33results about How to "Play a coupling role" patented technology

The invention belongs to the technical field of impregnating compounds, and discloses a glass fiber impregnating compound and a preparation method and application thereof. The impregnating compound comprises a film-forming agent, a coupling agent, a lubricant, a wetting agent and a pH regulator, wherein the film-forming agent comprises two bisphenol A type epoxy resin emulsions with different epoxy equivalents. Compared with usage of an epoxy resin emulsion with a single epoxy equivalent as a film-forming agent, the film-forming agent disclosed by the invention has the advantages that the film-forming agent can ensure sufficient coating force of the epoxy resin emulsions on the surfaces of yarns and allow the yarns to have better softness; even if the yarns are stored for a long time, theyarns still have low stiffness, which is beneficial for subsequent processing and mechanical strength of a composite material; and meanwhile, the yarns have better damp-heat resistance and still havea good strength retention rate in a high-temperature and high-humidity environment due to matched use of the film-forming agent and the coupling agent.

The invention discloses a biodegradable polymer material compatibilized and blended by lignocellulose and a preparation method thereof. The biodegradable polymer material is composed of a resin mixture and a compatibilizer. The resin mixture is composed of resin and cellulose acetate or cellulose acetate propionate which is prepared from cellulose of poplar wood pulp. The resin is selected from any one of polycaprolactone, polylactic acid and polyhydroxybutyrate. The compatibilizer is a block copolymer of polycaprolactone-acid anhydride compound and the use amount of the compatibilizer is 2-30% of the total mass of the resin mixture. The preparation method provided by the invention comprises the following steps of: mixing celluosic resins to obtain the resin mixture; then compulsively feeding after adding the resin mixture and the compatibilizer into a feed bin of a double-screw extruder; cooling the extrudate by air and then dicing the extrudate into particles to obtain resin particles. The biodegradable polymer material and the preparation method provided by the invention have advantages of environmental friendliness, low cost, good combination property, stable product performance and higher promotion value.

The invention relates to a special high-conductivity material for a conductive powder coating. The special high-conductivity material is prepared from the following raw materials in parts by weight: 10-50 parts of a conductive material, 0.3-5 parts of a cosolvent, 0.5-5 parts of a coupling agent and 2-10 parts of a wetting agent. By the adoption of a constant-temperature high-speed mixing technology, a preparation material is applied to the conductive powder coating, and polar groups such as hydroxide radical and anhydride are introduced, so that the conductive material is liable to be in contact with resin to form a space conductive network, and the conductivity is improved; moreover, the high-conductivity material can be reacted with the hydroxide radical on the surface of inorganic filler, so that reactive silanol is generated, and the interface property, the compatibility, the dispersion property and the flowability of the synthesized resin and the inorganic filler are effectively improved. The phenomenon of layering of the conductive material and a resin base material in a production process is avoided; furthermore, the prepared conductive powder coating is stable in conductivity; when the coating layer achieves the same conductivity, the technology compared with a common production technology has the advantages that the use amount of the conductive material is reduced by 10-40 percent, and the cost is reduced.

The invention discloses a PET material with ultrahigh elongation at break and a preparation method thereof, and belongs to the technical field of polymer material modification. The PET material with the ultrahigh elongation at break is prepared from the following components in parts by weight: 75 to 90 parts of PET, 10 to 25 parts of toughening agent and 0.2 to 1 part of an antioxidant. An ethylene-acrylate elastomer grafted with glycidyl methacrylate (GMA) and a thermoplastic polyester elastomer (TPEE) jointly toughen the PET, so that a synergistic effect is generated, the elongation at breakof the PET is greatly improved, and the application field of the PET material is expanded.

The invention discloses an injection molding grade glass fiber reinforced PET (Polyethylene Terephthalate) micro-foamed composite material and a preparation method thereof. The composite material comprises 96-98wt% of a PET composite material and the balance of a chemical foaming agent, wherein the PET composite material comprises PET resin, a toughening agent, a cross-linking agent, modified glass fiber, an antioxidant, a lubricant and other aids. According to the invention, carbimide propyl triethoxysilane is adopted to modify the surface of alkali short cut glass fiber strands so as to enable the surface of the glass fiber strands to be endowed with active groups, the alkali short cut glass fiber strands are added into the PET resin to implement a chemical reaction with terminal hydroxyl, then a coupling function is achieved, the glass fiber dispersion is promoted, the fibers are distributed in a staggered manner to form a three-dimension net, a chain segment physical cross-linkingfunction is enhanced, and the sliding of a molecular chain is limited, so that the melt viscosity of a PET chain segment can be increased, and the mechanical strength of the composite material can beimproved.

The invention discloses a thermo-oxidative aging resistant PVC tubular product and a preparation method thereof. Modified nano barium sulfate is taken as an ageing resistant agent, the nano barium sulfate is firstly modified through sodium stearate, and the sodium stearate is wrapped on the surface of the nano barium sulfate, so that the dispersibility of the nano barium sulfate in a base body is improved, simultaneously the compatibility of the nano barium sulfate and the PVC base body is also improved, and the degree of crystallinity of the PVC improved; therefore, the material of the base body is denser, the oxygen diffusion rate is reduced, and the thermal oxidation stability of the material is improved; then, a rear earth coupling agent is used for graft modification, the rear earth coupling agent can play a coupling role, a relatively firm wrapping layer can be formed on the surface of the nano barium sulfate due to a unique outer electron layer structure of rear earth elements, inorganic rigid particles using rare earth complexes as shells and the nano barium sulfate as cores are formed, and the inorganic rigid particles are of a relatively high toughening modification effect on the PVC tubular product.

The invention discloses an abrasion-proof toughened PVC pipe modified by addition of rare earth coupling agent activated vermiculite and a preparation method thereof. The rare earth coupling agent activated vermiculite is used as packing and added into raw materials, the adding amount is small, and the cost is low; the vermiculite is treated with a rare earth coupling agent, the rare earth coupling agent can play a role in coupling, and a firm wrapping layer is formed on the surface of vermiculite powder due to the unique outer shell structure of rare earth elements, so that inorganic rigid particles with rare earth coordination compounds as shells and vermiculite particles as cores are formed, and the inorganic rigid particles have a high toughening and modification effect on the PVC pipe; meanwhile, organic modification treatment of the vermiculite enhances the interface bonding strength with matrix resin, and a liminated structure is likely to be stripped in the rubbing process, so that the abrasion-proof performance of the PVC pipe is effectively improved.

The invention provides bamboo powder/poly(butylene succinate)/starch biodegradable plastic and a preparation method thereof. The bamboo powder/poly(butylene succinate)/starch biodegradable plastic provided by the invention comprises the following components in parts by weight: 15-25 parts of bamboo powder, 30-45 parts of poly(butylene succinate), 15-25 parts of starch, 12-20 parts of talcum powderand the like. The bamboo powder/poly(butylene succinate)/starch biodegradable plastic prepared by the invention is wide in raw material source and safe, does not contain any chemical additive with toxic and side effects, can be used for producing disposable tableware products such as knives, forks, spoons, cup covers, straws, bowls and lunch boxes, can be completely degraded after being used, andis short in degradation period.

The invention discloses a high-performance double-sided toothed crawler belt for a robot and a preparation method thereof.The high-performance double-sided toothed crawler belt comprises a synchronous belt framework and a sizing material wrapping the synchronous belt framework, and the synchronous belt framework comprises a synchronous belt body, first belt teeth arranged on the inner side of the synchronous belt body and second belt teeth arranged on the outer side of the synchronous belt body; the rubber material is prepared from the following raw materials in parts by weight: 5 to 8 parts of polysiloxyborane hyperbranched polymer containing epoxy group, 10 to 30 parts of fluorinated phosphazene rubber, 10 to 20 parts of epoxy nitrile rubber, 70 to 90 parts of nitrile rubber and 2-[3-(2H-benzotriazole-2-yl)-4-hydroxyphenyl] The adhesive is prepared from the following components in parts by weight: 8 to 13 parts of ethyl 2-methacrylate/vinyl trimethoxy silane/phenyl vinyl sulfone/hydroxyethyl acrylate copolymer, 2 to 4 parts of octavinyl-POSS (Polyhedral Oligomeric Silsesquioxane), 0.8 to 1.2 parts of zinc 8-hydroxyquinoline, 5 to 8 parts of vulcanizing agent, 30 to 40 parts of filler and 0.8 to 1.2 parts of potassium hydroxide. The double-sided tooth crawler disclosed by the invention is good in aging resistance, excellent in high and low temperature resistance and wear resistance, good in mechanical property and long in service life.

The invention discloses a production process of a high-extensibility plastic packaging film, and belongs to the technical field of packaging films, and the production process comprises the following steps: 1, weighing raw materials in parts by weight; 2, drying the raw materials in a vacuum oven at 45 DEG C, then mixing, carrying out extrusion granulation in a twin-screw extruder at the temperature of 160 DEG C, blowing into cylindrical film bubbles by air compression, carrying out blow molding film forming in a film blowing auxiliary machine to form a film product, and finally cutting, separately rolling and packaging to obtain the high-extensibility plastic packaging film. The modified polypropylene carbonate is added, the modified polypropylene carbonate is obtained by mixing and extruding polypropylene carbonate, a modifier and auxiliary components, and the modifier plays a coupling role in a reaction process, so that a three-dimensional network structure is formed, and the mechanical property and chemical stability of the film are enhanced.

The invention provides a copper inner electrode conductive slurry for a multilayer ceramic capacitor and an application of the copper inner electrode conductive paste. The conductive paste comprises the following raw materials in parts by mass: 40-50 parts of copper powder; 0.1 to 2 parts of tantalum powder; 1-5 parts of ceramic powder; 0.1-2 parts of a dispersant; 0.1 to 0.2 part of a stabilizing agent; and 22.1 to 43 parts of glue. The glue comprises the following substances: an organic solvent, resin and a thixotropic agent in a mass ratio of (80-98): (2-4): (0.1-0.2). According to the invention, tantalum powder and mixed ceramic powder are added into a copper paste formula, an appropriate dispersing agent is selected, and the surface of copper powder is coated with oleic acid, so that oxidation of the copper paste can be effectively prevented before the copper paste is formed, the copper powder is better dispersed in the subsequent processing process, and copper electron migration can be effectively prevented during sintering due to addition of the tantalum powder. And the mixed ceramic powder is added to effectively inhibit the shrinkage of the copper electrode, so that the continuity of the copper layer is good.

The invention discloses a method for improving the compressive strength of alkaline pellets prepared from limestone. The method comprises the following steps that 1, treated magnesium oxide is prepared; 2, mixed mineral powder is prepared; and 3, a roasted material is prepared and pelletized, prepared green pellets are screened and roasted, and the use amount of adhesive bentonite is controlled to be 1%-2.5% of the weight of the roasted material. Magnesium oxide is subjected to primary treatment, so that magnesium oxide has high porosity, oxygen can enter the pellets through pores in the oxygen enrichment process, oxidation of iron ore particles is improved, the compressive strength of the pellets is improved, and the technical problems that the compressive strength of the alkaline pellets prepared from the limestone can be improved by increasing the roasting temperature within a certain range, but energy consumption is increased by the too high temperature, and the compressive strength of the pellets is affected due to the fact that excessive liquid phases are generated are solved.