297results about How to "High tensile modulus" patented technology

A polymer composition is disclosed, which comprises a matrix polymer, a fluoropolymer that may be at least partially encapsulated by an encapsulating polymer, and a filler. Methods for making the polymer compositions and articles made of such compositions are also disclosed. The compositions and article can have improved tensile modulus, ductility, and/or impact properties.

The invention discloses a fiber-reinforced thermoplastic composite and a preparation method of the fiber-reinforced thermoplastic composite. The preparation method comprises the following steps that firstly, fibers are treated through a modified surface treating agent; secondly, the treated fibers in the first step are soaked in thermoplastic resin in the molten state; thirdly, the fibers which are soaked in the thermoplastic resin in the second step are cooled and solidified, so that the fiber-reinforced thermoplastic composite is obtained. The modified surface treating agent comprises, by mass, 0.5-15% of thermoplastic resin powder. The mechanical properties such as the tensile strength, the tensile modulus, the bending strength, the bending modulus and the cantilever beam notch impact strength of the fiber-reinforced thermoplastic composite prepared through the preparation method are greatly improved, and particularly the properties such as the bending strength, the bending modulus and the cantilever beam notch impact strength are improved by about 15% to the maximum degree.

The invention discloses a preparation method of a polycarbonate microporous material with bimodal distribution, aiming at solving the technical problem that the thermoplastic foam prepared by adopting the existing preparation method only has unimodal distribution or easily pollutes the environment. According to the technical scheme, the preparation method disclosed by the invention comprises the steps of: placing a polycarbonate sheet in CO2 fluid under a super-critical state to carry out saturation to obtain an even PC (polycarbonate)/CO2 mixture after being entirely saturated; carrying out first-time fast pressure relief within the time of 4-30 seconds, and keeping for 0.5-3 hours under the constant-temperature and constant-pressure state; carrying out second-time fast pressure relief within the time of 4-30 seconds, thus relieving the pressure in an autoclave to the atmospheric pressure; fast taking out the CO2 gas-containing polycarbonate sheet, transferring to a constant-temperature glycerol bath to carry out foaming; and finally, shaping the foamed polycarbonate sheet in an ice-water bath for 30 minutes to obtain the polycarbonate microporous material with bimodal distribution. The supercritical CO2 fluid used in the preparation method is low-cost, non-toxic and non-inflammable, and has no pollution to the atmosphere and water body, as well as no damage role to ozone sphere, thus being an environment-friendly physical foaming agent.

The invention discloses a method for preparing a high-strength polymer composite material. The method comprises the following steps of: S1: modifying a monomer into nano inorganic particles by chemical graft polymerization, and melting, blending and extruding the modified nano particles and a thermoplastic polymer to manufacture a rod-like preformed blank, or melting, blending and stamping the modified nano particles and the thermoplastic polymer to manufacture a flaky preformed blank, wherein the molar amount of the monomer is same as that of nano inorganic particles, the consumption of the nano inorganic particles is 1 to 3 weight percent of the thermoplastic polymer; S2: stretching the preformed blank at a temperature of between 130 and 150 DEG C and at a speed of 10 to 50 millimeters per minute, and cooling to obtain a fiber-like or flaky reinforced phase; and S3: preparing a film from a copolymer with melting point of 140 to 150 DEG C by a film blowing method, and preparing the composite material from the oriented reinforced phase and a matrix phase with low melting point through a tensile force self-adjusting die by a thin layer bedding-hot pressing method. By combining a self-reinforcing technology and an inorganic particle filling modified polymer composite material, the polymer composite material with remarkably improved tensile strength and tensile modulus can be obtained.

The invention relates to a low dielectric constant polyhedral oligomeric silsesquioxane (POSS)/ epoxy resin hybrid material and a preparation method. Epoxy resin and eight epoxy group polyhedral oligomeric silsesquioxane (G-POSS) are evenly mixed in a 80 DEG C breaker according to a certain proportion, an equivalent amount of curing agent triethylene tetramine (TETA) (an amino group in the TETA and an epoxy group in the G-POSS, epoxy resin (EP) are measured according to a 1:1 molar rate) is added and fully stirred, after vacuum defoamation is conducted for 20-30 minutes, the mixture is slowly poured into a preheating mold, conducted solidification in a stove 50 DEG C/ 2 hours, 70 DEG C/ 3 hours and 80DEG C/ 1 hour, cooled to room temperature along with the stove and processed for 4-6 hours after demolding. The low dielectric constant POSS/ epoxy resin hybrid material is small in average grain size and excellent in transparent performance, mechanical property and dielectric property.

The invention discloses macrofiber-reinforced long carbon chain nylon and a preparation method of the macrofiber-reinforced long carbon chain nylon. The macrofiber-reinforced long carbon chain nylon comprises the following components in parts by weight: 30-65 percent of nylon 1010, 0-30 percent of nylon 6, 0-30 percent of nylon 66, 30-60 percent of long glass fiber, 0.3-1 percent of an antioxidant and 0.5-2 percent of a lubricating agent. According to the macrofiber-reinforced long carbon chain nylon and the preparation method of the macrofiber-reinforced long carbon chain nylon, the problem that strength, modulus and the like cannot reach those of the traditional staple fiber reinforced nylon product is effectively solved; and meanwhile, the macrofiber-reinforced long carbon chain nylon has more excellent low moisture absorption property, size stability and low-temperature impact property and simultaneously meets the requirements of low-carbon emission and environment-friendly materials.

The invention provides a modified EVA microporous elastomer composite material and a preparation method thereof. In the prior art, the properties of the EVA microporous elastomer composite material are modified mainly by mixing fillings in the EVA, which cannot satisfy the use of the composite material in special fields. The formula includes EVA material, organic montmorillonite, polyurethane, styrene-butadiene rubber, foaming agent, zinc oxide, zinc stearate and stearic acid; and the preparation method comprises the steps of: adding the montmorillonite in the EVA for melting, shearing and dispersion treatment; mixing with the polyurethane and the styrene-butadiene rubber on a double-roller mixing machine after cooling; and adding auxiliary agent, thin-passing for more than ten times, taking off sheets and cutting; coating parting agent on the inner wall of a metal mould, heating, drying, adding the cut mixture to the mould, sealing, heating for 20 minutes, cooling and demoulding. By adopting a nano-intercalation technology, the invention greatly improves the tensile modulus of the modified EVA microporous elastomer material on the premise of basically not decreasing the toughness.

The invention discloses a preparation method of a polymer modified graphene composite material. The preparation method includes the steps: firstly, preparing graphite oxide in an ultrasonic radiationreactor into modified graphene by modifiers; secondly, dispersing the modified graphene into polymer emulsion to prepare stable polymer/modified graphene composite emulsion; thirdly, adding emulsion breakers into the composite emulsion to obtain polymer/modified graphene composite master batches; finally, adding the master batches, polymers and various auxiliary materials into an extruder, meltingthe materials at a certain temperature and extruding the materials to obtain the polymer/modified graphene composite material. Performances such as the tensile strength and the tensile modulus of thecomposite material are good, the preparation method is simple in preparation process, low in reaction temperature, easy to control and low in energy consumption, waste gas and waste liquid are avoided in the production process, and the preparation method is environmentally friendly.

A tire cord (10) comprises a core (11) made of aramid fibers twisted together at a twist pitch (P1), and a sheath (12) composed of at least one strand (14) made of aramid fibers and wound around the core at a winding pitch (P2), wherein the winding pitch (P2) is less than the twist pitch (P1), and the total fineness (A) of the aramid fibers constituting the core (11) is less than the fineness (B) of the aramid fibers constituting each strand (14) of the sheath (12). A pneumatic tire (1) comprising a reinforcing layer, e.g. tread reinforcing layer made of the tire cords (10).

The invention discloses a three-layer concentric high-performance fiber composite material cable core rod and a manufacturing method thereof. The internal layer of the core rod is made of carbon fiber composite material, the intermediate layer is made of glass fiber composite material, and the external layer is made of aramid fiber composite material so that a concentric structure is formed by the three layers. The invention also discloses a manufacturing method of the core rod. Carbon fiber, glass fiber and aramid fiber are infiltrated in liquid resin in an open glue tank; carbon fiber composite material preformed core rod is firstly formed by the impregnated carbon fiber; the impregnated glass fiber evenly wraps the carbon fiber composite material preformed core rod so that a two-layer concentric structured carbon fiber/glass fiber composite material preformed core rod is formed; and aramid fiber through impregnation and online ultrasound processing evenly wraps the carbon fiber/glass fiber composite material preformed core rod so that a three-layer concentric structured carbon fiber/glass fiber/aramid fiber composite material core rod is obtained, and thus the core rod is enabled to possess the characteristics of high strength, high toughness, high insulation, low density and high tensile modulus.

The invention relates to a polylactic acid and styrene resin compatibilization blending material and a preparation method thereof. The blending material is formed by blending polylactic acid, styrene resin and a compatibilizer, and the compatibilizer is a copolymer obtained by conducting emulsion polymerization on styrene monomers and acrylate monomers according to the mass ratio of 100 to 20-40. The preparation method comprises the steps that emulsion polymerization is conducted on the styrene monomers and the acrylate monomers to obtain the compatibilizer, melt blending is conducted on the polylactic acid, the styrene resin and the compatibilizer, and then the polylactic acid and styrene resin compatibilization blending material is obtained. According to the polylactic acid and styrene resin compatibilization blending material, the tensile strength, the tensile modulus, the bending strength and the notch impact strength are improved, and the melt strength of the polylactic acid is improved; the reaction conditions are simple, the processing technology is easy to achieved, and the material cost and the technological cost of polylactic acid products are comprehensively reduced.

The invention discloses a plant fiber reinforced modified soy-based resin composite material and a preparation method thereof. Cross-linking agents and epoxidized soybean oil acrylate are blended to prepare soy-based resin, the soy-based resin is modified by modifiers to obtain modified soy-based resin, and plant fibers, the modified soy-based resin and initiators are hot-pressed to obtain the plant fiber reinforced modified soy-based resin composite material. The plant fiber reinforced modified soy-based resin composite material has excellent tensile strength, tensile modulus, bending strength, bending modulus and impact strength.

The invention discloses a high-adhesion silane-modified polyether sealant for a prefabricated building and a preparation method of the sealant. The method comprises the following steps: adding nano calcium carbonate, heavy calcium carbonate and amino-terminated polyether into a reaction kettle, blending for 1-2 hours in a vacuum condition, then adding a silane-modified polyether polymer, a coupling agent I, a thixotropic agent, an antiaging agent and a water-removing agent, and blending for 0.5-1 hour in the vacuum condition to obtain an ingredient A; adding epoxy resin, a flexible diluent, a coupling agent II and a catalyst into the reaction kettle, and blending for 1-2 hours in the vacuum condition to obtain a modified polyether sealant ingredient B for a base coat-free prefabricated building; and the ingredient A and the ingredient B are mixed in proportion to obtain the sealant.

The invention relates to furan dicarboxylic acid copolyester and a preparation method thereof. The preparation method comprises the following steps: mixing a first component, a second component and athird component with the mole ratio of 1 to (1.1 to 2.0) to (0.0001 to 0.02) with an esterification catalyst to obtain a first intermediate product, wherein the first component comprises at least oneof furan dicarboxylic acid and a furan dicarboxylic acid ester compound, the second component comprises at least one of aromatic diol and aliphatic diol, and the third component comprises polyhydric alcohol with hydroxyl number being greater than or equal to 3; performing prepolymerization reaction and polycondensation on the first intermediate product to obtain the furan dicarboxylic acid copolyester. In the preparation method, the polyhydric alcohol with hydroxyl number being greater than or equal to 3 serves as a connection point of chain segments, so that the chain segment structure of thefuran dicarboxylic acid copolyester is expanded to a network structure, thereby obtaining the colorless or lightcolor furan dicarboxylic acid copolyester with excellent mechanical property and air barrier property and high molecular weight.

The invention discloses a high glass fiber content enhanced high-temperature nylon composite material and a preparation method thereof. The high glass fiber content enhanced high-temperature nylon composite material is composed of five components by weight: 30-90 parts of high temperature nylon resin, 20-60 parts of chopped glass fiber, 1-10 parts of a flexibilizer, 0.1-1 part of an anti-oxidant and 0.2-2 parts of a lubricant, Compared with the commonly used glass fiber reinforcement high-temperature nylon composite material on market, the tensile strength, the tensile modulus, and the impactintensity of the high glass fiber content enhanced high-temperature nylon composite material are greatly increased.

The invention relates to furyl copolyester and a preparation method thereof. The preparation method comprises the following steps: mixing a first component, a second component and a third component with the mole ratio of 1 to (1.1 to 2.0) to (0.0001 to 0.02) with an esterification catalyst to obtain a first intermediate product, wherein the first component comprises at least one of furan dicarboxylic acid and a furan dicarboxylic acid ester compound, the second component comprises at least one of aromatic diol and aliphatic diol, and the third component comprises acid anhydride with carbonyl number being greater than or equal to 3; performing prepolymerization reaction and polycondensation on the first intermediate product to obtain furyl copolyester. In the preparation method, the acid anhydride with carbonyl number being greater than or equal to 3 serves as a connection point of chain segments, so that the chain segment structure of the furyl copolyester is expanded to a network structure, thereby obtaining the colorless or lightcolor furyl copolyester with excellent mechanical property and air barrier property and high molecular weight, and further meeting the application requirement of furyl copolyester in the fields of packing materials, thin films, fibers, engineering plastics and the like.

The purpose of the present invention is to provide a shape retaining film excellent in shape retention, and further having high tensile elasticity and good longitudinal tear resistance. The shape retaining film is composed of at least one base material layer containing an ethylene polymer that has the density of 900 kg/m³ or more, and the weight-average molecular weight (Mw)/number-average molecular weight (Mn) of 5 to 20, and at least one soft layer containing a high polymer material. The ethylene polymer is an ethylene homopolymer or an ethylene-α-olefin copolymer in which the content of a-olefin unit having 3 to 6 carbon atoms is less than 2% by weight, The high polymer material has the melting point (Tm2) lower than the melting point (Tm1) of the ethylene polymer, the tensile elasticity of 10 to 50 GPa, and the recovery angle of 65° or less as a result of 180° bending, test.

The invention relates to a hyperbranched polyester, particularly application of a hyperbranched polyester in PA6 (polyamide 6). The application comprises the following steps: (1) drying hydroxyl-terminated hyperbranched polyester; (2) drying pure PA6; (3) uniformly mixing the hydroxyl-terminated hyperbranched polyester obtained in the step (1) with the pure PA6 obtained in the step (2); and (4) granulating the uniformly mixed hydroxyl-terminated hyperbranched polyester and pure PA6 obtained in the step (3) by using a double screw extruder, and drying to obtain the modified PA6 product. The application can obviously lower the melt viscosity of PA6 and improve the physical properties.