36 results about "Polyetherketoneketone" patented technology

The synthesis process comprises the following steps: (1) introducing inert gas into a reactor, adding a solvent, a Lewis acid catalyst and diphenyl ether, then dropwise adding an acyl chloride monomer solution, and synthesizing an intermediate M with a short-chain small molecular structure; (2) continuously dropwise adding an acyl chloride monomer solution into the reactor for reaction, and then adding an end-capping reagent for reaction; and (3) quenching, washing and drying the reaction product in the step (2) to obtain the product. Under the condition that only the Lewis acid is used as the catalyst, the one-pot method is adopted for synthesizing PEKK in two steps, side reactions can be reduced, meanwhile, the dosage of the catalyst is reduced, the production cost is reduced, the post-treatment process is simplified, and the obtained polyether ketone ketone is high in molecular weight and good in heat resistance and mechanical performance.

The application discloses a kind of electrospinning preparation methods of superfine, no adhesion polyether ketone ketone nanofiber membrane: polyether ketone ketone is dissolved in solvent to obtain polyether ketone ketone spinning solution;Polyether ketone ketone spinning solution is loaded in the injector of electrospinning device, and spinning is carried out;The concentration of ethanol or water in spinning environment is improved using solvent atomization between injector needle and collecting device, and polyether ketone ketone jet phase separation is accelerated;The nascent polyether ketone ketone nanofiber is collected into membrane;The fiber membrane collected is soaked in coagulation liquid to make solvent remaining in fiber precipitate, after taking out, dry, obtain polyether ketone ketone nanofiber membrane.The application realizes low concentration electrospinning using the unique interchain topological entanglement of polyether ketone ketone, and promotes phase separation by introducing solvent atomization between spinneret and collecting device, overcome the problem that other polymers are difficult to obtain continuous fiber and fiber is easy to adhere in low concentration electrospinning, and prepare superfine, no adhesion polyether ketone ketone nanofiber membrane.

The invention discloses a preparation method of polyetherketoneketone, polyetherketoneketone and application. The method comprises the following steps: (1) mixing raw materials at a first temperature, the raw materials comprising acyl chloride, a solvent, Lewis base, diphenyl ether and Lewis acid, carrying out heat preservation, heating to a second temperature, and carrying out a first reaction stage; (2) heating to a third temperature for reaction, and carrying out a second reaction stage; (3) adding a terminator into the reaction mixture in the step (2); the heating rate in the step (1) and the heating rate in the step (2) are respectively and independently 0.1-5 DEG C / min, the weight-average molecular weight of the polyetherketoneketone prepared by the method is 5000-200000, and the molecular weight distribution coefficient is 2.5-4.5. The polyetherketoneketone with relatively narrow molecular weight distribution is obtained through an electrophilic substitution path.

The invention discloses a polyetherketoneketone fiber anti-adhesion porous spinning method. The method comprises the following steps: dissolving polyetherketoneketone to obtain a spinning solution, and extruding the spinning solution through a porous spinneret plate to form a plurality of spinning trickles; the trickles enter a first coagulating bath to be preliminarily coagulated and formed, and fibers are obtained; dividing the fibers by a split type dividing plate, guiding the fibers into a second coagulating bath by a godet, washing with water, applying oil, and then drying; fibers enter the hot drafting device to be subjected to multi-stage hot drafting, and after heat setting, the fibers are tidied and wound by the buncher. The first coagulating bath is provided with a bath lotion supplementing unit, a circulating filtering system and an ultrasonic generator which are combined to quickly and uniformly update components of the coagulating bath; and the split type filament separating plate keeps a distance between fibers, prevents mutual adhesion and improves the double-diffusion efficiency in the second coagulating bath. The ultrasonic-assisted circulating filtration system is used for updating the synergistic effect of the coagulating bath and the split type filament separating plate, so that the problems that fibers are easy to adhere and are uneven in evenness and performance are effectively solved.

The invention relates to an assembly comprising a first part and a second part, each part comprising a polymer; and a film located between and adhered to the first part and the second part. The film comprises a blend of at least two poly(ether ketone ketone) (PEKK) polymers and optionally at least one nucleating agent. The assembly has improved fracture toughness and overall good mechanical properties.

Polyaryletherketone aerogels. In particular, a method of making polyaryletherketone aerogels using environmentally benign solvents for gel formation. In addition, a method is provided for 3D printing of such polyaryletherketone aerogels. The polyaryletherketone aerogels may specifically be sourced from poly(ether ether ketone) (PEEK) or poly(ether ketone ketone) (PEKK).

The invention relates to a composition comprising: a poly(ether ketone ketone), PEKK1; a thermoplastic polyimide having a glass transition temperature greater than or equal to 230°C, TPI; and optionally, a poly(aryl ether ketone), PAEK, PAEK being distinct from PEKK1. PEKK1 represents at least 50% by weight, relative to the total weight of PEKK1, TPI and, where applicable, PAEK, of the composition. PAEK is necessarily present when the TPI content is greater than or equal to 20% by weight, and preferably when the TPI content is greater than or equal to 15% by weight, relative to the total weight of PEKK1 and TPI of the composition.

The invention discloses a visual all-polymer prepared chromatographic column and a prepared chromatographic purification method thereof. The visual all-polymer prepared chromatographic column comprises a column tube made of a transparent amorphous polyether ketone ketone material and end covers connected to the two ends of the column tube, a multi-stage sealing structure is arranged between the end cover and the column tube, so that the column tube forms a continuous visual window for observing the separation process in the column in real time; the multistage sealing structure comprises at least one radial sealing ring arranged between the end cover and the inner wall of the column pipe, a buffer gasket arranged between the end face of the end cover and the end face of the column pipe, and a locking hoop used for providing axial pressing force for the radial sealing ring and the buffer gasket. The column tube provided by the invention is fully transparent, allows real-time visual observation, has high-pressure sealing reliability, high chemical inertness and good mechanical strength, and can improve the preparation and purification efficiency, intuition and reliability.

The invention relates to the field of macromolecules, and discloses a method for refining polyetherketoneketone and a polyetherketoneketone refined product. The method comprises the following steps: (1) treating a polyetherketoneketone complex by adopting a pretreatment agent; (2) the polyether ketone ketone crude product and a mixed chain supporting solution are mixed and washed, a first product is obtained, the mixed chain supporting solution comprises a main chain supporting agent and a cosolvent, the main chain supporting agent comprises one or more selected from parachlorophenol, trifluoroacetic acid, difluoroacetic acid, dichloroacetic acid and chloroacetic acid, the cosolvent comprises one or more selected from N, N-dimethylformamide and dimethyl sulfoxide, and the main chain supporting agent comprises one or more selected from dichlorophenol, trifluoroacetic acid, difluoroacetic acid, dichloroacetic acid and chloroacetic acid. The solvent is one or more of water, N-methyl pyrrolidone and N-methyl formamide; (3) adding a mixed aqueous solution into the first product to remove at least part of metal ions to obtain a second product; and (4) washing the second product for multiple times by using an organic solvent, and washing and drying to obtain the refined polyether ketone ketone. The content of aluminum ions in the polyetherketoneketone prepared by the method is low.

The application discloses a kind of polyether ketone ketone and preparation method thereof, the application is first added terephthaloyl chloride or isophthaloyl chloride and diphenyl ether, then under the condition of adding catalyst anhydrous aluminium chloride, low-temperature prepolymerization for a certain time, then the remaining diphenyl ether is added to complete the short-chain end-capping reaction.The application reduces the temperature in the early stage of the starting reaction process and adopts the reflux method in the selection of the washing reagent in the later stage, so that the purity and molecular weight of the obtained high molecular polymer polyether ketone ketone are high.The content of aluminum, a catalyst contained in PEKK, is lower, and the intrinsic viscosity (molecular weight) and tensile strength of the tested product are higher.

The invention relates to the technical field of multi-thread screw extrusion, in particular to a multi-thread screw extrusion system of a polyetherketoneketone composite material and a use method of the polyetherketoneketone composite material, the multi-thread screw extrusion system comprises a double-screw extruder feed hopper used for feeding the polyetherketoneketone composite material, and the double-screw extruder feed hopper comprises a hopper body; a supporting hole for mounting a connecting pipeline is formed in the hopper body; a mixing assembly is installed in the middle of the upper end of a feeding hopper of the double-screw extruder, and four sets of batching pipelines with the adjacent included angles being 90 degrees are installed on the periphery of the upper end of the mixing assembly. Various materials can be preliminarily mixed before entering the double-screw extruder, so that the mixing uniformity degree in the material processing process is improved, and the mixing efficiency is improved; and meanwhile, in the process that the materials enter the material mixing assembly, collision can occur, dust on the surfaces of the materials can be raised conveniently, the dust can be treated in time in cooperation with the arranged dust removal assembly, and the production quality is effectively improved.

The invention discloses a production method and application of polyetherketoneketone, and relates to the technical field of polymer synthesis. The production method of the polyetherketoneketone comprises the following steps: a method I: in an inert atmosphere, carrying out polymerization reaction on acyl chloride and diphenyl ether in the presence of Lewis base, Lewis acid and a reaction solvent for a period of time, adding a fluorine-containing end-capping reagent, and continuously reacting for 2-5 hours to obtain end-capped polyetherketoneketone; or the method II comprises the following steps: in an inert atmosphere, carrying out polymerization reaction on acyl chloride, diphenyl ether and a fluorine-containing end-capping reagent in the presence of Lewis base, Lewis acid and a reaction solvent to obtain the end-capped polyether ketone ketone. The fluorine-containing end-capping reagent is adopted for end capping of PEKK, so that the molecular weight and molecular weight distribution of PEKK are effectively controlled, the thermal stability and chemical inertness of the end group of PEKK are remarkably enhanced, and the hydrophobicity of PEKK is improved.

The invention discloses a method for preparing polyetherketoneketone and polyetherketoneketone prepared through the polyetherketoneketone, and the method comprises the steps that 1, a first part of raw materials, diphenyl ether and a solvent are added into a reaction container, and the first part of raw materials comprise part of lewis acid and part of lewis base; (2) adding a first acyl chloride solution at a first dropwise adding rate; (3) after heating, adding a second part of raw materials, and dropwise adding a second acyl chloride solution at a second dropwise adding rate, the second part of raw materials comprising the rest Lewis acid and Lewis base, and the molar ratio of the Lewis acid and Lewis base in the first part of raw materials to the Lewis acid and Lewis base in the second part of raw materials is (5-9): (5-1); the mass ratio of acyl chloride in the first acyl chloride solution to acyl chloride in the second acyl chloride solution is (5-9): (5-1), and the first dropwise adding rate and the second dropwise adding rate are 2.2% vol / min-6. 6% vol / min. The polyetherketoneketone prepared by the method is narrow in molecular weight distribution.

The application discloses a method for preparing polyether ketone ketone and polyether ketone ketone prepared by the method, and the method comprises the following steps: (1) adding a first part of raw materials and diphenyl ether and a solvent into a reaction container, wherein the first part of raw materials comprises part of a Lewis acid and part of a Lewis base; (2) adding a first acyl chloride solution at a first dropping speed; (3) after temperature rising, adding a second part of raw materials and adding a second acyl chloride solution at a second dropping speed, wherein the second part of raw materials comprises the remaining Lewis acid and Lewis base, the molar ratio of the Lewis acid and the Lewis base in the first part of raw materials to the Lewis acid and the Lewis base in the second part of raw materials is (5-9):(5-1), the mass ratio of acyl chloride in the first acyl chloride solution to acyl chloride in the second acyl chloride solution is (5-9):(5-1), and the first and second dropping speeds are 2.2%vol / min-6.6%vol / min. The polyether ketone ketone prepared by the method has a narrow molecular weight distribution.

The invention discloses a preparation method of a 1, 4-bis (4-phenoxy benzoyl) benzene-AlCl3 complex, and belongs to the technical field of polymer monomer preparation, aromatic diacyl chloride and aromatic ether are used as raw materials, a crude product of the 1, 4-bis (4-phenoxy benzoyl) benzene-AlCl3 complex is continuously synthesized under the catalysis condition of a Lewis acid catalyst, and the crude product of the 1, 4-bis (4-phenoxy benzoyl) benzene-AlCl3 complex is subjected to post-treatment to obtain the 1, 4-bis (4-phenoxy benzoyl) benzene-AlCl3 complex. The high-purity 1, 4-bis (4-phenoxy benzoyl) benzene-AlCl3 complex can be used as a polyether ketone ketone active monomer, and the effect of the active monomer can be exerted without adding aluminum in the polymerization reaction process.

The application discloses a method for improving the hydrophilicity of a PEKK chromatographic column screen plate by surface treatment and a modified screen plate thereof, relates to the technical field of PEKK chromatographic column screen plates, and comprises a screen plate, wherein the base material of the screen plate is polyether ketone ketone (PEKK) containing a diketone group (-CO-CO-) in the molecular structure. The application realizes efficient and directional surface modification by precisely utilizing the unique diketone group of PEKK as an advantageous modification site through a series of structures. The strong anchoring effect of the diketone group makes the formed hydrophilic layer combined with the base material exceptionally firmly, and significantly improves the durability of the coating. Compared with a traditional PEEK screen plate, the product can effectively inhibit bubble generation and retention in a high-aqueous-phase mobile phase, thereby ensuring stable system pressure and obtaining a smooth baseline, and finally greatly improving the reproducibility, sensitivity and column efficiency of chromatographic analysis.

The present invention relates to blends of poly(ether ketone ketone) (PEKK) polymers, in particular to certain blends endowed with lower melting point than traditional PEKK polymers, yet maintaining high crystallinity and rapid crystallization behaviour, which are composed of a major amount of a first nucleophilic PEKK having a first T / I ratio, and a minor amount of a second PEKK having a second T / I ratio higher than the first T / I ratio; to methods of making the same, and to uses thereof in various fields.

The application discloses a production method of polyether ketone ketone and application thereof, and relates to the technical field of polymer synthesis. The production method of the polyether ketone ketone comprises the following steps: method one: in an inert atmosphere, acyl chloride and diphenyl ether are subjected to polymerization reaction for a period of time in the presence of a Lewis base, a Lewis acid and a reaction solvent, then a fluorine-containing end-capping agent is added and the reaction is continued for 2-5 hours to obtain an end-capped polyether ketone ketone; or method two: in an inert atmosphere, acyl chloride, diphenyl ether and the fluorine-containing end-capping agent are subjected to polymerization reaction in the presence of the Lewis base, the Lewis acid and the reaction solvent to obtain the end-capped polyether ketone ketone. The fluorine-containing end-capping agent is used to end-cap the PEKK, the molecular weight and the molecular weight distribution of the PEKK are effectively controlled, the thermal stability and the chemical inertness of end groups of the PEKK are significantly enhanced, and the hydrophobicity of the PEKK is improved.

The utility model relates to the technical field of processing equipment, and discloses a feeding device for wet processing of polyetherketoneketone composite powder, which comprises a wet processing box and a feeding port, the feeding port is arranged on the inner wall of the top of the wet processing box, a feeding mechanism is arranged on the wet processing box, an auxiliary mechanism is arranged on the feeding mechanism, and the auxiliary mechanism is arranged on the feeding mechanism. The feeding mechanism comprises an annular groove, the annular groove is formed in the inner wall of the top of the wet processing box, a discharging port is formed in the inner wall of the top of the annular groove, a shaft sleeve plate is clamped to the outer wall of the top of the wet processing box, an inner ring of the shaft sleeve plate is rotationally connected with a preset cylinder through a bearing, and a graduated scale is fixedly connected to the outer wall of the front side of the preset cylinder. And the inner wall of the top of the preset cylinder is slidably connected with a piston plate. According to the utility model, the shaft sleeve plate, the preset cylinder and other structures are arranged, so that the problems that when fillers such as solid and solid-liquid mixture enter among different processes, solvents are easy to volatilize or toxic substances are easy to diffuse, the mixing ratio dosage is inconvenient to control in advance, and processed composite materials are easy to have different quality levels are solved.

The invention relates to the technical field of polyether ketone ketone materials, and provides PEKK spherical powder prepared through ultrasonic-assisted TIPS and a preparation method and device of the PEKK spherical powder. The method comprises the steps that an organic solvent serves as a solvent, and a homogeneous solution containing polyether ketone ketone is obtained; and cooling the homogeneous solution to a liquid-liquid phase separation temperature interval of the polyetherketoneketone-solvent system at a cooling rate of 0.1-5 DEG C / min under the action of ultrasonic waves. Through the cavitation effect and the mechanical effect of ultrasonic waves, the nucleation and growth process of PEKK is effectively regulated and controlled, an effective quenching temperature window is widened, and then powder with high sphericity and narrow particle size distribution can be obtained more controllably. Furthermore, by optimizing ultrasonic parameters and cooling process parameters, the sphericity, particle size distribution uniformity and fluidity of the powder are remarkably improved, and the problems that the PEKK powder prepared through a traditional TIPS method is irregular in morphology and wide in particle size distribution are solved.

The invention relates to a composition comprising: a poly(ether ketone), PEKK1; a thermoplastic polyimide having a glass transition temperature greater than or equal to 230 °C, TPI; and optionally, a poly(aryl ether ketone), PAEK, PAEK being distinct from PEKK1. PEKK1 represents at least 50% by weight, relative to the total weight of PEKK1, TPI, and, where applicable, PAEK, of the composition. PAEK is necessarily present when the TPI content is greater than or equal to 20% by weight, and preferably when the TPI content is greater than or equal to 15% by weight, relative to the total weight of PEKK1 and TPI of the composition.

The spring energy storage type spring plug seal comprises a metal spring and polymer sealing lip sleeves arranged at the two ends of the metal spring in a sleeving mode, the sealing lip sleeves are made of amorphous polyether ketone ketone materials, the elongation at break of the amorphous polyether ketone ketone materials is larger than 80%, the forming shrinkage rate is smaller than 0.005%, and the sealing lip sleeves are made of polymer materials. The sealing lip sleeve is provided with an ultrathin and sharp sealing cutting edge with the thickness ranging from 0.15 mm to 0.35 mm. According to the invention, the traditional idea of crystallization control is completely abandoned, and the amorphous PEKK material without crystallization behavior is adopted, so that the problems of crystallization shrinkage and anisotropy are fundamentally eliminated, and meanwhile, the unexpected high toughness and dimensional stability are obtained.

The invention discloses a preparation method of a silicon dioxide / polyetherketoneketone composite film, which comprises the following steps: adding tetraethyl silicate and deionized water into a polyetherketoneketone solution, carrying out hydrolysis reaction on the tetraethyl silicate, and generating nano silicon dioxide particles in situ in a polyetherketoneketone matrix to form a silicon dioxide / polyetherketoneketone composite solution; spreading and preforming the solution into a wet film through heating constant-temperature treatment, and then putting the wet film into a coagulating bath to separate out a residual solvent in the film; and thoroughly drying to remove the residual solvent. According to the invention, the problems of easy agglomeration and non-uniform dispersion of nano-silica in a traditional physical blending method are solved, and uniform distribution and strong interface bonding of nano-particles are realized through in-situ compounding. The obtained silicon dioxide / polyetherketoneketone composite film has excellent wear resistance, high toughness and good mechanical strength, keeps thermal stability, and has wide application prospects in the fields of surface wrapping of interior trim parts of aerospace crafts, protective layers of chemical mechanical equipment and precise instruments and the like.

The invention discloses a preparation method of a carbon fiber / polyetherketoneketone composite coating and a coating thereof, and the preparation method specifically comprises the following operation steps: dissolving polyetherketoneketone in a strong polar solvent to prepare a homogeneous solution; according to the carbon fiber / polyetherketoneketone composite coating, double-layer electrostatic spraying is combined with hot rolling and surface polishing treatment, and the compactness, uniformity and tribological performance of the coating are improved. According to the invention, the problems of non-uniform carbon fiber dispersion, too low resistivity of the carbon fiber composite coating and insufficient compactness of the composite coating in the traditional coating process are solved. The invention provides an efficient and controllable technical approach for preparing the high-performance carbon fiber / polyether ketone ketone composite coating and coating, and is suitable for the surfaces of robot joints, bearings, aerospace precision transmission parts and medical instrument wear-resistant components.

This invention discloses a high-performance polyether ketone ketone fine synthesis process, including the following steps: Step 1: raw material preparation; Step 2: raw material pretreatment; Step 3: monomer activation; Step 4: segmented polymerization; Step 5: gradient post-treatment. This invention achieves precise targeted modification of different performance shortcomings of polyether ketone ketone through hydroxyl-terminated bisphenoxyphenyl sulfone, rare earth modified hexaphenoxycyclotriphosphazene, amino-based graphene quantum dots, and fluorinated aryl end-capping agents. Unlike conventional methods of single-component modification or physical blending, this invention achieves synergistic effects through intermolecular hydrogen bonding and chemical bonding, fundamentally solving the limitations of traditional polyether ketone ketone performance improvement and realizing systematic optimization of comprehensive performance.

This application relates to the field of polymers and discloses a method for refining polyether ketone ketone and a refined polyether ketone ketone product. The method includes (1) treating the polyether ketone ketone complex with a pretreatment agent; (2) mixing the crude polyether ketone ketone with a mixed chain-supporting solution and washing to obtain a first product, wherein the mixed chain-supporting solution includes a main chain-supporting agent and a co-solvent, wherein the main chain-supporting agent includes one or more selected from p-chlorophenol, trifluoroacetic acid, difluoroacetic acid, dichloroacetic acid, and chloroacetic acid, and the co-solvent includes one or more selected from N,N-dimethylformamide, dimethyl sulfoxide, water, N-methylpyrrolidone, and N-methylformamide; (3) adding a mixed aqueous solution to the first product to remove at least some metal ions to obtain a second product; and (4) washing the second product multiple times with an organic solvent, followed by washing with water and drying to obtain the refined polyether ketone ketone. The polyether ketone ketone obtained by this method has a low aluminum ion content.

A thermoplastic resin composition containing a crystalline thermoplastic polyimide resin (A) and a polyether ketone ketone resin (B), the crystalline thermoplastic polyimide resin (A) containing a repeating structural unit represented by the following formula (1) and a repeating structural unit represented by the following formula (2), a content ratio of the repeating structural unit of formula (1) with respect to the total of the repeating structural unit of formula (1) and the repeating structural unit of formula (2) being 15 to 70 mol %, whereinan absolute value of a difference between a melting point Tma of the component (A) and a melting point Tmp of the component (B), |TmA−TmB|, is 0 to 40° C.wherein R1 represents a divalent group having from 6 to 22 carbon atoms containing at least one alicyclic hydrocarbon structure; R2 represents a divalent chain aliphatic group having from 5 to 16 carbon atoms; and X1 and X2 each independently represent a tetravalent group having from 6 to 22 carbon atoms containing at least one aromatic ring.

The invention relates to the technical field of polymers, and provides polyetherketoneketone powder based on a microfluidic technology and a preparation method and device thereof, and the method comprises the following steps: taking a first liquid containing polyetherketoneketone as a dispersion phase, and taking a second liquid as a continuous phase; the solvent of the first liquid is a first solvent; the boiling point of the first solvent is higher than the melting point of the polyether ketone ketone; the second liquid and the first solvent are immiscible; the dispersed phase with the temperature of T1 and the continuous phase with the temperature of T2 enter the micro-fluidic chip, the dispersed phase is located in an inner phase channel of the micro-fluidic chip, the continuous phase is located in an outer phase channel of the micro-fluidic chip, the outer phase channel is concentrically arranged outside the inner phase channel in a sleeving mode, and the continuous phase is located in an inner phase channel of the micro-fluidic chip. The dispersed phase is sheared by the continuous phase to form monodispersed droplets. By means of the method, the high sphericity degree and the regular morphology of the powder can be guaranteed. The particle size and distribution of the powder can be accurately controlled by adjusting parameters such as two-phase flow velocity, viscosity, chip size and the like.

Disclosed is a dental implant crown that includes a front piece, a back piece, and a mechanical interface. The front piece is configured to form a front portion of a tooth morphology. The front piece is made from a material selected from a group including composite, Polymethyl methacrylate (PMMA), and zirconia. The back piece is configured to form a back portion of the tooth morphology. The back piece is made from either polyetheretherketone (PEEK), Titanium, polyaryletherketones (PAEKs), or PEKK (Polyether Ketone Ketone). The mechanical interface is configured to securely hold the front piece and the back piece together to create a complete tooth morphology. The mechanical interface is configured to maintain a structural integrity while allowing the use of different materials for the front piece and back piece to achieve the desired aesthetic and a functional property.