33results about How to "Good thermodynamic compatibility" patented technology

The invention discloses a comb-shaped stem grafting copolymer containing reactive group and a preparation method and application thereof. The copolymer is a comb-shaped stem grafting copolymer by taking small molecule monomer B as the main chain, and giant molecule monomer A as the side chain. According to the method, the giant molecule monomer A and the small molecule monomer B are copolymerized to form the comb-shaped stem grafting copolymer of which the main chain is the small molecule monomer B and the side chain is the giant molecule monomer A. The comb-shaped stem grafting copolymer disclosed by the invention can serve as the chain extender of a polymer or a polymer blend, the compatibilizer of the polymer blend, the hydrolytic stabilizer, adhesive and anti-leakage agent of the polymer blend, and is used for coatings of wood, metal or plastic. The reactive group in the copolymer has very high reaction activity, and can react with various end groups of polyamide and polyester. Methacrylate monomers have thermodynamics compatibility with various polymers. The reactive group can react with the end hydroxyl group or the end carboxy group of polyester, so that the comb-shaped stem grafting copolymer can serve as the chain extender, and the processing and application properties of the material are improved.

The invention relates to a three-dimensional curled elastic fiber and a preparation method thereof, and especially relates to an elastic fiber proto-filament, which is prepared by the following steps:taking modified co-polyester and polyethylene glycol tere-phthalate as raw materials and then subjecting raw materials to parallelly compounded asymmetric melt spinning, circular blow cooling, oiling, reeling, and bucket falling. The elastic short fiber with a three dimensional curling property is prepared by subjecting the proto-filament to following steps: bundling, drawing, oiling, tightened thermoforming, and cutting. The modified co-polyester is prepared by adding a modifying component (tween) in the synthesis process of polyethylene glycol tere-phthalate to carry out ester exchange andpolycondensation. The modifying component (tween) is an aliphatic hydrophilic flexible chain macromolecule, can form modified block co-polyester with polyester hard sections, and can obviously enhancethe water moistening property of polyethylene glycol tere-phthalate. The prepared three-dimensional curled elastic fiber has the advantages of high fluffiness and high elastic recovery rate, has a normal pressure boiling dyeing effect, and is widely used in fields such as home textile, clothes, and the like.

The invention belongs to the technical field of modification of high molecular composite materials and in particular relates to a fiber-enhanced polypropylene material and a preparation method thereof. The polypropylene material takes high-crystallinity homopolymerized polypropylene as a basic component and polyketone resin is added to improve the wear resistance and mechanical properties of the material; compound fibers composed of chopped carbon fibers and aluminum fibers are added, and graphene is added to improve the mechanical strength and heat and electricity conductivity of the material; a compatibilizer is added to improve the binding force between raw materials, so that the mechanical properties of the material are improved; and an antioxidant is added to improve the anti-ageing performance of the material and a lubricant is used for reducing the friction generated in a material processing process. The material has the advantages of high strength and high modulus, heat conduction and electricity conduction, high temperature resistance, excellent size stability and the like, and can completely meet the functional requirements of automobiles, machines and chemical heat exchange parts on the material under a severe environment.

The invention belongs to the field of function materials, and specifically relates to a photopolymer/liquid crystal/zinc sulfide nano-composite holographic grating and a preparation method therefor. The method comprises the steps: employing a single-functionality acrylamide monomer, a multi-functionality cross-linking agent, liquid crystal, zinc sulfide nano-particles and photoinitiator as raw materials, mixing the raw materials to form mixed solution, pouring the mixed solution into a liquid crystal box, and carrying out exposure through the interference light, thereby obtaining the photopolymer/liquid crystal/zinc sulfide nano-composite holographic grating. The diffraction efficiency of the photopolymer/liquid crystal/zinc sulfide nano-composite holographic grating is higher than 90%, and a drive voltage is less than 2.5V/micron. Meanwhile, the photopolymer/liquid crystal/zinc sulfide nano-composite holographic grating is high in diffraction efficiency, and is low in drive voltage. The photopolymer/liquid crystal/zinc sulfide nano-composite holographic grating is good in application prospects in the fields of 3D display, laser modulation, pohotonic crystal fibers, data storage, environment monitoring, and biosensing.

The invention discloses a highly-wear-resistant plastic sheave liner and a preparation method thereof. The liner consists of the following components in parts by weight: 100 parts of nylon, 10-20 parts of aramid fiber, 15-20 parts of hollow glass beads, 5-15 parts of bauxite, 5-15 parts of barite, 1-3 parts of magnesium stearate, 0.5-1.5 parts of a titanate coupling agent, 10-15 parts of dioctyl phthalate, 1-3 parts of antimony trioxide, 5-10 parts of decabromodiphenyl ether, 10-15 parts of conductive carbon black and 0.5-1.5 parts of an antioxidant. The preparation process is simple, and the prepared plastic liner has good antistatic and flame-retardant properties, can keep relatively high tensile property, and is long in service life; and the sheave liner is good in seasoning crack resistance and moisture resistance, and is particularly suitable for use in severe environments with sprinkling water, strong corrosivity and the like in mines.

The invention discloses a method for preparing a weather-resistant cable sheath material. The method comprises the following steps: weighing a PVC (Polyvinyl Chloride) resin, a linear low-density PE (Poly Ethylene) resin and an ethylene-vinyl acetate copolymer, uniformly mixing to obtain a main material, putting the prepared main material into a single screw rod extruder for commixing, pelleting to obtain a basic resin, adding the basic resin into an internal mixer, mixing, subsequently adding a plasticizer, talcum powder, nano calcium carbonate, an MBS (Methacrylate-Butadiene-Styrene) resin, a filler and a lubrication additive, uniformly mixing, adding dipentamethy lene thiuram hexasulfide and N,N'-m-phenylene bismaleimide when the temperature of the material is kept at 102-105 DEG C, mixing for 30-60 minutes, thinning, and extruding to obtain the weather-resistant cable sheath material, wherein the extrusion temperature is 180-195 DEG C, and the pressure intensity of the steam is controlled at 1-1.5MPa in the extrusion process. The weather-resistant cable sheath material is high in hardness, is abrasion-resistant, good in environment crack resistance, excellent in weather resistance and simple in preparation method.

The invention discloses a manufacturing process of an automobile engine sealing gasket. The invention uses raw nitrile rubber as a raw material, modifies the nitrile rubber with a small amount of acrylate rubber, firstly swells and dissolves it in a solvent, and then under the condition of mechanical stirring, successively Add reinforcing filler, active agent, anti-aging agent, vulcanizing agent, plasticizer and other additives, stir and mix evenly, and dilute with a solvent to a suitable viscosity, and apply it to the surface-treated metal plate by dip coating On, vulcanization molding, the preparation of nitrile and acrylic compound sealing gasket with rubber metal.

The invention discloses a preparation method of a low-melting-point composite polyester fiber with a porous structure, a composite fiber is prepared from low-melting-point polyester and fiber-grade polyester through a skin-core composite spinning method, a skin layer in the composite fiber comprises the low-melting-point polyester and a pre-activator, and a core layer is the fiber-grade polyester; and activating the composite fibers to prepare the porous-structure low-melting-point composite polyester fibers, and forming the porous-structure low-melting-point composite polyester fibers through hot air. The composite fiber is activated by a certain water solution, and micropores with the diameter of 0.1-1.0 micron are formed on the surface of the activated composite fiber. The porous composite low-melting-point polyester fiber is excellent in mechanical property, the surface porous structure endows a high specific surface area, the fiber water absorption rate is remarkably improved, meanwhile, when the porous composite low-melting-point polyester fiber is used as a hot melting bonding material, the bonding strength between fibers is high, high resilience under the action of strong external force can be achieved, and the application requirement of high-grade three-dimensional structure non-woven fabric is met.

The invention relates to a low-temperature-resistant low-hardness thermoplastic elastomer and a preparation method thereof, and belongs to the field of high-molecular elastomers. The low-temperature-resistant low-hardness thermoplastic elastomer is prepared from the following raw materials in parts by mass: 10-40 parts of polypropylene resin, 60-90 parts of powdered styrene-butadiene rubber containing carbon nanotubes, 5-20 parts of polyisobutene, 1-5 parts of a vulcanizing agent, and 0.1-1 part of an accelerant. According to the invention, styrene-butadiene rubber and polypropylene resin are taken as basic raw materials, a dynamic vulcanization technology is adopted, the powdered styrene-butadiene rubber containing carbon nanotubes is prepared by a co-flocculation process of a carbon nanotube emulsion and a styrene-butadiene rubber emulsion, the powdered styrene-butadiene rubber is blended with polypropylene resin, and low-molecular-weight polyisobutene is used for oil-filled softening to prepare the low-temperature-resistant low-hardness thermoplastic elastomer. The problem of large permanent deformation caused by poor dispersibility of the filler is solved by using the co-flocculation process of the carbon nanotube emulsion and the styrene-butadiene rubber emulsion, the hardness of the TPV product is reduced by filling the low-molecular-weight polyisobutene, and the TPV has excellent low-temperature resistance.

The invention discloses a nitrile rubber-modified polylactic acid composite material and a preparation method thereof. The composite material comprises, by weight, 12 to 29 parts of Manila hemp fibers, 3 to 15 parts of China hemp fibers, 5 to 16 parts of banana leaf fibers, 12 to 26 parts of nitrile rubber, 8 to 17 parts of polycaprolactone, 3 to 11 parts of polyurethane, 1 to 9 parts of dicumyl peroxide, 3 to 8 parts of a L-lactide monomer, 1 to 7 parts of maleic anhydride and 25 to 55 parts of polylactic acid. The nitrile rubber-modified polylactic acid composite material flexibilizer has good thermodynamical compatibility with polylactic acid. The composite material has obvious toughening effects.