54 results about "Polymer interaction" patented technology

A fluoropolymer coated film comprising polymeric substrate film and fluoropolymer coating on the polymeric substrate film. The fluoropolymer coating comprises fluoropolymer selected from homopolymers and copolymers of vinyl fluoride and homopolymers and copolymers of vinylidene fluoride polymer blended with compatible adhesive polymer comprising functional groups selected from carboxylic acid, sulfonic acid, aziridine, anhydride, amine, isocyanate, melamine, epoxy, hydroxy, anhydride and mixtures thereof. The polymeric substrate film comprises functional groups on its surface that interact with the compatible adhesive polymer to promote bonding of the fluoropolymer coating to the substrate film.

The invention relates to the clay surface modification, in particular to modified clay with silane coupling agent grafted surface, preparation method and application thereof. The grafting modification of the silane coupling agent with a grafting amount of 0.2-5*10<-3> mol/gram clay is performed in solvent by using reactive hydroxyl group on a clay sheet layer. The inventive modified clay, in which the silane coupling agent is grafted on the clay sheet layer via the covalent bond, has strong thermostability and realizes clay functionalization while improving the clay surface lipophilicity. As the inventive clay has high thermostability and enhanced interaction with polymer, it can be used for the preparation of polymer/clay nanometer composite material to improve the clay dispersibility in the polymeric matrix for stripping and dispersing, thereby improving the performance of the composite material.

This invention discloses a method for preparing rubber compositions that exhibit unique combinations of properties that are desirable for tire tread applications for enhanced snow/ice and wet traction, low rolling resistance and increased treadwear performance in comparison with conventional silica compounds. Specifically, a high reactively silane coupling agent, such as a mercaptosilane, is used in combination with a silane coupling typically used for silica tread compounds such as bis(triethoxylsilylpropyl)disulfide to treat silica pellets in a hydrocarbon solvent at elevated temperatures. The treated silica is then blended with solution elastomer cement in a hydrocarbon solvent. The deposited reactive silanes partially react with the elastomer molecules forming a layer of polymer grafted on the silica surfaced. This structure significantly improves the silica retention during the steam stripping operation. Almost 100% (99+%) silica retention has been achieved by this invention. After solvent removal from steam stripping, the treated silica/elastomer mixer is dewatered and dried using conventional equipment such as shaker screens, expellers and expanders to form a well-dispersed silica masterbatch. This technique results in silica compounds with excellent silica dispersion and increased filler-polymer interaction, hence enhanced compound performance such as better physical properties, more desirable dynamic properties (low hysteresis at high temperatures and high hysteresis at low temperatures) and increased abrasion resistance.

A liquid fluoropolymer coating composition and a process for using the composition to make fluoropolymer coated polymeric substrates. The liquid fluoropolymer composition comprises fluoropolymer selected from homopolymers and copolymers of vinyl fluoride and homopolymers and copolymers of vinylidene fluoride polymer, solvent, and compatible adhesive polymer comprising functional groups selected from carboxylic acid, sulfonic acid, aziridine, amine, isocyanate, melamine, epoxy, hydroxy, anhydride and mixtures thereof. In the process, the composition is applied to a polymeric substrate comprising functional groups on its surface that interact with said compatible adhesive polymer to promote bonding of said fluoropolymer coating to said substrate. The solvent is removed from the coating composition applied to the substrate to form a fluoropolymer coating on the substrate.

The invention relates to a flooding system used for improving the recovery factor after polymer flooding and a preparation method thereof, which belongs to the technical field of enhanced recovery of oil fields. A surfactant with unlike charges and a polymer react with each other to produce a high-activity compound; and the high-activity compound is mixed with a non-ionic surfactant to produce the novel flooding system. The novel flooding system solves the problems of the poor temperature resistance and the inorganic high valence cation resistance of the prior flooding system. The novel flooding system has the advantages of high viscocity, ultra-low interfacial tension, low feeding quantity and so on. The system has wide application prospects in oil fields to apply the technology for improving the oil recovery factor.

A method for furnishing a therapeutic-agent-containing medical device is provided. The method comprises: (a) providing a reactive layer comprising a cross-linking agent on a medical device surface; and (b) subsequently applying a polymer-containing layer, which comprises a polymer and a therapeutic agent, over the reactive layer. The cross-linking agent interacts with the polymer to form a cross-linked polymeric region that comprises the therapeutic agent. Examples of medical devices include implantable or insertable medical devices, for example, catheters, balloon, cerebral aneurysm filler coils, arterio-venous shunts and stents.

A proton-exchange composite includes a polymer matrix formed from a proton-exchange polymer and ionomer particles distributed therein. The polymer has side chains with ionic groups. The particles have an average particle size of less than 20 nm and include an oligomeric ionomer that interacts with the polymer and attracts the ionic groups on its side chains. The composite may be formed by a method in which an initiator is bonded to silica particulates. The initiator is used to initiate polymerization of a precursor monomer to form a salt form of the oligomeric ionomer bonded to the silica particulates, which is then reacted with an acid to produce the oligomeric ionomer, thus forming the ionomer particles. The ionomer particles are dispersed in a solution containing a solvent and the polymer dissolved therein. The solvent is removed. The residue is cured to form the composite.

The present invention discloses a rubber composition and a preparation method thereof, and a vulcanized rubber. The rubber composition preparation method comprises: (1) carrying out first mixing on solution polymerized styrene-butadiene rubber, white carbon black, a surface modifier and an optional cis-polybutadiene rubber to prepare white carbon black rubber master batch; (2) carrying out second mixing on the white carbon black rubber master batch, an activator, an anti-aging agent, a softening agent and an optional carbon black to prepare a second-stage rubber master batch; and (3) carrying out third mixing on the second-stage rubber master batch, an accelerator and a vulcanizing agent to obtain the final mixed rubber. According to the present invention, in the processing process, the effect of the surface modifier can be well provided, the complete interaction between the white carbon black and the polymer can be easily achieved, the strength of the vulcanized rubber prepared through the vulcanization can be improved, the heat generation of the vulcanized rubber can be reduced, and the wet skid resistance of the vulcanized rubber can be improved.

A method of making and polymer compositions with enhanced adhesion that include a rubbery or glassy polymer, about 0.1 to 30% by weight of carbon black filler and from about 0.1 to 5% by weight of carbon filler. Preferred polymers are polybutadiene, brominated isobutylene methylstyrene, polystyrene or polymethylmethacrylate and preferred carbon fillers are colloidal silica, pure graphite particles and a carbon black filler heat treated to an extent sufficient to reduce interaction with the polymer.

The invention discloses a plastic plasticizing method and device based on a CO2 laser, and relates to the field of laser plasticizing molding processing. The invention is based on the photothermal effect of the interaction between the laser and the polymer. For the light energy generated by the CO2 laser, most plastics almost completely absorb it. Through precise control of laser parameters: wavelength, spot size, energy, and irradiation method, the temperature rise range of laser irradiated plastics is controlled, and the plastic solid is heated and plasticized by laser to realize the polymer from glass state to high elastic state to viscous flow state. The plasticizing process, and finally complete the polymer molding process. The invention has the advantages of short plastic melting time, uniform plasticization and good plasticization stability, overcomes the problems of low plasticization efficiency and uneven plasticization in the traditional plasticization process, is suitable for plastic micro-molding processing, and has high application value.

The invention provides a method for preventing a grid electrode from damage in an ion implantation process. The ion implantation process comprises a photoresist forming step, an ion implantation step and a plasma photoresist removal step. A surface treatment step is also comprised between the ion implantation step and the plasma photoresist removal step. The surface treatment step comprises a washing step, a baking step and a cooling step. In the method for preventing the grid electrode from the damage in the ion implantation process, the surface treatment step is added between the ion implantation step and the plasma photoresist removal step so as to remove a hard surface layer formed on the surface of a photoresist and a polymer formed in the photoresist in the ion implantation step, and further, the phenomenon that a plasma and the polymer act with each other to explode in the plasma photoresist removal step is avoided, thereby, the condition that the grid electrode is damaged is avoided, and the quality of a device is improved.

The invention discloses a method and a device for plasticizing plastics based on a Nd: YAG solid state laser, relates to the laser micro-molding field, and is suitable for plasticizing, molding and processing micro-scale plasticized micro-plastics, such as miniature gears, connectors, chips and the like. According to the invention, the heat effect caused by interacting of a laser energy field and a polymer can be used, the plastic is irradiated under the laser with high energy density to absorb light energy, a rapid temperature rising is realized to reach the fusing temperature so that the micro-molding processing can be completed. The device of the invention comprises an Nd: YAG laser, a laser beam regulator, a restraint layer, a plasticizing cylinder, a molding die, a work bench and a controller. The method of the invention is used for plasticizing or molding plastics, and has the characteristics of high plasticizing efficiency of plastics, good quality, energy saving, environmental protection, simple and easy operation and good processing flexibility, and can realize the plastic micro-molding processing with high efficiency and environmental protection.

Self-assembly is defined as the ability of an active ingredient (AI), when mixed with a polymer or polymers (solid or liquid state), to form either a complex or a strong attraction with the polymer/polymers, which influences the controlled release of the total system. This AI-polymer interaction or strong attraction can form in the solid state or in solution. The AI-polymer interaction also can form when applied to a filter paper, soil, seeds, or plant vegetation substrates, where the AI and polymer self-assembles into an AI-polymer-substrate matrix or complex that influences how the AI releases from the complex or matrix in a controlled manner.

A pattern-forming method includes forming a base pattern including a first polymer on a front face side. A composition is applied on at least a lateral face of the base pattern. The composition includes at least one polymer that is capable of interacting with the first polymer. The composition is heated such that a portion of the at least one polymer interacts with the first polymer and that a coating film is formed on the lateral face of the base pattern. Another portion of the at least one polymer not having interacted with the first polymer is removed to form a resist pattern. The base pattern in a planar view has a shape with a long axis and a short axis, and a ratio of lengths of the long axis to the short axis is no less than 1.5 and no greater than 10.

Design of side chains yielding highly amphiphilic conjugated polymers is proven to be an effective and general method to access lyotropic liquid crystalline mesophases, allowing greater control over crystalline morphology and improving transistor performance. The general strategy enables variations in structure and interactions that impact alignment and use of liquid crystalline alignment methods. Specifically, solvent-polymer interactions are harnessed to facilitate the formation of high quality polymer crystals in solution. Crystallinity developed in solution is then transferred to the solid state, and thin films of donor-acceptor copolymers cast from lyotropic solutions exhibit improved crystalline order in both the alkyl and π-stacking directions. Due to this improved crystallinity, transistors with active layers cast from lyotropic solutions exhibit a significant improvement in carrier mobility compared to those cast from isotropic solution. One or more embodiments of the present invention achieve a maximum carrier mobility of 0.61 cm²V⁻¹s⁻¹.

The present invention concerns a method for determining the concentration of cationic polymers present in a sample, according to the following steps: —bringing the cationic polymer or polymers present in the sample into contact with, and enabling the interaction thereof with, a developer solution comprising lanthanide (III) ions and at least one bonding agent, and —exciting the sample at an excitation wavelength λ_exc and detecting, by time resolved photoluminescence, a signal originating from the lanthanide (III) ions having interacted with the at least one bonding agent having previously interacted with the cationic polymer or polymers, at an emission wavelength λ_em, and —determining the cationic polymer concentration of the sample by using the signal detected at the emission wavelength λ_em, the sample originating from water originating from municipal or industrial water or sludge treatment processes.

Provided are polyethylene glycol drug conjugates of general formula (I), (II) or (III) and pharmaceutical compositions and a use thereof. The conjugates are formed by combining low molecular weight polyethylene glycol with 2-4 drug molecules. The conjugates can interact with receptor dimers or polymers, thereby improving the in vivo distribution of the drug, changing the oil and water distribution coefficient, enhancing the pharmacological activity, reducing the blood-brain barrier permeability of the drug, and improving the bioavailability of the drug.