421 results about "Backbone chain" patented technology

This invention discloses a solution-based synergistic catalytic method for preparing post-functionalized polyolefins, belonging to the field of polymer material modification technology. The method includes the following preparation steps: adding polyolefin, graft monomer, and catalyst to an organic solvent, stirring until homogeneous, and heating to react, thereby obtaining the post-functionalized polyolefin; wherein the catalyst is a combination of a first catalyst and a second catalyst; and the first catalyst is selected from tert-butyl nitrite, and the second catalyst is selected from N-hydroxysuccinimide and / or N-hydroxyphthalimide. This invention utilizes a synergistic catalytic system composed of tert-butyl nitrite and N-hydroxysuccinimide and / or N-hydroxyphthalimide to activate the C-H bonds of polyolefins in an organic solvent via a free radical mechanism, thereby grafting polar functionalized graft monomers onto the main chain of various polyolefins.

This application discloses a crown ether modified perfluorosulfonic acid resin, its preparation method, its application, and an ion exchange membrane. The main chain of the crown ether modified perfluorosulfonic acid resin is a perfluorocarbon chain. The crown ether modified perfluorosulfonic acid resin includes repeating unit A, which is shown in formula (1): Formula (1); In formula (1), R0 is a crown ether group, a is a positive integer from 0 to 6, and b is a positive integer from 2 to 5. This application can effectively improve the persistence of the ion exchange membrane's free radical quenching effect, while also improving the oxygen resistance of the ion exchange membrane.

The application discloses a preparation method of a composite antioxidant and application thereof, and belongs to the field of high polymer materials. In the application, a ring octene and a silicon-containing cyclic olefin monomer are subjected to metathesis copolymerization under the action of a metathesis catalyst, a silicon-containing polymer is obtained after chemical hydrogenation, and then the composite antioxidant is obtained after hydrolysis and mixing with lignin. The main chain of the composite antioxidant is a saturated hydrocarbon chain, the compatibility with polyethylene is high, the silicon-containing polymer is hydrolyzed to generate active silanol, the active silanol is efficiently bonded with lignin, and the lignin provides natural polyphenol antioxidant function. The application realizes efficient antioxidant of the composite material, high compatibility and long-term durability, and provides a new idea for high-performance environment-friendly high polymer composite materials.

An aspect of the present application provides a CMP polishing liquid for polishing polysilicon, the CMP polishing liquid containing abrasive grains and a cationic polymer, the cationic polymer including at least one selected from the group consisting of a polymer A having a main chain including a nitrogen atom and a carbon atom and a hydroxyl group bonded to the carbon atom and an allylamine polymer B. Another aspect of the present application provides a polishing method including a step of polishing a polishing target material using the CMP polishing liquid.

The present invention relates to a thermoplastic composition comprising, monophasic polypropylene, 0.01 – 5 wt.% of non-aromatic polyester having an average M / E ratio of at least 10, wherein M is the number of backbone carbon atoms in the polyester not including the carbonyl carbons and E is the number of ester groups in the polyester, and 0 - 5 wt.% of optional further components. Such compositions who an improved strain at break.

This invention discloses an arabinogalactan sulfate derived from *Streptococcus filamentosa*, its preparation method, and its applications, belonging to the fields of natural product chemistry and marine biological resource development technology. The technical solution includes an arabinogalactan sulfate derived from *Streptococcus filamentosa*, with a monosaccharide composition comprising arabinose, galactose, and rhamnose, the molar percentage of arabinose being not less than 70%; the main chain backbone is modified with natural sulfate groups, with the sulfate groups replacing at least one hydroxyl site of the arabinose residues. This invention, when applied to anticoagulation, exhibits good safety and a significant anticoagulant effect.

This invention provides a phosphorus-containing flame retardant, its preparation method and application, and a resin composition and its application, specifically relating to the field of polymer materials technology. The phosphorus-containing flame retardant provided by this invention achieves an integrated design of the flame-retardant unit and the elastic matrix at the molecular scale by directionally and controllably grafting phosphorus-containing groups M onto the active sites of the polybutadiene soft segments in a styrene-butadiene-styrene block copolymer via covalent bonds. This structure retains the inherent high flexibility, impact resistance, and processing rheological properties of the styrene-butadiene-styrene block copolymer while imparting intrinsic, durable, and uniformly distributed flame-retardant capabilities to the material. Simultaneously, because the phosphorus element is anchored to the polymer backbone / side chain, no small molecule polar impurities are introduced, significantly suppressing dielectric polarization loss and hygroscopicity increases. This provides a structural basis and performance guarantee for the subsequent construction of a high-end thermosetting resin system for copper-clad laminates with low Dk / Df, high Tg, and low CTE.

The application relates to the technical field of functional films for semiconductor material processing, and discloses a low-residual, heat-resistant and anti-static semiconductor wafer cutting protection film. The protection film comprises a functional adhesive layer arranged on the surface of a base film, and the functional adhesive layer is composed of a synergistically modified polymer matrix, an organic small-molecule interface regulator, a heat-resistant toughening agent, an anti-static auxiliary agent, a residual inhibiting auxiliary agent and a rheological adjusting agent. The synergistically modified polymer matrix is formed by synergistic modification of an acrylate main chain polymer, 2-aminoethyl methacrylate, p-benzene dicarboxaldehyde, tannic acid and an amino-terminated polydimethylsiloxane, and the organic small-molecule interface regulator is 2,5-dihydroxybenzoic acid. The preparation method is simple and controllable, and is suitable for the semiconductor wafer cutting process with high requirements for cleanliness, heat resistance and static control.

This invention discloses a water-washable via-plugging resin composition and its preparation method, as well as a circuit board and its processing method. The water-washable via-plugging resin composition comprises a polymeric resin and an inorganic filler. The polymeric resin includes a structural resin and a reinforcing resin. The structural resin comprises a polymer having repeating units derived from at least one of vinyl alcohol and vinylpyrrolidone. The reinforcing resin comprises an alkali-soluble resin. The surface of the inorganic filler is modified with at least one functional group selected from the group consisting of aniline, alkyl, nitrogen-containing functional groups on the main chain or branches, and double-bonded functional groups. This invention achieves rigid protection of the circuit and via edges during the machining stage, effectively preventing burrs and circuit lifting defects, while ensuring rapid, gentle, and zero-residue peeling during the film removal stage.

The application relates to the technical field of shoe sole materials, in particular to a foamed composite material and application of the foamed composite material in shoe materials, which comprises EVA resin, ethylene-propylene-diene rubber, wear-resistant particles, a filler, a foaming agent, a crosslinking agent, a lubricant and an activator; wherein the wear-resistant particles are modified porous corundum, which is obtained by in-situ ring-opening polymerization of flexible PCL chains in and outside the pores of the porous corundum after surface activation; and the flexible PCL chains further have polyethylene glycol-stearic acid polymer brushes. Compared with the prior art, the application has the beneficial effects that: the EVA provides good processability and elasticity, the ethylene-propylene-diene rubber endows the material with excellent low-temperature performance and aging resistance; the corundum core of the modified porous corundum provides a high-hardness wear-resistant framework, significantly reduces the abrasion amount in a unit volume, the polycaprolactone main chain and the polyethylene glycol-stearic acid side chain compensate the rigidity of the corundum, and guarantee the high resilience, especially the low-temperature resilience, of the EVA material.

The present invention provides a curable resin composition containing a vinyl polymer having a reactive silyl group, which exhibits excellent weather resistance and good extensibility. [Solution] A curable resin composition comprising a vinyl polymer (A), wherein the vinyl polymer (A) has a main chain having repeating units of polymerizable vinyl monomers and reactive silyl groups bonded to the vinyl polymer main chain via a urethane structure, and the vinyl polymer (A) is a polymer obtained by silylation of the plurality of hydroxyl groups of a vinyl polymer (a) having a plurality of hydroxyl groups and a weight-average molecular weight / hydroxyl value of more than 4,000.

This invention discloses a method for preparing a cyclic peptide compound containing a cisamide bioelectron isosteric cyclic peptide. The method involves introducing a thioamide unit at a specific position on the peptide backbone, making it a potential activatable reaction site. This site is selectively activated by a metal salt and undergoes an intramolecular condensation reaction with an acylhydrazine group located in the same peptide chain, generating a 1,2,4-triazole heterocyclic structure in situ. In a single reaction process, the cyclization of the peptide and the precise construction of the cisamide bioelectron isosteric group in the peptide backbone are achieved simultaneously.

The application discloses a kind of high toughness biomass-based composite film for liquid packaging and its preparation method and application, belong to biomass-based packaging material technical field.The composite film is ABA three-layer co-extrusion structure;A layer is composed of modified PLA, PBAT and lignin-containing cellulose nanofiber;B layer is composed of oligosaccharide modified polyester;A layer master batch and B layer material are prepared respectively, and three-layer co-extrusion molding is obtained.The application uses amide bond to covalently fix oligosaccharide on polyester main chain, solves the problems of existing technology, such as easy migration of antibacterial agent, weak interlayer bonding force and insufficient comprehensive performance;Through multivariate blending, the synergistic improvement of mechanical property and barrier property is realized by using multiple intermolecular forces;ABA three-layer co-extrusion structure is used, and interface firm combination is realized by means of interlayer molecular diffusion and hydrogen bond network.The obtained composite film has high toughness, excellent barrier property and antibacterial property, and is suitable for milk, fruit juice and other liquid food packaging.

This invention relates to the field of nitrile butadiene rubber (NBR) technology, and discloses a biodegradable NBR, its preparation method, and its application in gloves. The biodegradable NBR of this invention comprises 60-80 parts by weight of NBR, 3-6 parts by weight of filler, 1.2-1.8 parts by weight of vulcanizing agent, 20-40 parts by weight of polylactic acid (PLA), and 5-12 parts by weight of cyanopolyester. The cyanopolyester of this invention improves the compatibility between PLA and NBR, resulting in a thermoplastic PLA-NBR composite material with higher tensile strength and tear strength, exhibiting excellent mechanical properties. The cyanopolyester's main chain contains a large number of biodegradable ester groups, and the addition of biodegradable PLA further enhances the biodegradability of the NBR material, making it more environmentally friendly and suitable for practical applications in biodegradable gloves.

An inkjet ink that includes (A) a terpene phenol resin, (B) a solvent system containing (B1) ethanol and (B2) a cosolvent, and (C) an amine modified silicone that includes a silicone backbone (main chain) and one or more organoamine side chains attached to the silicone backbone, the inkjet ink being characterized by extended decap times and superior adhesion to a variety of substrates, A printed article including the inkjet ink in dried form, and a method of forming a printed image with a thermal inkjet printhead are also provided.

Disclosed is a film adhesive containing: an epoxy resin; a phenol resin; at least one resin component selected from the group consisting of elastomers and thermoplastic resins; an inorganic filler; and a compound that has a main chain and a side chain that is bonded to the main chain, while containing a polar group in the main chain and / or the side chain. The inorganic filler is formed from a substance that has a thermal conductivity of 10–2000 W / (m·K) at 20°C. The inorganic filler content is 50–90 mass% of the total mass of the film adhesive.

The application belongs to the field of organic solar cell materials, and discloses an organic photoelectric compound based on a vinylcarbazole phosphonic acid structure and a preparation method and application thereof, the organic photoelectric compound has the following four structures: The organic photoelectric compound based on the vinylcarbazole phosphonic acid structure of the application forms firm chemical bonding with a metal oxide electrode (such as ITO or ZnO) through a phosphonic acid group, effectively passivates surface defects, and optimizes energy level alignment; meanwhile, the polymer main chain endows the material with excellent film-forming property and covering capacity, can form a uniform, dense and stable interface layer on the electrode, thereby significantly inhibiting charge recombination, improving carrier selective transmission efficiency, and enhancing the stability of the device in long-term operation and complex environment. The system provides an effective material solution for constructing an OPV device with high performance, high stability and suitable for large-area processing.

The application discloses a kind of photoresponsive self-repair antibacterial nylon materials and preparation method thereof.The material is modified nylon 6 polymer, aromatic Schiff base dynamic imine bond generated by condensation reaction of carboxyl benzaldehyde and p-phenylenediamine is embedded in its molecular main chain, which gives the material the ability of light-triggered self-repair without external heat source, and unexpectedly improves the mechanical properties and thermal stability of the material, the molecular chain end is bonded with antibacterial organic acid through amide bond, and the antibacterial organic acid is 2-methyl-4-(trifluoromethyl) thiazole-5-carboxylic acid.The preparation method adopts one-pot two-stage polymerization, after pressure opening ring prepolymerization, pressure relief vacuum is carried out to carry out deep condensation and end-capping, and the product is obtained by extrusion granulation and drying.The material can realize room temperature self-repair under natural light, and the antibacterial component is non-dissolution fixed.The application process is simple, the performance is adjustable, and can be used in the field of intelligent packaging, repairable antibacterial coating and biomedical materials.

The application discloses a branched polyarylpipeidine film containing a multi-aromatic ring unit and a preparation method and application thereof, and belongs to the technical field of fuel cells and anion exchange membranes for hydrogen production by water electrolysis. The branched polyarylpipeidine main chain is constructed by introducing a multi-aromatic ring branched unit with multiple reaction sites into a conventional linear polyarylpipeidine main chain, so that the packing density of the main chain is reduced, the formation of ion clusters is facilitated, and the membrane conductivity is improved. The branching degree can be controlled by flexibly adjusting the feeding of the multi-aromatic ring branched monomer. The conductivity of the branched polyarylpipeidine film is improved by more than 26% compared with that of the linear film, and the branched film has a lower swelling rate, a higher power density of a hydrogen-oxygen fuel cell and a higher water electrolysis hydrogen production performance.

The application discloses an ion channel based on a poly-polypeptide skeleton and application thereof, and rational use of the poly-polypeptide main chain length difference of different polymerization degrees and the structure-activity relationship difference of different secondary structures of the poly-polypeptide is used in the poly-polypeptide ion channel of the application, the polymerization degree and the secondary structure of the poly-polypeptide are regulated, the length of the poly-polypeptide and the arrangement of the side chain functional groups are regulated, and then the opening or closing of the poly-polypeptide ion channel is regulated, a responsive poly-polypeptide ion channel is designed by introducing a suitable responsive group into the side chain of the poly-polypeptide, and therefore the tumor-specific activation of the poly-polypeptide ion channel is realized, and inspiration is provided for the design and application of the artificial ion channel.

This invention provides a silicon-based anode slurry based on amide-bonded polyimide and its application. The silicon-based anode slurry includes an anode active material and a binder material. The anode active material includes a silicon-containing active material, and the binder material includes polyimide and / or its precursor, wherein the precursor is polyamic acid. The polyamic acid is obtained by polycondensation of a diamine monomer and a dianhydride monomer. The polyimide is obtained by imidization of the polyamic acid. The diamine monomer includes an amide-bonded diamine monomer, and the dianhydride monomer includes an aromatic tetracarboxylic acid dianhydride monomer. This invention introduces an amide-bonded structure into the polyimide backbone to construct a functionalized polyimide binder that combines multiple hydrogen bonding effects with moderate electrolyte compatibility, thereby enhancing the interfacial adhesion between the binder and the silicon active material and inhibiting its swelling in the electrolyte.

This application discloses a high-throughput computational method, apparatus, device, and storage medium for grafted polymers based on molecular dynamics simulation, belonging to the field of computational chemistry technology, and capable of solving the problem of the inability to quickly perform simulation calculations of grafted polymers. The method includes: receiving first parameters of at least one grafted polymer to be simulated; generating a corresponding initial model based on the first parameters, wherein the first parameters include at least the main chain length, side chain length, and grafting density; performing molecular dynamics simulation on the initial model according to pre-configured molecular dynamics parameters to obtain the evolution trajectory of the grafted polymer; determining second parameters of the grafted polymer based on the evolution trajectory, wherein the second parameters include at least the mean square radius of gyration and the mean square end-to-end distance of the main chain; and generating corresponding analysis results based on the first and second parameters, wherein the analysis results include at least the parameter combination corresponding to the grafted polymer and a scatter plot corresponding to the parameter combination.

The present invention relates to an aq. dispersion (XD) of a crosslinking component (X) for cationic amino-containing resins which contain -OH groups and / or primary or secondary amine groups, (X) being an amine-containing blocked polyisocyanate and the reaction product of a mixture comprising at least one polyisocyanate comprising more than 2 isocyanate groups per molecule; at least one polyol comprising at least three -OH groups per molecule, wherein two of the -OH groups are more reactive towards isocyanate than the other one(s); at least one amine comprising at least one tertiary amine group and additionally at least two groups being reactive towards isocyanate; at least one blocking agent; and at least one neutralizing acid; the at least one amine having at least one tertiary amine group which is laterally pending from the backbone of (X), and the nitrogen atom of the at least one laterally pending tertiary amine group being separated from the backbone of (X) by at least one intervening atom. It also relates to a method for making (XD) and to the use thereof for coating a substrate by cathodic electrodeposition, a coating bath for cathodic electrodeposition, a water-dilutable paint, a method for making the paint as well as to the use thereof.

The application discloses a kind of multistage synergic covalent grafting type hydrolysis-resistant self-cleaning PET submarine cable monofilament and preparation method, the monofilament includes three parts of core layer, skin layer and surface layer, the core layer is the high viscosity polyethylene terephthalate resin containing carbodiimide anti-hydrolysis agent;Skin layer is the modified PET resin of functional polysiloxane covalent grafting, wherein the functional polysiloxane has epoxy end group or isocyanate end group, and main chain has Si-H group;Surface layer is the fluorine-free low surface energy layer formed by polyvinyl long side chain alkane polysiloxane and residual Si-H group in skin layer through hydrosilylation reaction.The application significantly improves the durability of monofilament in humid heat environment, so that it is suitable for long-term humid heat service environment such as marine cable and industrial fabric, and can maintain stable mechanical strength and self-cleaning performance for a long time.

The present invention relates to a monomer having a functional group, a heat-resistant polymer having a rigid main chain using same, and a manufacturing method therefor. Particularly, the present invention relates to a monomer having a pentafluorophenyl group of chemical formula 1, a heat-resistant polymer of chemical formulas 2 and 3 having the monomer of the present invention, and a manufacturing method therefor. According to the present invention, a novel polymer obtained by polymerizing a novel monomer of the present invention has a reactive group of reactive pentafluorophenyl, and thus may exhibit excellent reactivity and enable synthesis of polymers having an excellent polymerization degree by using a polyhydroxyalkylation polymerization method without a protective group. Due to such excellent reactivity, the polymer of the present invention can cause a nucleophilic substitution reaction under mild conditions, and thus an ion-exchange group, such as sulfonic acid or phosphonic acid, can be introduced under mild conditions through such a reaction. In addition, the novel polymer of the present invention has high heat resistance and chemical resistance and good tensile strength, and thus can be used as an engineering plastic. In addition, the novel polymer of the present invention can be imparted with ionic conductivity or other functionalities by introducing a phosphonic acid group or a sulfonic acid group into any one of fluoro positions of pentafluorophenyl of the polymer, and accordingly, may be used as an electrolyte membrane for a fuel cell or water electrolysis. [Chemical formula 1] [Chemical formula 2] [Chemical formula 3]

This invention relates to the field of biomedicine and discloses a composition for treating non-small cell lung cancer metastasis that targets replication stress vulnerability and its application. The composition includes a dual-responsive polymer prodrug, which consists of a block copolymer backbone, a matrix metalloproteinase cleavage peptide sequence coupled to the hydrophilic end, and an active molecular group coupled to the hydrophobic end based on an asymmetric grafting structure. The active molecular group comprises a replication stress inducer and an ATR kinase inhibitor. This invention maintains the amorphous phase of the micelle core through the asymmetric grafting structure, eliminating the permeation barrier caused by spontaneous crystallization of components. This amorphous core provides a proton permeation channel, ensuring the synchronous in-situ release of multiple target drugs, thereby blocking the DNA replication fork repair pathway and inducing mitotic catastrophe, maintaining the spatiotemporal overlap of multiple drug interventions in the pathological target area, and avoiding the risk of drug resistance.

This invention discloses the application of a fluorinated chitosan derivative in the preparation of anti-neuroinflammatory drugs, belonging to the field of biomedical technology. The fluorinated chitosan derivative is the sole active ingredient in the drug. Its structure is a fluorinated acyl chitosan derivative obtained by N-acylation modification of the primary amine group at the C2 position of the chitosan backbone, with the C2 substituent being -NH-C(O)-Rf, where Rf is selected from -CF3, -C2F5, or -C3F7. The degree of substitution of the fluorinated chitosan derivative is 40%, and the weight-average molecular weight is 2-5 kDa. This fluorinated chitosan derivative is used as the active ingredient in the preparation of anti-neuroinflammatory drugs.

A single-ion conducting gel polymer electrolyte includes a fluorine-based compound with 25-40% of its main chain converted to carbon double bonds, and 35-55 wt % of a lithium salt. The polymer ensures anion immobilization, thereby limiting conduction primarily to lithium ions. By including an optional additive such as PEGMEMA in specific weight ratios, the electrolyte achieves both high ionic conductivity and robust film formation. A method for preparing this gel polymer electrolyte involves mixing the fluorine-based compound, lithium salt, and a radical initiator, followed by in-situ crosslinking. The resulting free-standing film exhibits enhanced lithium-metal anode stability, suppressing dendrite formation. Also disclosed is a lithium secondary battery with this gel polymer electrolyte layer positioned between positive and negative electrodes, demonstrating improved cycle life and higher voltage stability disclosure.

Provided is a photocurable resin composition used for producing a three-dimensional formed article by a liquid tank photopolymerization method, the photocurable resin composition containing (A) a radically polymerizable monomer, (B) an inorganic filler, (C) a photopolymerization initiator, (D) an activated light absorbent, (E) a polymerization inhibitor, and (F) a chain transfer agent, wherein: at least 90 mass % of the component (A) has two or more (meth)acryloyl groups in the molecule, and is composed of a polyfunctional (meth)acrylate-based radically polymerizable monomer (a) having 5 to 25 atoms constituting a main chain of a divalent group interposed between the two or more (meth)acryloyl groups; and the component (a) is composed of a polyfunctional monomer a1 having a specific group such as a urethane group and a polyfunctional monomer a2 other than the polyfunctional monomer a1. Also provided is a method for producing a three-dimensional photoformed article by using the photocurable resin composition.