57 results about "Polybutyl methacrylate" patented technology

Thin polymer films may comprise a first polymer layer comprising poly(vinylidene fluoride); a second polymer layer comprising poly(vinylidene fluoride); and a nanofiller-polymer layer interposed between the first polymer layer and the second polymer layer, the nanofiller-polymer layer comprising poly(methyl methacrylate) and nanosheets dispersed in the poly(methyl methacrylate); the nanosheets comprising mica nanosheets and / or hexagonal boron-nitride nanosheets; wherein 50-99% of the nanosheets in the nanofiller-polymer layer are oriented parallel to a width dimension of the first polymer layer.

The invention discloses an anti-fouling easy-to-clean coating and a preparation method thereof, and relates to the technical field of coatings. The invention discloses an anti-fouling easy-to-clean coating. The coating comprises the following raw materials in parts by weight: 30-50 parts of polymethyl methacrylate, 10-15 parts of modified nano titanium dioxide, 20-30 parts of a fluorocarbon polymer, 3-8 parts of a silane coupling agent, 8-12 parts of nano zinc oxide, 5-10 parts of a plasticizer, 2-6 parts of a dispersant, 1-3 parts of a leveling agent, 4-8 parts of a cross-linking agent, 1-3 parts of an antioxidant, 3-7 parts of a modified cellulose derivative and 2-5 parts of an antibacterial agent. And 5-10 parts of a modified shape memory polymer microcapsule. The anti-fouling and easy-to-clean coating disclosed by the invention is high in anti-fouling property, and the fluorocarbon polymer and the modified nano titanium dioxide are cooperated, so that stains are difficult to attach and can be decomposed by photocatalysis; cleaning is easy, and stains can be easily removed due to the low surface; the water seepage resistance is good, and the special modified cellulose derivative effectively blocks moisture; the antibacterial effect is good, and various microorganisms can be inhibited; and the self-repairing capability is also achieved, recovery can be achieved after damage, the service life is greatly prolonged, and the material protection requirement is comprehensively met.

A protective mask suited for quick regulatory approval and mass production to provide protective use of a wearer includes a mask body having a major portion forming at least one breathing opening configured for holding a filter. The mask body forms a cover contoured to cover, except for the at least one breathing opening, the wearer's mouth and nose when the mask is worn. The mask body further has a flange, wherein a length of the flange extends along a major portion of an edge of the mask body major portion, the flange being configured for pressing against the wearer's face when the mask is worn. The mask body is a material selected from the group consisting of polyethylene terephthalate, polyethylene terephthalate glycol, and poly methyl methacrylate, and combinations thereof.

The invention discloses an ultraviolet light modulated depletion type graphene field effect transistor (UV-GFET) and a preparation method thereof. The ultraviolet light modulated depletion type graphene field effect transistor sequentially comprises a Si / SiO2 substrate layer, a metal electrode layer, a graphene film sensing layer and a quantum dot doped insulated gate layer from bottom to top, and the top of graphene is covered with a polymethyl methacrylate (PMMA) organic matter thin layer containing quantum dots to serve as a gate insulating layer. When quantum dots in the PMMA thin layer release hole-electron pairs under the irradiation of ultraviolet light due to a photoelectric effect, the hole concentration is reduced and the conductivity is reduced after graphene absorbs electrons, so that the resistance of the GFET is increased, and the function of regulating and controlling the resistance of the depletion type graphene field effect transistor through ultraviolet light is realized.

The application discloses a perovskite quantum dot enhanced diffusion plate and a preparation method thereof, and relates to the technical field of optical elements. The preparation method comprises the following steps: heating and smelting inorganic glass raw materials and quantum dot precursors, quenching and cooling, tempering and crystallizing, obtaining quantum dot glass, grinding and granulating the quantum dot glass to obtain quantum dot glass powder, mixing modified polymethyl methacrylate, the quantum dot glass powder and diffusion particles, and then adding the mixture into an injection molding machine to perform extrusion, and finally obtaining the perovskite quantum dot enhanced diffusion plate. The methyl methacrylate is modified, the problem that the charge encounters great obstruction when being transmitted between the quantum dot and the methyl methacrylate is solved, and the luminous efficiency of the diffusion plate is improved.

The application discloses an up-conversion circular polarization fluorescent device of perovskite quantum dots, which comprises, from bottom to top, a light-transmitting glass substrate, a parallel orientation layer, a reflection layer, a transparent separation layer and a composite nanomaterial layer; the reflection layer is a polymer cholesteric liquid crystal layer; the transparent separation layer is made of one of polymethyl methacrylate and polyvinyl alcohol; the composite nanocrystal material layer is composed of perovskite quantum dots / up-conversion nanocrystal composite nanomaterial; the perovskite quantum dots / up-conversion nanocrystal composite nanomaterial is prepared by an in-situ synthesis method. The device has the properties of circular polarization luminescence and up-conversion circular polarization luminescence, and has excellent performances such as high stability, high energy transfer efficiency, high radiation intensity and good repeatability.

A method for producing a polymethyl methacrylate plate includes the steps of providing a mould that includes at least one gasket which is enclosed between two substantially parallel mould parts, introducing liquid including methyl methacrylate prepolymer and / or methyl methacrylate monomer in the mould and enabling polymerization of the liquid methyl methacrylate. A gasket is used in a mould for producing a polymethyl methacrylate plate.

Thin polymer films may comprise a first polymer layer comprising poly(vinylidene fluoride); a second polymer layer comprising poly(vinylidene fluoride); and a nanofiller-polymer layer interposed between the first polymer layer and the second polymer layer, the nanofiller-polymer layer comprising poly(methyl methacrylate) and nanosheets dispersed in the poly(methyl methacrylate); the nanosheets comprising mica nanosheets and / or hexagonal boron-nitride nanosheets; wherein 50-99% of the nanosheets in the nanofiller-polymer layer are oriented parallel to a width dimension of the first polymer layer.

The application provides a kind of poly (methyl methacrylate) and polyethylene glycol blend asymmetric nanofiltration membrane and application, the poly (methyl methacrylate) and polyethylene glycol blend asymmetric nanofiltration membrane, poly (methyl methacrylate) (PMMA) and polyethylene glycol (PEG) two polymers are stirred and dissolved in N, N-dimethylformamide solvent to form casting solution, the nanofiltration membrane of specific thickness is prepared by doctor blade, then, the prepared nanofiltration membrane is placed in fume hood and stands, based on the different solvent evaporation rates of upper layer and bottom of nanofiltration membrane, form a blend asymmetric nanofiltration membrane with dense structure, immerse the blend asymmetric nanofiltration membrane in deionized water, remove the solvent by phase transfer method, and then solidify the membrane; in the process of membrane preparation, poly (methyl methacrylate) is the main support material, polyethylene glycol is the pore former and hydrophilic material, and the membrane realizes efficient separation and removal of neutral chlorophenol disinfection by-products with molecular weight ≤200 in water.

The invention discloses a high-impact-resistance composite bulletproof mask and a preparation method thereof, and relates to the technical field of bulletproof masks. The bulletproof mask comprises an outer layer, a middle layer and an inner layer, the outer layer is made of borosilicate glass, the middle layer is made of polymethyl methacrylate, the inner layer is made of polycarbonate, and after the multiple layers are bonded and compounded through acrylate bonding materials, the two ends of an inner layer polycarbonate plate are longer than the middle layer and outer layer materials. And the epitaxial part of the substrate is bonded with the borosilicate glass plate and the side plate of the polymethyl methacrylate plate at the same time to form a coated structure. The bulletproof mask can effectively fix the outer layer and the middle layer, when the bulletproof mask is impacted by bullets, the coating layer can provide reverse tensile stress, the layering phenomenon is reduced, the range of a center impact point fragmentation area is reduced, no fragments fly out, the problems of impact interface layering and fragment splashing are effectively solved, and the integrity and stability of the structure are improved.

The application provides a kind of nanometer crack-based underwater acoustic sensor and its preparation method, belongs to hydrophone technical field.The method first, in the flexible polymer surface deposition a layer of metal film, spin coating a layer of photoresist on the metal film surface of flexible polymer, photoresist and metal film patterning;Second, the photoresist on the metal film is again patterned;Third, the flexible polymer and metal film are bent to produce nanometer crack on the metal film;Finally, the flexible polymer, polymethyl methacrylate, glass sheet are bonded, and after injecting pure water in the cavity, it is sealed to obtain underwater acoustic sensor.The nanometer crack-based underwater acoustic sensor manufactured by the application has ultra-high sensitivity, by bonding the nanometer crack sensing unit with ultra-high sensitivity and flexibility on the substrate with cavity, the ultra-sensitive detection of low-frequency underwater acoustic can be realized, and the detection range of the underwater acoustic sensor is improved.

The application provides monodisperse polymethyl methacrylate surface modified microspheres and a preparation method thereof, and belongs to the technical field of microsphere modification. The preparation method comprises the following steps: ultrasonic dispersion is performed on monodisperse polymethyl methacrylate microspheres and an organic solvent to obtain pretreated polymethyl methacrylate microsphere suspension; the pretreated polymethyl methacrylate microsphere suspension, a modifier and a catalyst are reacted to obtain monodisperse polymethyl methacrylate surface modified microspheres. The method can effectively maintain the uniform particle size advantage of the monodisperse PMMA microspheres; the modification uniformity is good, the functional group is controllable; the performance of the microsphere body is not damaged; the surface activity of the modified monodisperse PMMA microspheres is significantly improved, and the dispersibility and compatibility are greatly improved.

The present application relates to the technical field of lens mask, especially to a highway LED transparent lens mask and a preparation method thereof, which comprises the following components by weight: 80-90 parts of poly(methyl methacrylate)-b-poly(glycidyl methacrylate) block copolymer (PMMA-b-PGMA); 0.5-2.0 parts of nano-scale cerium-doped zinc oxide (Ce-ZnO) quantum dots; 5-10 parts of random ethylene-methyl acrylate-glycidyl methacrylate terpolymer; 1-3 parts of photochromic spiropyran derivative modified silica nanoparticles; and 1-3 parts of hyperbranched fluorinated polyether. The high light transmittance is ensured, and the active sites are provided through the PGMA block, which is conducive to the uniform dispersion and chemical bonding of other functional components. The nano-scale cerium-doped zinc oxide (Ce-ZnO) quantum dots are introduced to realize efficient ultraviolet blocking and light stability.

This invention relates to the field of polymer molding technology, specifically to a high-temperature resistant, dimensionally stable acrylic sheet and its preparation and shaping process, comprising the following components: 80-95 parts by weight of polymethyl methacrylate matrix resin, 5-20 parts by weight of isoborneol methacrylate, 2-6 parts by weight of nano-silica, 0.4-1.2 parts by weight of silane coupling agent, 0.2-0.6 parts by weight of initiator, 0.5-1.5 parts by weight of crosslinking agent, 0.1-0.4 parts by weight of antioxidant, 0.1-0.3 parts by weight of light stabilizer, and 0.05-0.2 parts by weight of release agent. By introducing isoborneol methacrylate as a comonomer into the polymethyl methacrylate matrix, the glass transition temperature of the polymer is significantly increased by utilizing the cyclic rigid groups in its molecular structure. Combined with the reinforcing effect of nano-silica, the high-temperature resistance of the acrylic sheet is significantly improved, with a heat distortion temperature and Vicat softening temperature significantly higher than those of ordinary acrylic sheets.

The utility model relates to the technical field of polymethyl methacrylate production discloses a reaction kettle for polymethyl methacrylate production, including base, the base upper surface is installed with the reaction kettle body, the reaction kettle body includes the inner kettle body and the outer kettle body, the inner kettle body with the outer kettle body between constitute sandwich, the sandwich is around and is equipped with circulating pipeline, the circulating pipeline is filled with synthetic type heat conducting oil, the both ends of circulating pipeline are connected with refrigerator and heating machine in common, the drive motor is fixed on the outer kettle body upper surface, the free end of drive motor output shaft is connected with the stirring shaft that presents hollow structure, the stirring shaft passes the sandwich and extends to the inner kettle body bottom, the reaction kettle body top is equipped with the feed inlet and the exhaust pipe, the reaction kettle body bottom is equipped with the discharge gate. The utility model solves the technical problem that the existing reaction kettle can not realize accurate temperature control, efficient stirring and risk prevention and control simultaneously.

The present invention relates to the field of films, and more particularly to a BOPP matt film with optimized cutting performance based on paper-plastic lamination and a preparation method thereof, wherein the BOPP matt film comprises a matt layer, a core layer and a lower surface layer; the matt layer comprises a random copolymerized polypropylene, 40-55wt% high-density polyethylene and 5-10wt% polymethyl methacrylate-polybutyl acrylate-polymethyl methacrylate triblock copolymer; the core layer comprises homopolypropylene, 10-15wt% styrene-maleic anhydride copolymer, and 3-8wt% maleic anhydride grafted polypropylene; and the lower surface layer comprises homopolypropylene. The present invention optimizes the components of the core layer and the matt layer, improves the brittleness of the core layer and the matt layer, reduces the ability to resist fracture, and makes the laminated product obtained by laminating the BOPP matt film with paper shorten the tail film length or even do not produce a tail film after cutting and breaking the film, meets the application requirements of downstream customers, and can be produced at high speed and automatically.

The invention discloses a method for synchronously separating ovalbumin, ovotransferrin and lysozyme from egg white, which comprises the following steps: firstly, adsorbing ovalbumin from egg white loading liquid by taking chitosan-polybutyl methacrylate nanocrystal gel with an anion exchange function as a primary separation medium, and carrying out gradient elution to obtain ovalbumin; taking a primary separation loading effluent as a secondary separation loading solution; hydroxyethyl methylacrylate-polyglycidyl methacrylate nanocrystal gel with a cation exchange function is taken as a secondary separation medium to adsorb ovotransferrin and lysozyme from a secondary separation loading solution, gradient elution is performed by gradually increasing salt concentration, and separation of ovotransferrin and lysozyme is realized. The method provided by the invention can realize synchronous separation of ovalbumin, ovotransferrin and lysozyme, has the advantages of high separation efficiency, simplicity and convenience in operation, low energy consumption and the like, and is suitable for industrial large-scale production, and the separation medium can be repeatedly used.

The invention belongs to the technical field of plastic waste treatment, and particularly relates to a degradation method of polymethyl methacrylate. The degradation method of polymethyl methacrylate provided by the invention comprises the following steps: mixing polymethyl methacrylate and a catalyst, and then carrying out ball milling to obtain a degradation product of polymethyl methacrylate, the catalyst comprises tartaric acid or succinic acid; the degradation product of the polymethyl methacrylate comprises methyl methacrylate. According to the invention, the catalyst can directionally attack ester groups in polymethyl methacrylate under the mechanical force of a ball mill, so that chain fracture occurs; and degrading the polymethyl methacrylate into methyl methacrylate. The degradation method provided by the invention does not need extra energy and has remarkable economical efficiency and high efficiency, and a product obtained by degradation has relatively high specificity.

The present invention relates to a process for preparing a purified methyl methacrylate composition from a crude composition containing methyl methacrylate, comprising the steps of: a) providing a pyrolysis composition obtained by pyrolysis of a polymethyl methacrylate composition as a crude composition, b) subjecting the pyrolyzed composition to at least one distillation step in order to obtain a methyl methacrylate-rich composition, and c) then subjecting the methyl methacrylate-rich composition to at least one melt crystallization step in order to obtain a purified methyl methacrylate composition.

Electrochemical cells employing liquefied gas electrolytes may experience degradation of certain polymer components, such as tapes made from poly(ethylene terephthalate), poly(butylene terephthalate), or polydimethylsiloxane. These materials exhibit low chemical stability, potentially leading to cell failure. Embodiments disclosed herein utilize stable polymers, including polyimide, polypropylene, or polyethylene as tape carriers and poly(methyl methacrylate) as adhesives, to enhance compatibility and performance in such cells.

The application discloses a high-temperature-resistant organic fluorescent powder and a preparation method thereof. The organic fluorescent powder comprises a fluorescent seed formed by a poly-methyl methacrylate (PMMA) coated Sm 0.4 Yb 0.2 Er 0.4 (HTTA)3Phen fluorescent material, and a silica aerogel layer coated on the surface of the fluorescent seed. In the preparation, the organic fluorescent seed is prepared first, then the fluorescent seed is introduced in the preparation of the silica aerogel, and finally the high-temperature-resistant organic fluorescent powder with a core-shell structure is synthesized. The high-temperature-resistant light conversion powder can not only realize up-conversion and down-conversion, but also can improve the high-temperature resistance and optical performance of the light conversion powder, reduce light loss, improve mechanical performance, and adapt to the preparation mode of downstream products such as high-temperature extrusion.

The invention relates to the technical field of high polymer materials, in particular to a transparent polyester base material for a window film, a preparation method and application. The transparent polyester base material for the window film comprises an acrylic resin coating and a polyester film, the polyester film sequentially comprises an outer surface layer, a middle core layer and an inner surface layer from top to bottom, and the outer surface of the outer surface layer is coated with the acrylic resin coating online; the acrylic resin coating is prepared from the following raw materials in parts by weight: 70 to 80 parts of polymethyl methacrylate, 0.5 to 5 parts of ammonium thiocyanate, 4 to 18 parts of melamine, 1 to 5 parts of glycol ether, 2 to 8 parts of colloidal silicon dioxide, 1 to 3 parts of an ultraviolet light absorber, 0.5 to 2 parts of nano-silver particles and 3 to 7 parts of a toughening agent.

Electrochemical cells employing liquefied gas electrolytes may experience degradation of certain polymer components, such as tapes made from polyethylene terephthalate), poly(butylene terephthalate), or poly dimethyl siloxane. These materials exhibit low chemical stability, potentially leading to cell failure. Embodiments disclosed herein utilize stable polymers, including polyimide, polypropylene, or polyethylene as tape carriers and poly(methyl methacrylate) as adhesives, to enhance compatibility and performance in such cells.

Thermoplastic compositions, methods of making the compositions, and composites including the compositions are described. The thermoplastic compositions can contain 55 wt. % to 85 wt. % of a poly(methyl methacrylate) (PMMA) or copolymers thereof, 2 wt. % to 25 wt. % of a poly(carbonate-siloxane) copolymer having a siloxane content of 30 wt. % to 50 wt. %, and an acrylic copolymer based impact modifier.

The invention discloses a manufacturing and forming method of a liquid crystal display screen backlight plate containing an LED light bar, and relates to the technical field of liquid crystal display screens, and the manufacturing and forming method comprises the following steps: selecting a polymethyl methacrylate and polycarbonate blending material to manufacture a light guide plate; compounding a metal reflecting layer with a preset pattern on the bottom surface of the light guide plate through a hot press molding process; a groove with a trapezoidal section is reserved along the edge of the light guide plate, a graphene conductive coating is arranged at the bottom of the groove, and meanwhile, an LED light bar assembly with heat dissipation fins is embedded; filling a gap between the light bar and the groove with a nano-particle doped ultraviolet curing adhesive to form an optical diffusion layer; and a backlight plate main body structure is formed at a time through an in-mold cutting process. Through the technical improvements of light guide plate material optimization, metal reflecting layer structure improvement, LED light bar installation mode innovation, filling material upgrading, optical compensation algorithm introduction, in-mold cutting process application and the like, the brightness uniformity, the heat dissipation performance and the installation efficiency of the backlight plate are remarkably improved, and the service life of the backlight plate is remarkably prolonged.

A composition comprising specific amounts of a poly (methyl methacrylate), a poly (carbonate-siloxane), an acrylic impact modifier, a polyethylene, and a siloxane-containing anti-scratch additive. The composition can exhibit a desirable combination of good mechanical properties and scratch resistance. Methods of making the compositions and articles comprising the compositions are also disclosed.

The present invention relates to a poly(methyl methacrylate) composition and its use, which comprises 85 to 98 wt. % of poly(methyl methacrylate) having a loss factor tan δ of at least 10, relative to the weight of the composition, and 2 to 15 wt. % of a copolymer comprising polyamide blocks and polyether blocks, relative to the weight of the composition.

The present invention relates to a poly(methyl methacrylate) (PMMA) based bone cement composition comprising a softener and the use of said bone cement composition in discoplasty procedures. The use is characterized by injection of the composition into a disc, hence stabilizing the intravertebral disc, reducing lower back pain and increasing life quality in the affected subject.