409 results about "Polymer science" patented technology

Low viscosity biodegradable polymer solutions of a liquid biodegradable polymer and biocompatible solvent and methods of using the compositions to form a liquid polymer implant are provided.

The invention relates to polyester conductive fibers and provides graphene conductive polyester fibers having good conductivity and lasting static resistance and a preparation method thereof. Through surface sulfonic acid group functionalization of graphene, graphene particles have sizes less than 1 micrometer and have good dispersibility, graphene, carbon nanotubes and a surfactant are stirred and mixed according to a mass ratio of 1-5: 1-5: 1-5: 1 and then are dispersed to form conducting particles, the conducting particles are added into polyester powder, the mixture is processed to form graphene superconducting masterbatches by a twin-screw granulation technology, and the graphene conductive polyester fibers are prepared by a spinning technology adopting a double-component composite spinning method or a single-component blending spinning method. The graphene conductive polyester fibers have the characteristics of simple production processes, low energy consumption, low labor and mass production feasibility.

The invention discloses a phase change energy storage thermoplastic composite material, which comprises the following components in percentage by weight: 5 to 30 percent of polypropylene, 10 to 40 percent of ethylene-propylene-diene monomer (EPDM), 20 to 75 percent of paraffin, 0.5 to 10 percent of cross-linking agent, 0.01 to 2 percent of antioxidant, 0.01 to 10 percent of processing aid and 0 to 10 percent of crosslinking aid. The components are subjected to dynamic vulcanization in one step in melting mixing equipment to obtain the phase change energy storage thermoplastic composite material. The phase change energy storage thermoplastic composite material has the processing characteristics of thermoplastic plastics, and has high breaking elongation, moderate hardness and flexibility; and the paraffin is coated in the crosslinked EPDM to form microcapsules, and the phase change energy storage thermoplastic composite material is excellent in shape retaining performance and low in percolation ratio and has the better application prospects in fields of construction, chemical engineering, energy and the like.

The invention discloses an industrially-applicable method for preparing a polymer foamed material by using supercritical fluid technology, which comprises the following steps: 1) forming a polymer raw material to be foamed into raw blanks by melting, blending and cooling; 2) placing the raw blanks in a container, charging supercritical fluid into the container, and allowing the raw blanks to swell and the supercritical fluid to permeate into the raw blanks; and 3) initiating nucleation and foaming by controlling pressure relief rate and obtaining the closed micro pore polymer foamed material with uniform pore diameter and adjustable pore density. According to the invention, the process is simple, the production process is clean and environment-friendly, the efficiency is high, and the prepared foamed material has high mechanical performance and can be used in fields of transportation vehicles, building materials, packages and the like.

Superabsorbent polymer particles having a reduced amount of fine-sized particles and methods of producing the superabsorbent polymer particles are disclosed.

The invention discloses a use of polysiloxane with modified acrylate radicals. The polysiloxane serves as dirt-proof coating additive. The structure of the polysiloxane with modified acrylate radicals is shown as the formula I, and definitions of R1, R2, a and R3 are described as an instruction book and claims. A dirt-proof coating composition of the polysiloxane with modified acrylate radicals, oligomer containing at least one unsaturated double bond, diluent monomer and light initiator is further disclosed, and the dirt-proof coating composition has good dirt-proof performance.

The invention provides an asphalt modified thermoplastic polyolefin water-proof coiled material and a preparation method thereof; the coiled material is characterized by consisting of an upper surface layer, a main body layer and a reinforcing layer; the upper surface layer is made from white or colored thermoplastic polyolefin with excellent ultraviolet radiation resistance, the main body layer is made from black asphalt modified thermoplastic polyolefin, and the reinforcing layer consists of a middle reinforcing layer and a surface lining layer which are arranged as required. The asphalt modified thermoplastic polyolefin water-proof coiled material has the advantages of good processing property, excellent mechanical property, high tension strength, good dimensional stability, strong puncture resistance, good ultraviolet radiation resistance, small specific gravity, capacity of realizing convenient seam suturing welding of the main body and recoverable tailing and excessive materials, and the like.

The invention discloses a method of amphipathy fluorinated multipolymer modifying the surface of tetrafluoroethylene blownfilm. The fluorinated multipolymer is achieved by aggregating of fluorinated (methyl) ACR monomer A and (methyl) ACR monomer B. The preparing and modifying tetrafluoroethylene blownfilm is that: firstly, aggregate the fluorinated (methyl) ACR monomer A and (methyl) ACR monomer B to achieve amphipathy fluorinated random or amphiphilic block or triblock copolymer; then compound the copolymer with the tetrafluoroethylene blownfilm by the way of coating, to prepare hydrophile tetrafluoroethylene blownfilm which can achieve by stretching in one-way or two-way. The prepared hydrophile tetrafluoroethylene blownfilm not only has the characters of age resistant, resistant to chemical attack and wide applicable temperature, but also has good hydrophilicity, large water flux. The method can be suitable for the surface modifying of tabular, tubular and hollow fiber tetrafluoroethylene blownfilm.

The invention belongs to the technical field of intelligent high-molecular materials, and relates to a preparation method and an application of a high-strength oriented polyvinyl alcohol hydrogel. Thepreparation method of the high-strength oriented polyvinyl alcohol hydrogel comprises the following steps: adding deionized water to dissolve polyvinyl alcohol powder, carrying out freeze-thawing circulation, pre-stretching orientation and freeze drying to obtain a polyvinyl alcohol aerogel, and immersing the obtained polyvinyl alcohol aerogel in an aqueous solution of a salt having a Hofmann effect or an aqueous solution of a salt capable of forming a coordinate bond or an aqueous solution of a polycarboxy compound capable of forming a hydrogen bond with polyvinyl alcohol to prepare the high-strength oriented polyvinyl alcohol hydrogel. The high-strength oriented polyvinyl alcohol hydrogel has a tensile strength reaching up to 41.0 MPa, an elongation at break reaching up to 228.0% and atoughness reaching up to 49.94 MJ/m<3>, also has antibacterial and anticorrosive effects and a free radical scavenging effect, and is of great significance to broaden the application of the polyvinylalcohol hydrogel in artificial muscles and cartilages, tissue engineering and other biomedical materials.

The invention provides a rubber composite used for rubber framework oil seal and a preparation method thereof. The rubber composite contains(based on weight portions) 100 portions of fluorubber26, 5-6 portions of acid absorber magnesia, 5-6 portions of calcium hydroxide, 9-1 portions of strengthening agent black carbon, 19-20 portions of barium sulphate, 17-19 portions of iron oxide red, 2-3 portions of process additive, 1.5-2 portions of curing ingredient bisphenol AF, and 0.6-0.8 portions of accelerant BPP. The rubber composite improves the tension strength, extensibility, tear resistance, self-lubricating effect, compressive deformation resistance and thermal aging resistance of the rubber framework, makes the rubber framework good in medium resistance and prolongs the service life of the rubber framework oil seal. Meanwhile, the method is simple in process, reasonable in mixture ratio and reduces preparation cost and defective index.

It is an object of the present invention to provide a tire rubber composition excellent in performances such as silica dispersibility and processability. The present invention relates to a tire rubber composition, comprising: a rubber component; silica; and a silane coupling agent, wherein the silica has a CTAB specific surface area of 180 m²/g or more and a BET specific surface area of 185 m²/g or more, and the silane coupling agent is a copolymer comprising units A represented by formula (1) and units B represented by formula (2), and the proportion of the units B is 1 to 70 mol % of the total molar amount of the units A and the units B.

The invention discloses spherical polybutylene-1 with high isotacticity and a preparation method thereof as well as a catalyst used by the method. The method comprises the following steps: catalyzing the polymerization of a butene-1 monomer body to polymerize by using a loaded ziegler-giulio natta spherical catalyst system, wherein hydrogen is a molecular weight adjustor; adding an electron donor compound; implementing temperature-gradient polymerization in a temperature range from -10 DEG C to 50 DEG C, wherein polybutylene-1 suspends in the reaction system in form of spherical particles; and flashing to recover unpolymerized monomers to obtain spherical polybutylene-1. Spherical polybutylene-1 with high isotacticity can be obtained by adjusting the partial pressures of the electron donor and hydrogen, wherein the isotacticity is greater than 95%, the isotacticity is greater than 0.30g/cm<3> and the isotacticity is 0.1-30g/10min. The catalyst used in the method consists of a carrier, an active component, the electron donor and a promoter.

An inkjet recording ink set, which contains at least: a black pigment ink; and a color pigment ink, wherein the black pigment ink contains a black pigment treated with an anionic surfactant, and a black pigment coated with a resinous polymer, and water, and the black pigment ink is a pigment dispersion liquid where the black pigment treated with the anionic surfactant and the black pigment coated with the resinous polymer are dispersed in the water, and wherein the color pigment ink contains a color pigment, a nonionic surfactant, and water, and the color pigment ink is a pigment dispersion liquid where the color pigment is dispersed in the water with assistance of the nonionic surfactant.

The invention discloses a preparation method and application of a water-soluble carbon fiber sizing agent. The water-soluble carbon fiber sizing agent contains 3-30 parts of water-soluble polymer, 0.04-1 part of adhesive, 0.1-2 parts of emulsifier and 60-97 parts of solvent, wherein the water-soluble polymer refers to a molecule containing a great quantity of one or several of hydroxyl, amino, acylamino and carboxylic acid. The preparation method comprises the following steps: at 60-100 DEG C, adding the water-soluble polymer into the solvent to be completely dissolved, and after the temperature is moderate, adding the adhesive and the emulsifier into the solution, and stirring for dissolution to prepare an integrated solution, thus obtaining the water-soluble carbon fiber sizing agent. Materials adopted by the invention are all non-toxic; after the carbon fiber is treated by using the water-soluble carbon fiber sizing agent, the surface of the carbon fiber contains a large quantity of active functional group, so that the surface hydrophilicity and dispersibility of the carbon fiber are greatly improved, good softness and flexibility of the carbon fiber are guaranteed, and the carbon fiber can be better applied to water treatment and other aspects having requirement for good dispersibility of the carbon fiber.

The invention relates to a high-strength and high-modulus polyvinyl alcohol fiber and a melt spinning method of the high-strength and high-modulus polyvinyl alcohol fiber. The method comprises the following steps that polyvinyl alcohol, water and polyatomic alcohol are subjected to full swelling after being uniformly mixed; the polyvinyl alcohol subjected to the full swelling is added into a double-screw-rod extruding machine and is then subjected to full fusion to be extruded, and melt fine flows form a primary fiber after air blowing cooling; and the prepared primary fiber is subjected to the drying by a hot air drying oven, multistage stretching and tense heat setting to form the polyvinyl alcohol fiber. The preparation method of the prepared polyvinyl alcohol fiber has the advantage that through the hydrogen bond compounding among water molecules, polyatomic alcohol and polyvinyl alcohol molecules, the melt spinning and the high-power stretching of the polyvinyl alcohol are realized. The polyvinyl alcohol fiber prepared by the preparation method has the advantages of fiber degree controllability, high strength and high modulus, and can be widely applied to the field of civil engineering concrete.

Sulfonated aromatic copolyesters and articles made therefrom, and processes for producing the sulfonated aromatic copolyesters and articles are provided. Articles that can be made from the sulfonated aromatic copolyesters include films, coatings and laminates. Some of the compositions and articles are biocompostable. The films can further be used to form shaped articles such as sheets, food packaging such as sandwich wraps, thermoformed containers, and coatings for, for example, films and other substrates. The sulfonated aromatic copolyesters contain a hydroxyalkanoic acid component.

Provided is a shaped article for clean rooms comprising a resin composition prepared by melt-kneading 100 parts by weight of a cyclic olefin polymer (A) having a glass transition temperature of from 60 to 200° C., from 1 to 150 parts by weight of a flexible copolymer (B) prepared by polymerizing at least two monomers selected from a group consisting of olefins, dienes and aromatic vinyl-hydrocarbons, and having a glass transition temperature of 0° C. or lower, from 0.001 to 1 part by weight of a radical initiator (C), and from 0 to 1 part by weight of a polyfunctional compound (D) having at least two radical-polymerizable functional groups in the molecule. The shaped article for clean rooms has good chemical resistance, heat resistance and dimensional accuracy, it is inhibited from releasing a volatile component around it, and it has good abrasion resistance and is inhibited from producing particles.

The invention provides a composite silicon-based flame-retardant viscose fiber and a production method thereof, which belong to the field of viscose fibers. The composite silicon-based flame-retardant viscose fiber provided by the invention consists of the following components in part by weight: 13 to 28 parts of linear silicon-based flame retardant, 3 to 12 parts of auxiliary flame retardant, 2 to 8 parts of silane coupling agent and 52 to 82 parts of raw viscose. The composite silicon-based flame-retardant viscose fiber is obtained by preparing a composite silicon-based flame retardant solution and an auxiliary flame retardant solution, blending the composite silicon-based flame retardant solution, the auxiliary flame retardant solution and the raw viscose and performing conventional spinning, post-treatment, drying and packaging. By the composite silicon-based flame-retardant viscose fiber, the mechanical properties, heat resistance and flame retardance of a flame-retardant viscose fiber are improved; and by the preparation method, the problem of spinnability of the flame-retardant viscose fiber is solved.