curing coating for double shielding of ultraviolet and inhibition of photodegradation and yellowing; styrene-maleic anhydride damping resin is introduced into the middle layer, and uniform inclined micropores and asymmetric stripes formed by supercritical CO2 are combined, so that the medium and low frequency sound insulation index is improved; the bottom layer is repaired and guaranteed to be durable in impact resistance by virtue of a core-shell toughening agent and molecular chain extension; the defects of traditional products are overcome, and the service life requirement of sound barriers for expressways and rail transit is met.

The invention discloses a modified polypropylene composite material as well as a preparation method and application thereof, and belongs to the technical field of high polymer materials, and the modified polypropylene composite material is prepared by introducing a surface-activated two-dimensional functional filler, constructing a multiphase toughening system, designing a unique interface self-adaptive dynamic cross-linked network and combining a supercritical carbon dioxide assisted reactive extrusion process. And the technical bottlenecks of the traditional polypropylene composite material in the aspects of dimensional stability, rigidity-toughness balance and multifunctional integration are systematically solved. The composite material prepared by the invention has extremely low molding shrinkage rate (lower than 0.1%), excellent mechanical properties, efficient halogen-free flame retardance (UL-94V-0 level) and controllable antistatic performance. The preparation method is scientific in technological process and high in in-situ reaction efficiency, the efficient, continuous and green preparation process is achieved, and the method has remarkable industrial application value in the high-end fields of new energy automobiles, precision electronics, rail transit and the like.

The invention relates to the technical field of high polymer materials, and discloses a PVC (polyvinyl chloride) pipe for communication wiring and a preparation method thereof, and the pipe is prepared from polyvinyl chloride resin, a calcium-zinc composite heat stabilizer, stearic acid, polyethylene wax, maleic anhydride grafted polyethylene, an acrylate processing aid, nano calcium carbonate and an active lubricating precursor. The active lubricating precursor is a mixture formed by compounding amino-terminated polysiloxane and zinc stearate through heating and swelling. The preparation method of the PVC pipe for communication wiring comprises the steps of pre-preparation of the active lubricating precursor, multi-stage temperature-control high-speed mixing and reactive extrusion molding. Through in-situ chemical reaction of amino-terminated polysiloxane and maleic anhydride grafted polyethylene in the extrusion process, chemical anchoring of lubricating molecules is realized, the problem of precipitation of a lubricant is solved, and meanwhile, the lasting smoothness, impact strength and dimensional stability of the inner wall of the pipe are improved by cooperating with nano calcium carbonate.

The invention belongs to the technical field of polymer materials and electric wires and cables, and discloses a high-toughness cable composite material and a preparation method and application thereof. The preparation method comprises the following steps: (1) adding silane-terminated liquid polybutadiene, hydroxyl silicone oil and an organic tin catalyst into an anhydrous solvent, uniformly mixing, heating to 80-100 DEG C, carrying out dealcoholization condensation reaction, and evaporating to remove the solvent after the reaction is completed, so as to obtain an organic silicon modified polybutadiene cross-linking agent; and (2) adding the obtained organic silicon modified polybutadiene cross-linking agent, PE, EVA, a reinforcing filler and an initiator into an extruder in an oxygen-free atmosphere, carrying out melt blending cross-linking reaction, and carrying out extrusion molding to obtain the high-toughness cable composite material. Compared with a conventional vinyl silane cross-linking agent, the organic silicon modified polybutadiene cross-linking agent disclosed by the invention can remarkably improve the mechanical strength, flexibility and weather resistance of the obtained cross-linked polyethylene composite material.

The invention relates to the technical field of high polymer materials and flame retardance, in particular to application of an efficient viscous compound material in oxygen barrier flame retardant materials, flame retardant polyolefin with hydroxyl is added into a high-shear twin-screw extruder, nano layered silicate and a reactive high polymer tackifier are sequentially added for reactive extrusion after melting, and the flame retardant polyolefin is obtained. And adding a micron-sized inorganic flame retardant and a carbon aid to the downstream of an extruder for blending, and finally cooling and pelletizing through an underwater pelletizing system to obtain the high-efficiency viscous compound material. According to the invention, a chemical bonding compatibilizing and toughening system is constructed through in-situ reaction of maleic anhydride grafted polypropylene and epoxy group functionalized SEBS, and complete stripping of nano-montmorillonite is realized by combining a step-by-step extrusion process, so that the problem that the mechanical property and flame retardance of a traditional high-filling flame-retardant material are difficult to consider at the same time is solved; the material has high limit oxygen index, high carbon residue rate and excellent tensile property, and the oxygen barrier layer is endowed with excellent mechanical toughness.

According to an example aspect of the present invention, there is provided a method for converting a plant material to a hardenable biomass by means of a reactive extrusion in a series of extrusion modules, which exposes carbohydrate compounds of the plant material.

This invention discloses an aqueous dispersion of a polyhydroxyalkanoate-grafted ethylene-acrylic acid copolymer with a self-emulsifying core-shell structure, its preparation method, and its recyclable paper packaging, belonging to the field of reactive modification of polymer materials and green packaging technology. This invention employs in-situ reactive extrusion technology to construct stable microparticles with a hydrophobic polyhydroxyalkanoate core and a hydrophilic ethylene-acrylic acid copolymer salt as the shell, overcoming the industry challenge of poor compatibility of bio-based materials. The aqueous dispersion requires no external emulsifier, achieving the same excellent barrier and heat-sealing effects with a lower coating weight, significantly reducing usage costs. Its unique alkali-induced swelling mechanism endows the coating with intelligent peeling properties, achieving efficient separation of the coating and fiber during resizing, greatly improving the purity of recycled fibers.

The present invention relates to a method for preparing esterified flour as resistant starch, through cross-linking by esterification process through hot air oven and alternative method (reactive extrusion), comprising the steps of: for hot air oven, preparing acid aqueous solution; adding flour into the solution; incubating, and drying the slurry in hot air oven to get esterified flour; and washing the flour, and the resistant starch processed by the method thereof and for reactive extrusion, preparing and mixing flour with citric acid aqueous solution; reactively extruding the dried mixed flour; feeding the extruded dried mixed flour; adjusting a screw rotation speed of the extruding machine; stabilizing the weight of the starch citrate extrudate; grounding and sieving the stabilized starch citrate extrudate; and removing unreacted citric acid, and the neutral acid-base resistant starch citrate product processed by the method thereof. The purpose of the invention is to produce resistant starch citrate classified as resistant starch type 4 (RS4) to improve the digestion-resistant property of flour to be the key ingredient of the food helping develop the world food products, in the manufacturing scale, to have properties beneficial to health, as well as to add value to plant- based flour products.

The invention discloses a PC / PET composite material which comprises the following components in parts by weight: 50-60 parts of PC, 15-35 parts of PET, 2-10 parts of graphene, 10-12 parts of mineral powder, 0-6 parts of a flexibilizer, 0.1-1 part of a lubricant and 0.1-0.5 part of an antioxidant, and the mineral powder is modified by a silane coupling agent, methanol and an acid solution. The invention also provides a preparation method and application of the PC / PET composite material. According to the PC / PET composite material and the preparation method and application thereof provided by the invention, PC, PET, mineral powder and graphene with different molecular weight distributions are adopted for reactive extrusion, and a ball milling process is combined, so that the heat conductivity coefficient of the PC / PET composite material is improved, and the balance of rigidity and toughness is kept.

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

The invention relates to the technical field of high polymer materials, in particular to a pumice powder modification-based linear low-density polyethylene master batch and a preparation method thereof. The problem that an existing pumice powder modified polyethylene master batch is poor in aging resistance when being used for preparing a film is solved. The master batch disclosed by the invention is prepared from linear low-density polyethylene resin, pumice powder modified by KH-560 and a light stabilizer 944, activated nano zinc oxide, maleic anhydride grafted polyethylene, polydimethylsiloxane, a composite antioxidant and zinc stearate. During preparation, the modified pumice powder and the activated nano zinc oxide are prepared through hydrolytic condensation and loading processes, and then the linear low-density polyethylene master batch is obtained through high-speed premixing and twin-screw reaction extrusion granulation. Finally, a film prepared from the linear low-density polyethylene master batch has good aging resistance.

The invention discloses a preparation method of starch plastic with low surface energy and high hydrophobicity. The thermoplastic starch plastic comprises the following components in percentage by weight: 73% of starch, 21.8-24.5% of lactic acid and 2.7-5.5% of bleached shellac. The preparation method comprises the following steps: uniformly mixing starch, lactic acid and bleached shellac according to a certain ratio, and preparing the thermoplastic starch plastic by a reactive extrusion (single-screw or double-screw extruder) method. The thermoplastic starch plastic has excellent water resistance, the lowest surface energy of the thermoplastic starch plastic can reach 38.41 mJ / m < 2 >, the maximum surface water contact angle of the thermoplastic starch plastic can reach 90.7 degrees, and the purpose of hydrophobicity of the thermoplastic starch plastic is achieved; in addition, compared with traditional glycerin plasticized thermoplastic starch plastic, the tensile strength can be improved by 3-7 times, certain elongation at break can be kept, and the mechanical property is also remarkably improved.

The application belongs to the field of TPU colorants, and specifically provides a preparation method of a TPU special macromolecular colorant, comprising the following steps: 1) taking oligomer dihydric alcohol, colored dihydric alcohol, chain extender, and isocyanate for standby; 2) uniformly mixing the oligomer dihydric alcohol, the colored dihydric alcohol, the chain extender, and the isocyanate, then reacting and extruding in a double-screw extruder, and then cooling, granulating, and drying to obtain the TPU special macromolecular colorant. The TPU special macromolecular colorant prepared by the application has the advantages of good compatibility, good dispersibility, good migration resistance, and high gloss.

The invention discloses a corrosion-resistant and mildew-proof wood-plastic floor and a processing method thereof, and relates to the technical field of wood-plastic floors, the processing method comprises the following steps: carrying out refined pretreatment on wood powder to obtain fine wood powder meeting the requirements of particle size and dryness; the method comprises the following steps: pretreating a plastic base material through recycled polyethylene plastic particles, removing impurities and adjusting the particle size of the particles; an epoxy functional mildew preventive is synthesized in situ and is used for forming covalent bonding with a wood-plastic matrix subsequently; mixing the pretreated plastic base material, the wood flour and the epoxy functional mildew preventive in sequence to obtain a uniform material; bonding and plasticizing of the materials are achieved through a reactive extrusion process, and a molten profile is formed; carrying out on-line shaping and gradient cooling on a molten profile obtained by reactive extrusion, eliminating internal stress, and carrying out curing molding; and fixed-length cutting and finish machining are conducted on the sectional material subjected to gradient cooling and curing, and the finished corrosion-resistant and mildew-proof wood-plastic floor is obtained.

The invention relates to the technical field of cable insulation materials, in particular to an anti-aging chemical crosslinked polyethylene cable insulation material and a preparation process thereof. The insulating material is prepared from the following components in parts by mass: 50 to 60 parts of low-density polyethylene, 20 to 25 parts of polyolefin elastomer, 10 to 15 parts of maleic anhydride grafted SEBS (Styrene-Ethylene-Butylene-Styrene), 1.5 to 2.5 parts of dicumyl peroxide, 15 to 20 parts of composite flame-retardant filler and 3 to 5 parts of anti-aging composition, the preparation process comprises the following three steps: firstly, preparing the core-shell structure flame-retardant master batch of zinc borate coated talcum powder through ball milling and melt blending; secondly, mixing the anti-aging component with a polyolefin elastomer to prepare an anti-aging master batch; and finally, mixing the matrix resin with the two master batches and the cross-linking agent, carrying out reactive extrusion in a four-section temperature zone (150-195 DEG C), and carrying out water-cooling cutting and drying to obtain a finished product. The insulating material has the characteristics of no toxicity, long-term high temperature resistance, aging resistance and excellent flame retardance, and is suitable for low-voltage to medium-voltage power cables.

The application provides a kind of open-cell foamed polypropylene material and preparation method, and the preparation method of open-cell foamed polypropylene material includes: polypropylene is reacted with first initiator extrusion to obtain low molecular weight polypropylene;Low molecular weight polypropylene is mixed with polypropylene according to preset ratio, second initiator, grafting monomer, antioxidant and the like are melt grafted to obtain short branched chain structure polypropylene;After short branched chain structure polypropylene is foamed, open-cell foamed polypropylene material is obtained.The scheme of the application utilizes low molecular weight polypropylene and grafting monomer to graft together on polypropylene molecular chain, improves the foaming performance and open-cell structure of polypropylene.

The application discloses acetoacetamide modified polyvinyl alcohol and a preparation method thereof, and the preparation method comprises the following steps: reacting p-ester and an acetoacetamide reagent at 20-80 DEG C for 1-3h in a polar solvent to generate N-acetoacetyl p-ester; then, the N-acetoacetyl p-ester is mixed with an alkaline catalyst and polyvinyl alcohol, and is added into a double-screw reaction extruder to generate N-acetoacetyl p-ester modified polyvinyl alcohol crude product; finally, the crude product is powdered, washed with methanol for three times to remove the catalyst and reaction inorganic salt, and is filtered and dried to obtain the N-acetoacetyl p-ester modified polyvinyl alcohol. The AAE-PVA prepared by the application can be used as a protective colloid for polyvinyl acetate emulsion polymerization, has better water resistance than common polyvinyl alcohol, and the water resistance, tensile strength and stability of the prepared emulsion adhesive are obviously improved. The synthesis steps of the application are simple, the safety risk is low, and the reaction yield is high.

The invention belongs to the technical field of high polymer materials, and particularly discloses a preparation method of a high-strength anti-aging plastic material. The method aims at solving the problems that a poly (butylene succinate) (PBS) material is poor in hydrolysis resistance, prone to ultraviolet aging and insufficient in thermal stability. The method comprises the following steps: premixing 60-80 parts by weight of PBS and 10-20 parts by weight of specifically compounded polylactic acid; then adding nano titanium dioxide, an antioxidant and a light stabilizer, and carrying out high-speed mixing; doping 1-3 parts by weight of a polycarbodiimide anti-hydrolysis agent and 2-5 parts by weight of a benzotriazole ultraviolet light absorber at a low temperature; carrying out melting reaction extrusion on the mixture and the epoxidized soybean oil through a double-screw extruder at the temperature gradient of 150-185 DEG C; and finally, carrying out underwater pelletizing, rapid cooling, vacuum deep drying and programmed heating annealing stabilization treatment to obtain a final product which has excellent mechanical strength, long-acting hydrolysis resistance, high ultraviolet aging resistance and thermal stability and is suitable for the high-performance fields of outdoor precise instruments, automobile exterior trimming parts and the like.

The invention belongs to the field of high polymer materials, and discloses a method for efficiently catalytically synthesizing polylactic acid, which is characterized by comprising the following steps: adding lactide, a tin catalyst and an initiator into a reactor, quickly heating to 180 + / -20 DEG C under the protective atmosphere and stirring, and carrying out polymerization reaction for more than 10 minutes to obtain high-molecular-weight polylactic acid; the initiator is hydroxy acid and is monobasic acid. The lactide polymerization rate is greatly improved, the polymerization reaction can be completed within more than ten minutes, the lactide conversion rate is 94% or above, the molecular weight is 2.17 * 10 < 5 > Da or above, and the lactide reaches the level of commercial polylactic acid. Compared with a tin catalyst and a tin catalyst / alcohol composite catalytic system, the catalytic system has the advantages that the polymerization rate at the initial reaction stage is increased by 20-30%, and the reaction time is shortened by more than 80%. The catalytic system is applied to a process for synthesizing polylactic acid through reactive extrusion, and the production efficiency of an extruder can be remarkably improved.

The present application relates to a kind of polyglycolic acid biodegradable block copolyester film, mainly solve the existing polyglycolic acid material poor mechanical properties in prior art and cannot meet the application problem.The polyglycolic acid block copolyester film includes: 70~90 parts of polyglycolic acid and derivative block by mass percentage, 10~30 parts of polyethylene glycol block.In the present application, the required amount of glycolic acid and derivative, polyethylene glycol, reaction extrusion in double screw extruder, granulation drying, extrusion blowing film or casting is obtained after the described polyglycolic acid biodegradable block copolyester film, the obtained film material has excellent bonding performance.

The invention discloses a dope-dyed low-melting-point fiber material and a processing method thereof. Comprising the following steps: step 1, mixing terephthalic acid, ethylene glycol, isophthalic acid and adipic acid, adding tetrabutyl titanate, reacting at 250 DEG C for 3 hours, then raising the temperature to 275 DEG C, reacting for 2.5 hours, extruding and pelletizing, and drying in vacuum to obtain low-melting-point copolyester; 2, adding the low-melting-point copolyester, the coloring agent, the dispersing agent and the antioxidant into a double-screw extruder, extruding and pelletizing to obtain color master batches; and 3, mixing and melting the color master batch, the low-melting-point copolyester, the modified copolymer and the carbon nano tube, performing spinning, cooling, oiling, thermal traction and network treatment, and winding into a barrel to obtain a finished product. The preparation method has the beneficial effects that the regularity of a polyester molecular chain is destroyed by introducing isophthalic acid and adipic acid, and meanwhile, the mechanical property and the conductivity of the fiber are improved through the synergistic effect of the modified copolymer and the carbon nanotubes.

The invention relates to the technical field of metallocene polyethylene materials, in particular to an FFS heavy packaging film and a preparation method thereof. The problems of balance contradiction between rigidity and impact resistance of a traditional product and narrow heat-sealing window are solved. A finished product is prepared from modified metallocene polyethylene, POE grafted zinc salt ionomer, core-shell structure toughening particles, linear low-density polyethylene, functional filler and a processing aid. Polarization and ionization modification of metallocene polyethylene and POE are achieved through reactive extrusion, and the puncture resistance of the material is improved through the physical cross-linking effect of ion clusters and the multi-stage toughening effect of core-shell particles; and meanwhile, by virtue of the cooperation of the thermal reversibility of the ionomer and a specific film blowing process, the initial temperature of heat sealing is reduced, and the sealing safety problem in a dust environment is solved.

The invention relates to the field of high polymer materials, and discloses a multifunctional high-barrier polypropylene recyclable packaging film and a preparation method thereof, and the film structure sequentially comprises an anti-ultraviolet BOPP film, a first functional bonding layer, a composite barrier middle layer, a second functional bonding layer and a puncture-resistant CPP film from outside to inside. Wherein the outer layer of the anti-ultraviolet BOPP film contains nano zinc oxide and a high-molecular-weight hindered amine light stabilizer; ultra-high molecular weight polyethylene is introduced into the supporting layer of the puncture-resistant CPP film through a reactive extrusion process; the puncture-resistant granules are prepared through reactive extrusion, the composite barrier middle layer is prepared through magnetron sputtering and plasma treatment, and finally all the layers are subjected to hot-pressing compounding through the bonding layer containing the silane coupling agent. The film prepared by the invention has excellent ultraviolet resistance, puncture resistance, high barrier property, interlayer bonding strength and high-temperature dimensional stability.

The invention discloses a bonding ferrite material, which is prepared from the following main components in parts by weight: 100 to 150 parts of ferrite magnetic powder, 10 to 20 parts of polyurethane elastomer, 10 to 20 parts of bisphenol A epoxy resin, 2 to 5 parts of cross-linking agent, 2 to 4 parts of aluminate ester, 0.05 to 0.2 part of calcium stearate and 0.05 to 0.2 part of zinc stearate. The preparation method comprises the following steps: putting the polyurethane elastomer, the bisphenol A epoxy resin, the aluminate ester, the calcium stearate and the zinc stearate into a high-speed mixer in proportion, uniformly mixing, then adding the ferrite magnetic powder and the cross-linking agent until the materials are uniformly mixed and a cross-linking reaction is completed, and extruding to obtain the bonding ferrite material. Ferrite magnetic powder with the particle size of 1.05-1.35 microns is selected, so that the ferrite magnetic powder is more easily coated by a resin base material to obtain better surface magnetic performance, a polyurethane elastomer and bisphenol A type epoxy resin are compounded to serve as the resin base material, and the polyurethane elastomer and the bisphenol A type epoxy resin are cross-linked to generate a cross-linked modified resin composition, so that the strength of the resin composition is enhanced, and the service life of the resin composition is prolonged. Certain elasticity can be kept, and the situation that materials become brittle and are prone to damage is avoided.

The application discloses a kind of reaction extrusion glass fiber reinforced PA6 materials, which is prepared from the following components by weight parts: caprolactam 14.8-79.1 parts, auxiliary TMI-g 0.2-2 parts, glass fiber 20-80 parts, initiator 0.3-2 parts, antioxidant 0.2-0.6 parts, light stabilizer 0.2-0.6 parts. By the method of reaction extrusion caprolactam anionic ring-opening polymerization, glass fiber reinforced PA6 material is prepared, and the self-made TMI-g material is used as catalyst and compatibilizer, so that caprolactam is closely polymerized and crystallized around glass fiber, thereby obtaining modified material with excellent performance.

The invention discloses a preparation method of a high-performance polyethylene gas pipe, and belongs to the field of polyethylene gas pipe manufacturing. A core-shell structure topological entanglement polymer directly grows on the surface of a polyvinyl base material particle through an in-situ interfacial polymerization technology, a flexible highly-branched core layer is responsible for stress dispersion, a shell layer with a reactive functional group is used for subsequent compatibilization, and then serial melting reactive extrusion is carried out, so that the core-shell structure topological entanglement polymer is obtained. The preparation method comprises the following steps: carrying out in-situ reaction on a main toughening agent POE-g-GMA and an active functional group generated after deprotection of a topological entanglement polymer to form a PE-entanglement agent-POE chemical compatibilization structure, and finally carrying out pipe extrusion molding and online microwave heat treatment to promote post-curing and chain segment rearrangement. According to the invention, the problems of interfacial compatibility and dispersity of a multiphase system are fundamentally solved, molecular-level compounding is realized, and the prepared gas pipe has ultrahigh toughness, excellent crack propagation resistance and good long-term durability.

The invention relates to the field of engineering plastic composite materials. The invention relates to a low-warpage toughened polyhexamethylene adipamide material and a preparation method thereof. The preparation method comprises the following steps: synergistically compounding polyhexamethylene adipamide, glass fiber, polyhexamethylene adipamide-silicon dioxide reaction composite master batch and maleic anhydride grafted ethylene-1-octylene copolymer master batch, and carrying out reactive extrusion and blending granulation to obtain granules. The warping amount of a flat plate part formed by material injection molding is 0.10-0.60 mm, and the notch impact strength is 8-25 kJ / m. The problem that low warping and toughening of the polyhexamethylene adipamide glass fiber reinforced material are difficult to consider at the same time is solved. The method is suitable for injection molding products.

The invention belongs to the technical field of POE photovoltaic adhesive film modification, and provides a POE photovoltaic adhesive film modification auxiliary agent and a preparation method and application thereof.The POE photovoltaic adhesive film modification auxiliary agent is prepared through the steps that a certain amount of peroxide initiator, a reaction type hindered amine light stabilizer containing carbon-carbon double bonds and POE resin are mixed to be uniform, and then the mixture is put into a mold, and reacting and extruding in a double-screw extruder to obtain the product. The preparation method of the POE photovoltaic adhesive film modification additive is simple, large-batch production can be achieved, the bonding capacity and the anti-aging capacity of a POE photovoltaic adhesive film prepared from the POE photovoltaic adhesive film modification additive are improved, and precipitation of the POE photovoltaic adhesive film modification additive is reduced.