98 results about "Functionalized polyethylene" patented technology

The invention includes compositions for inhibiting cellular adhesion, methods of preparation of such compositions, and methods for preventing cell adhesion at a surgical site comprising application of such compositions. The compositions generally comprise a cellular adhesion inhibitory agent, such as dextran sulfate, and a crosslinked hydrogel matrix, preferentially physically entrapping the adhesion inhibitory agent. The hydrogel matrix can include a first gel component, such as an electrophilically functionalized polyethylene glycol polymer, and at least one additional gel component, preferably nucleophilically functionalized, and preferentially selected from the group consisting of polyethylene glycol polymers, polypeptides, and polysaccharides. The compositions are useful for delivering the cellular adhesion inhibitory agent to a site in need of adhesion inhibition and providing either immediate or metered delivery of the inhibitory agent.

Curable functionalized imide-linked polyimides compounds have been synthesized that have been found to possess very low dielectric constant and extremely low dissipation factor. These compounds also have a range of high to low modulus, extremely low moisture uptake and are very thermally stable. The combination of these materials in formulation along with functionalized polyethylene, polypropylene, polybutadiens have been found to be ideal for forming films and coatings for the microelectronic applications, multiplayer capacitors and interconnects, and high power cables and wire coatings. The addition of perfluorinated hydrocarbons, and POSS nanoparticles to the formulations have decreased the dielectric constant and dielectric dissipation factor further, and have also improved the flammability of the compositions.

The invention provides novel functionalized polyvinyl alcohol hydrogel capable of adsorbing heavy metal ions and a preparation method of the novel functionalized polyvinyl alcohol hydrogel. The hydrogel comprises functionalized polyvinyl alcohol (PVA), chitosan (CS) and sodium alginate, wherein the weight ratio of the functionalized polyvinyl alcohol to the chitosan ranges from (5:95) to (95:5). The prepared hydrogel has the large adsorption capacity on heavy metal and is high in adsorption speed. The hydrogel is prepared by the following steps: functionalizing the polyvinyl alcohol and completely mixing the functionalized polyvinyl alcohol and the sodium alginate to be dissolved in water; then adding a certain amount of the chitosan and uniformly mixing; and finally, dripping mixed liquid into a calcium chloride-boric acid saturated solution to prepare hydrogel globules. The composite hydrogel provided by the invention is simple in preparation process, strong in operability and stable in performance, can be circularly utilized, has no secondary pollution and is widely applied to the field of heavy metal sewage treatment.

The invention discloses a mono-functionalized polyethylene glycol with a nitrogen atom branched center and its preparation method and biologically-relevant matter. The mono-functionalized polyethylene glycol with a nitrogen atom branched center is shown in the general formula (1). The polyethylene glycol-modified biologically-relevant matter is shown in the general formula (2). X1 and X2 represent alkyl containing 1-20 carbon atoms, n1 and n2 are integers of 2-2000, n3 is an integer of 1-2000, L1, L2 and L3 represent connection groups stably existing under the conditions of light, heat, enzyme, redox, acidic or alkaline condition, R represents a functional group or is in a protected form, D represents a biologically-relevant matter, Z1 represents a connection group, and L4 represents residue formed by a reaction of R and the biologically-relevant matter. The branched polyethylene glycol with the nitrogen atom center can interact with a substrate easily so that the substrate protection based on polyethylene glycol is promoted, the state of the substrate in the human body can be effectively improved and a prospect is wide.

A synthetic composition is provided which includes an acid-functional polymer having at least one pendant acid group, an amine-functional polymer having at least one pendant amine group, and a coupling agent. The synthetic composition can be used in human and animal medical applications as an adhesive or sealant.

The invention provides an anti-cracking low-smoke halogen-free flame retardant polyolefin protecting bush material and a preparation method thereof. The protecting bush material is composed of the following components in parts by weight: 40-50 parts of ethylene-vinyl acetate copolymer resin, 30-50 parts of polyolefin elastic body resin, 10-20 parts of polyethylene resin, 10-20 parts of functionalized polyethylene resin, 180-200 parts of hydroxide fire retardant, 0.5 part of primary antioxidant, 0.5 part of auxiliary antioxidant and 3-5 parts of lubricating agent. The preparation method comprises the following steps of: metering raw materials in a raw material formula according to respective weight part and conveying the raw materials into a kneading machine to be uniformly mixed; conveying the mixed materials into a single screw extruder to extrude and particles; then, vibrating by a vibrating sieve; and finally, packaging and cooling to finish the whole preparation process. According to the anti-cracking low-smoke halogen-free flame retardant polyolefin protecting bush material and the preparation method thereof, disclosed by the invention, standard requirements are completely met; ethylene copolymer resin is used the basic raw material, the polyolefin elastic body resin, a compatilizer and the hydroxide fire retardant are added to be commixed to form the anti-cracking low-smoke halogen-free flame retardant polyolefin protecting bush material.

The invention provides a functionalized polyethylenimine-grafted porous nano-fiber adsorption material and preparation thereof. The functionalized polyethylenimine-grafted porous nano-fiber adsorption material is characterized by being prepared from porous polyacrylonitrile nano-fibers; the porous polyacrylonitrile nano-fibers are grafted with functionalized polyethylenimine after being hydrolyzed. After the porous polyacrylonitrile nano-fiber material is subjected to graft modification by using the functionalized polyethylenimine, the carbon dioxide adsorption performance and adsorption and desorption cycling stability of the porous polyacrylonitrile nano-fiber material are greatly improved; therefore, the porous nano-fiber high-efficient adsorption material with certain flexibility and strength can be prepared, and has great utilization potentiality in the field of adsorption.

The invention discloses a preparation method and application of functionalized polyvinyl alcohol microspheres. The preparation method comprises the following steps: uniformly mixing polyvinyl alcohol microspheres, epoxy chloropropane and a hydrochloric acid solution, carrying out a stirring reaction for 1-5 hours in a water bath, and carrying out centrifuging, water cleaning and drying for later use after the reaction; uniformly mixing the obtained chloridized polyvinyl alcohol microspheres, tetrabutylammonium bromide, ethidene diamine and a sodium hydroxide solution, carrying out the stirring reaction for 4-10 hours in the water bath, and carrying out the centrifuging, ethanol cleaning and the drying for later use after the reaction; and uniformly mixing the obtained aminated polyvinyl alcohol microspheres with 2-(2-pyridine) azo-resorcinol, formaldehyde and distilled water, stirring for 6-18 hours in the presence of nitrogen, and carrying out the centrifuging, the ethanol cleaning and the drying after the reaction, so as to obtain an end product. The functionalized polyvinyl alcohol microspheres provided by the invention can be used for chelating heavy metal and detecting and processing divalent heavy metal ions in wastewater and have the characteristics of simple preparation condition, low cost, short detection response time and high adsorption capacity.

The present invention is directed to the incorporation of functionalized polyethylenes, in amount of about 1% to 95% by weight based upon the weight of the total crosslinkable material, into ethylene alpha olefin elastomers, such as EPDM elastomer compositions, which are crosslinked by peroxides, which results in improved properties, such as hardness and modulus of elongation, and can result in improved higher abrasion resistance, wear resistance, coefficient of friction, tensile strength, and other properties through a broad temperature range, which are beneficial to power transmission products, such as power transmission belts.

The invention relates to a chip of a surface plasmon resonance instrument which is based on polyethylene glycol and a preparation method. The chip comprises a glass film base and a gold plating film on the glass film base; wherein the gold plating film is provided with an initiator layer which is introduced in the way of self-assembly and a functionalized polyethylene glycol layer which is combined with the initiator layer. The invention uses a quartz crystal microbalance to monitor the growth of the film at the surface of the chip at real time and the chip of the invention effectively solves the problem of non-specific absorption of protein. As the surface ornament of the chip is not limited to traditional carboxylic dextran, the density and types of the functional groups at the chip surface are no longer strictly restricted. Furthermore, the chip of the invention also has good performance in terms of the specificity maintenance and quality control of biological signaling molecule and so on. The preparation method of the chip of the invention has few steps and the low manufacturing cost and is more suitable for industrial production. The chip has more potential of deep development and more superior generality.

The presently disclosed and claimed inventive concept(s) relates generally to the functionalized polyethylene terephthalate polymers and functionalized derivatives of PET. More particularly, but not to be construed as limiting, the presently disclosed and claimed inventive concept(s) relate to lower molecular weight functionalized digested PET materials from digesting recycled and methods of making and using same.

The invention discloses a method for preparing high performance graphene-polyvinyl alcohol composite fiber, the method comprises the following steps: 1) functionalization of blocked isocyanate groupsof graphene quantum dots; 2) preparation of a spinning solution of polyvinyl alcohol-graphene quantum dots (PVA-GQD); 3) wet spinning; 4) post-treatment of nascent fibers; the method is simple, shortin process, low in cost and suitable for large-scale production, and does not require modification of existing polyvinyl alcohol wet spinning process equipment, and the prepared PVA-GQD fiber not onlyhas excellent mechanical properties and easy dispersibility, but also has a metallic luster, and is an ideal concrete reinforcement material, packaging material and clothing fabric.

The present invention is directed to the incorporation of functionalized polyethylenes, in amount of about 1% to 95% by weight based upon the weight of the total crosslinkable material, into ethylene alpha olefin elastomers , such as EPDM elastomer compositions, which are crosslinked by peroxides, which results in improved properties, such as hardness and modulus of elongation, and can result in improved higher abrasion resistance, wear resistance, coefficient of friction, tensile strength, and other properties through a broad temperature range, which are beneficial to power transmission products, such as power transmission belts.

Crosslinkable, semiconductive, peroxide-free thermoplastic compositions having a stable volume resistivity of less than 1000 ohm-cm comprise, based on the weight of the composition:

• • A. 60-90 wt % silane-functionalized polyethylene;
  • B. 0.5-20 wt % organopolysiloxane containing two or more functional end groups;
  • C. 10-20 wt % high conductivity carbon black, e.g., a carbon black having an average particle size of 50 nm or less, a surface area (BET) of 700-1250 m²/g, and an oil absorption (DBP) of 300-500 ml/100 g; and
  • D. 0.05-0.2 wt % crosslinking catalyst.

The invention provides terminal group-functionalized polyethylene which is characterized by comprising the following structure as shown in the specification, wherein PE shows a polyethylene chain, and R has a structure shown by a or b; R1 is selected from H, carries or does not carry hetero atoms (such as O, S, P, N, Cl and I) or alkyl of C1-C15 of aryl (such as phenyl). The invention further provides a preparation method of the terminal group-functionalized polyethylene. The terminal group-functionalized polyethylene is abundant in source of active ingredients; the preparation method is simple and convenient and efficient, low in cost, high in product yield, clear in structure, and excellent in performance, and has wide potential application prospects.

The invention discloses a functionalized polyvinyl alcohol adsorbent for managing heavy metal pollution in water. The functionalized polyvinyl alcohol adsorbent is a polymer granule which is prepared from a polyvinyl alcohol-maleic anhydride polymer in modes of swelling and carbonization treatment, wherein the polyvinyl alcohol-maleic anhydride polymer is prepared from polyvinyl alcohol, maleic anhydride and butyl acetate as raw materials. The invention further discloses a preparation method of the functionalized polyvinyl alcohol adsorbent. The absorbing material disclosed by the invention is large in heavy metal absorption capacity, rapid in absorption speed, wide in application range, free of secondary pollution, simple in use method, remarkable in effect, safe and reliable, simple and convenient in preparation process, high in production efficiency and good in product quality, can be recycled and reused and can be produced in large scale.

The invention provides nano-particles modified by alendronic acid functionalized polyethylene glycol. The nano particles are calcium phosphate particles or calcium carbonate particles wrapped with target delivery matters; the target delivery matters are selected from DNA, siRNA and protein acromolecular drugs or micro-molecular chemical drugs; alendronic acid functionalized polyethylene glycol covers the surfaces of the nano particles; and the particle size of the nano particles modified by alendronic acid functionalized polyethylene glycol is 20-50 nm. The nano particles modified by alendronic acid functionalized polyethylene glycol are small in particle size; polyalendronic acid-polyethylene glycol can stably cover the surfaces of phosphate-genetic particles, and therefore, the nano particles can be effectively stabilized for a long time; the body circulation time is prolonged; the nano particles disclosed by the invention are low in cost and toxicity, safe and effective. The invention further provides a preparation method of the nano particles modified by the alendronic acid functionalized polyethylene glycol.

A combination of nanoparticles is disclosed comprised of amine functionalized polyethylene glycol in which one particle with a fluorescent donor dye having one wavelength excitation maximum and at least one additional particle with a second fluorescent dye having a second, higher wavelength excitation maximum, the particles having the same or different biomolecule targeting moieties bound to their external surfaces.

The invention provides an ageing resistant polyester modified material. The ageing resistant polyester modified material is prepared from the following raw materials by mass percentage: 80%-99.7% of polyester, 0.1%-10% of end group functionalized polyethylene glycol, 0.1%-5% of mono alkoxy polyethylene glycol or polypropylene glycol modified poly carbodiimide, and 0.1%-5% of additive. Compared with the prior art, the polyester modified material prepared by the method or the finished product prepared by the polyester modified material has better hydrolysis resistance, before the ageing resistant test of the polyester material, the content of the terminal carboxyl is 0-20eq/t, after ageing resistant treatment, the breaking elongation retention of the polyester is still high, and other properties of the polyester are ideal; no gas harmful to human health is generated in the production process, the viscosity of the melt is not increased so as not to cause difficulty in process, and no low molecular weight material is found to migrate and exude when the product is used.

The invention discloses a hydroxy functionalized polyethylene and a preparation method thereof. The hydroxy functionalized polyethylene is characterized by comprising telechelic hydroxy polyethylene and polyhydroxy polyethylene; the polyhydroxy polyethylene is characterized in that hydroxyls are positioned at head and tail ends of a polyethylene molecular chain and in the molecular chain. The method includes: (1) hydrogenating high-cis-1,4-hydroxyl-terminated polybutadiene to prepare telechelic hydroxy functionalized polyethylene; (2) hydrogenating polyhydroxy polybutadiene liquid rubber to prepare polyhydroxy polyethylene. The hydroxy functionalized polyethylene is rich in raw material source and adjustable in position and quantity of hydroxyls, the preparation method is simple, convenient and efficient, and structural clearness, excellent performances and extensive application prospect are realized.