288 results about "High performance polymer" patented technology

The invention relates to a process for preparing 4,4'-dichlorodiphenylsulfone, in particular to a process for preparing 4,4'-dichlorodiphenylsulfone employing a sulfoxide oxidation method. The process comprises the following steps: carrying out friedel-crafts reaction with chlorobenzene and thionyl chloride under the action of a catalyst to obtain the 4,4'-dichlorodiphenylsulfone; dissolving the obtained 4,4'-dichlorodiphenylsulfone with a solvent; adding hydrogen peroxide and carrying out oxidation reaction to obtain a 4,4'-dichlorodiphenylsulfone crude product; carrying out secondary oxidation refining on the obtained 4,4'-dichlorodiphenylsulfone crude product; and finally preparing high-purity 4,4'-dichlorodiphenylsulfone. The purity of the 4,4'-dichlorodiphenylsulfone purified by the refining process is greater than 99.5%; the refining yield is greater than 98.5%; and the process completely meets the synthesis requirements of high-performance polymers.

The present invention discloses a new type of high performance polymer membranes derived from aromatic polyimide membranes and methods for making and using these membranes. The polymer membranes described in the present invention were derived from aromatic polyimide membranes by crosslinking followed by thermal treating. The aromatic polyimide membranes were made from aromatic polyimide polymers comprising both pendent hydroxy functional groups ortho to the heterocyclic imide nitrogen and cross-linkable functional groups in the polymer backbone. The high performance polymer membranes showed significantly improved permeability for gas separations compared to the aromatic polyimide membranes without any treatment. The high performance polymer membranes also showed significantly improved selectivity for gas separations compared to the thermal-treated but non-UV-crosslinked aromatic polyimide membranes. The high performance polymer membranes of the present invention are suitable for liquid, gas, and vapor separations, as well as for catalysis and fuel cell applications.

The present invention belongs to the field of polymer material, and is especially the preparation process of poly(ether-ketone-ketone) prepared through polymerizing bisphenol and bifluoric monomer. The preparation process includes adding bis-(4-hydroxybenzoyl)-benzene, bis-1, 4-(4-fluorobenzoyl)-benzene or bis-1, 3-(4- fluorobenzoyl)-benzene, Na2CO3 as salt-forming agent and diphenyl sulfone as solid solvent into flask with mechanical stirrer, thermometer and nitrogen duct; introducing high purity nitrogen, heating to 100-130 deg.c and stirring to melting solid matter completely; heating slowly to react; pouring the reaction product into water to separating out white solid; crushing, washing with acetone and water for several times, drying at 80-150 deg.c for 10-20 hr to obtain polymer in the yield over 90 %.

The invention belongs to the field of shape memory functionalized application technology of high performance polymer matrix composite materials, and provides a thermotropic type shape memory composite material. The material comprises the following components: a shape memory polymer and carbon nanotube, wherein the content of the shape memory polymer is 15-85wt%, and the content of the carbon nanotube is 85-15wt%. The carbon nanotube has excellent mechanical properties, electrical property and thermal conductance performance; the carbon nanotube can be used as an enhancer of the polymer matrix composite material, and can be used as a heating element of the thermotropic type shape memory composite material. The thermotropic type shape memory composite material needs to be heated to a certain temperature in order to realize the function thereof, the carbon nanotube of the carbon nanotube enhanced polymer matrix shape memory composite material can be directly electrified for heating, so that dual functions for enhancing and heating the shape memory composite material are realized.

A prepared mold tool having a thermoplastic surface layer polymer coating on the mold surface of the mold tool or prepared prepreg having a thermoplastic surface layer polymer coating on the surface of the thermoplastic fiber reinforced prepreg are described that enhance first ply laydown of thermoplastic fiber reinforced composite prepregs onto mold tools for prepreg forming or in situ tape placement. Resulting thermoplastic fiber reinforced composite parts from a thermoplastic fiber reinforced thermoplastic composite material having structural reinforcement fibers with one or more high performance polymers, and a thermoplastic surface layer polymer coating which forms a polymer blend with the high performance polymers of the thermoplastic fiber reinforced composite material thereby imparting improved properties, and methods for making and using same, are provided herein.

A reinforced webbing material is disclosed for use in furniture, bedding and the like. The webbing includes a flat knitted fabric comprised of conventional yarns such as polyester. Elastomeric yarns or cords may also be, but are not necessarily, integrally knitted into the fabric structure in a warpwise direction. One or more high-performance polymeric reinforcement yarns are integrally knitted into the fabric structure in a lengthwise direction. The reinforcement yarns may comprise aramid fibers, ultra high molecular weight polyethylene, or other suitable high tensile strength polymeric yarns. The reinforcement yarns and elastomeric cords combine with the knitted fabric to provide a substantially elastic webbing material having a finite amount of stretch that is limited by the high performance yarns.

The invention discloses polymer emulsion and a preparation method thereof. The polymer emulsion is characterized by using hard monomer, soft monomer and crylic acid as polymer monomers, using crylic acid long-chain alkyl ester as modified monomer, using polymerizable organosilicon emulsifier PMSC as the emulsifier of the system and using thermal decomposition initiator as the initiator to obtain high-performance polymer emulsion by semi-continuous type emulsion copolymerization. The polymer emulsion obtained by the method has favorable waterproofness, water resistance, weather resistance, adhesiveness and film coating effect, and can be widely used as paint, adhesive, fabric waterproof agent, and the like, thereby having bright development potential.

The present invention discloses a bio-based unsaturated polyester cured product, which is prepared from the raw materials including by weight: 40-94% of epoxidized soybean oil acrylate, 4-59.5% of acrylpimaric dipropylene ester, and 0.5-2% of an initiator. The advantage that the hydrogen phenanthrene ring structure in acrylpimaric dipropylene ester has strong mechanical rigidity is fully played. The shortcomings that the epoxidized soybean oil acrylate molecular chain is too flexible and difficult to get high-performance polymer directly are overcome. The bio-based unsaturated polyester cured product with excellent performance and high bio-based components is prepared. The present invention also discloses a preparation method of the bio-based unsaturated polyester cured product. The method includes mixing the epoxidized soybean oil acrylate, the acrylpimaric dipropylene ester and the initiator, and removing into a mold. The bio-based unsaturated polyester cured product is obtained after copolymerization curing at 80-200 DEG C. The preparation conditions are easy to implement and control, and easy for mass industrial production.

The invention belongs to the field of polymer materials and relates to a low-smoke flame-retardant polymer composite material. The low-smoke flame-retardant polymer composite material is prepared from, by weight, 100 parts of a polymer matrix, 10-60 parts of an intumescent flame retardant, 0-30 parts of a charring agent, 0-20 parts of a foaming agent and 0.5-5 parts of a smoke inhibition synergist, wherein the smoke inhibition synergist is a hybrid formed by loading of metal ions on the surface of graphene oxide. The hybrid formed by loading of the metal ions on the surface of graphene oxide is used as the smoke inhibition synergist which is synergically used with the the intumescent flame retardant to improve flame retardation and smoke inhibition performances of various polymer materials such as epoxy resin and polyurethane. A new approach is provided for preparation of multifunctional high-performance polymer composite materials.

Materials based on low melt polyimide, polyurea, or polyurethane chemistry have been developed which exhibit self-healing properties. These high performance polymers can be utilized either by themselves or in combination with microcapsule technology to deliver self-healing properties to electrical wire insulation or in other high performance, thin wall technologies such as inflatable structures.

Toughened thermoplastic compositions comprising a thermoplastic polymer toughened by the inclusion of a thermoplastic elastomer derived from a particulate rubber dynamically vulcanized in the presence of a matrix polymer. The toughened thermoplastic composition exhibits properties including toughness, improved impact resistance, and improved hardness. The compositions are utilized wherever toughened, high performance polymers are desired. A method for forming the toughened polymer compositions is also described. Processing methods, such as rotational molding, utilizing the toughened polymer compositions are described.

A novel poly(arylene ether sulfone) having a sulfoalkoxy group, which has both of heat resistance and electroconductivity, is suitable as polymer electrolyte membranes used for high performance polymer electrolyte fuel cells, and does not use fluorine so that loads to the environment are small in the synthesis or disposal, a process of producing the same, and a polymer electrolyte membrane comprising the same. The poly(arylene ether sulfone) having a sulfoalkoxy group has a structural unit represented by the formula (1) mentioned hereinabove, and is produced by reacting a poly(arylene ether sulfone) having a hydroxyl group with a specific alkali metal compound and/or an organic base compound, followed by reacting with a specific sulfonating agent and then with a specific acid. A polymer electrolyte membrane is produced by film formation of the polymer.

Provided is a method of producing a polymeric fluorescent substance wherein one or more monomers represented by the general formula (1) are polymerized in the presence of a zerovalent nickel complex,

X₁—Ar₁—X₂  (1)

wherein, Ar₁ represents a divalent group selected from the group consisting of arylene groups, divalent heterocyclic compound groups, and divalent or trivalent hetero atom-bonded arylene or divalent heterocyclic compound groups, and X₁ and X₂ represent leaving groups. By using the polymeric fluorescent substance, a high performance polymer LED can easily be obtained.

In order to make available polymer compounds that are improved with respect to their properties compared to conventional PTFE, on the one hand, and the further high-performance polymer or polymers, on the other, it is proposed that a polymer compound has a proportion of a fully fluorinated thermoplastic polymer material as well as a proportion of at least one further high-performance polymer different therefrom, selected from the group of polyphenylene sulphide (PPS), polyphenylene sulphone (PPSO2), polyamide (PA), polyimide (PI), polyamide-imide (PAD, and polyether imide (PEI) as well as copolymers and derivatives of these polymers and copolymers, wherein the compound has a homogeneous distribution of the proportions of the polymers and the polymer material.

The invention provides a bionic porous artificial vertebral body preparation method based on 3D printing. The bionic porous artificial vertebral body preparation method comprises the following steps:1, constructing a spine finite element model; 2, performing a simulated biomechanical experiment on the constructed spine finite element model; 3, adjusting the size or position of the artificial vertebral body according to the stress distribution borne by the artificial vertebral body to obtain an artificial vertebral body model most conforming to spine biomechanics; and 4, printing the artificial vertebral body model designed in the step 3 by using a PEEK material by using a 3D printing technology, and printing the contact surfaces of the artificial vertebral body and upper and lower vertebral bodies into a porous structure beneficial to bone ingrowth. The stress distribution borne by the artificial vertebral body is analyzed, so that the artificial vertebral body meets the spine biomechanics requirement, and the fusion, reliability and stability of use are guaranteed; 3D printing is carried out by adopting a high-performance polymer material polyether-ether-ketone (PEEK), so that the biomechanical matching performance is good, no interference is caused to imaging examination, personalized customization is realized, and the biomechanical requirements are met.

The invention discloses one-step method high-temperature and high-pressure melt spinning equipment and a production method of a polymer fiber and relates to the one-step method high-temperature and high-pressure melt spinning equipment. The spinning equipment is characterized by comprising a driving device, an extruder system and a spinning device, wherein the driving device comprises a driving motor and a speed reducing device; the extruder system comprises an extruder screw, a charging barrel, a loading hopper, an electric heater and an extruder head; the loading hopper and the electric heater are arranged on the charging barrel of an extruder; one end of the extruder screw is connected with the driving motor through the speed reducing device; the other end of the extruder screw is matched with the extruder head. The spinning equipment also comprises a melt filtering device, a metering pump, a spinning box body and a spinning component. The spinning device sequentially comprises the metering pump, the spinning box body, the spinning component, a spinneret plate, a coldness alleviating deice, a multifilament bundling device, an oiling device, a guide device, a hot roller drafting sizing device and a winding device. The high-temperature and high-pressure melt spinning equipment is special for melt spinning of polymers with high melting point, high melt viscosity and high performance, such as polyether-ether-ketone, polyaryletherketone and polyetherimide.

Provided are nonwoven polymeric fiber webs using an improved curable composition. Such curable composition comprises a reaction product of an amine and a reactant in the form of an amino-amide intermediate. To the amino-amide is added an aldehyde or ketone to form the curable binder composition. The composition when applied to the polymeric fibers is cured to form a water-insoluble polymer binder which exhibits good adhesion and thermo-dimensional stability.

Methods that expand the properties of laser-induced graphene (LIG) and the resulting LIG having the expanded properties. Methods of fabricating laser-induced graphene from materials, which range from natural, renewable precursors (such as cloth or paper) to high performance polymers (like Kevlar). With multiple lasing, however, highly conductive PEI-based LIG could be obtained using both multiple pass and defocus methods. The resulting laser-induced graphene can be used, inter alia, in electronic devices, as antifouling surfaces, in water treatment technology, in membranes, and in electronics on paper and food Such methods include fabrication of LIG in controlled atmospheres, such that, for example, superhydrophobic and superhydrophilic LIG surfaces can be obtained. Such methods further include fabricating laser-induced graphene by multiple lasing of carbon precursors. Such methods further include direct 3D printing of graphene materials from carbon precurors. Application of such LIG include oil/water separation, liquid or gas separations using polymer membranes, anti-icing, microsupercapacitors, supercapacitors, water splitting catalysts, sensors, and flexible electronics.

The invention discloses applications of amine compounds in dispersing of fluorocarbon materials, and a method used for dispersing the fluorocarbon materials. Electrophilic-nucleophilic interaction between the fluorocarbon materials and the amine compounds is similar to chemical bonding, so that the fluorocarbon materials can be dissolved in amine compound mediums, and other organic mediums, or water so as to obtain steadily dispersed fluorocarbon materials which can be used as lubricating oil additives or high-performance polymer composite materials effectively.