40 results about "Helical polymer" patented technology

The invention discloses a propargyl urea monomer in the macromolecular material domain, which is characterized by the following: group R1 and R2 in the structure formula (1) of propargyl urea monomer are the same or different, which are aromatic radical or alkyl; the number average molecular weight of structure formula (2) of propargyl urea monomer is 6800-136600 and the molecular weight distribution index is 1.34-2.91 with 100 percent sym-form structure. The making method comprises the following steps: adding secondary amine drip at 3:1 rate in the organic solution of solid phosgene; heating to reflux for 10-30h; cooling; removing organic solvent through boiling to produce carbamyl chloride; reacting carbamyl chloride and propargyl amine at 1:1 rate for 2-5 h; neutralizing through alkali after acid cleaning; dewater; boiling out carrene to produce propargyl urea monomer; solving propargyl urea monomer and transition metal accelerant at 50:1-100:1 rate in the organic solvent protected by nitrogen; blending two solutions to polymerize for 2-24 h at -15-30 deg.c; adding skellysolve B; settling; filtering; drying in the vacuum. The invention can produce polymerization with more ideal molecular weight and molecular weight distribution, which can be used in optical, biological and medicine domain.

A concrete batch plant is disclosed including a frame and a transit mixer drum having an open end and a closed end. The drum is configured to be utilized both with the concrete batch plant and on a transit mixer truck. The drum may be pivotally coupled to the frame of the concrete batch plant for movement between a first position in which the open end is positioned to receive cement from a cement supply and to receive aggregate from an aggregate supply and a second position in which the open end is positioned to discharge the mixed cement and aggregate. Further, the drum may be a polymeric drum including an interior surface formed by a plurality of complementary molded helical polymeric sections joined along a helical seam.

The invention relates to a preparation method for chiral magnetic microspheres containing a substituted acetylene polymer, which belongs to the field of functional polymer materials. The method comprises the following steps: preparing ferriferrous oxide nanoparticles by using coprecipitation and modifying the ferriferrous oxide nanoparticles by using the silane coupling agent KH-570 to obtain ferriferrous oxide nanoparticles with double bonds on their surface; carrying out coordination polymerization on alkyne monomers containing double bonds and chiral alkyne monomers under the catalysis of the metal catalyst of rhodium so as to obtain macro-molecular spiral monomers; and adding the macro-molecular spiral monomers, the ferriferrous oxide nanoparticles with double bonds, alkene monomers, an initiator and a cross-linking agent into an aqueous solution containing a suspending agent for suspension polymerization so as to obtain the chiral magnetic microspheres. A spiral polymer in a system of the invention has remarkable optical activity, and magnetic particles have magnetic responsibility; therefore, the microspheres have both optical activity of the spiral polymer and magnetic responsibility of the magnetic particles, having double functions, and have an important application value in the fields of chiral separation and chiral catalysis.

The invention relates to a preparation method of a disulfide bond cross-linked C3 polypeptide supermolecule helical polymer. C3 polypeptide monomers can form the supermolecule helical polymer through layer-by-layer self-assembly in a tetrahydrofuran solution, and a disulfide bond can be obtained through sulfydryl crosslinking on an oxidation polypeptide side chain to obtain the disulfide bond cross-linked C3 polypeptide supermolecule helical polymer. The assembly chirality of the disulfide bond cross-linked C3 polypeptide supermolecule helical polymer is not greatly changed along with increasing of temperature within a certain temperature interval; the assembly can stably exist and keeps a left-hand helical structure under a good solvent. The supermolecule helical polymer has the advantages of being easy to synthesize, reliable in chirality and stable in structure, and can be applied in the fields of chiral recognition, chiral separation, asymmetry catalysis and the like.

The invention provides an oxidized helical conformation inverted thioether side chain-containing isocyanide spiral polymer and a preparation method thereof, and belongs to the technical field of polymer synthesis. The polymer provided by the invention has a repeating unit of the structural formula represented by Formula I in a molecular structure, the formula is shown in the description, wherein Ris an alkyl and benzyl, and n is an integer of more than or equal to 10. The thioether structure-containing polymer synthesized by the invention is of a spiral structure and has redox stimuli responsiveness. Due to the presence of S atoms, the polymer can be oxidized by an oxidizing agent to achieve redox irritation. Such thioether structure-containing polyisocyanide spiral polymer can be used inthe fields of chiral recognition, chiral separation, chiral signal amplification, asymmetric catalysis and the like.

The invention discloses a method for constructing a spiral immunization assembly sensor for determining neomycin, belonging to the technical field of material chemistry. The method comprises the following steps: preparing a water-soluble spiral polymer, modifying the spiral polymer with semi-antigen, coupling gold nano particles with antibody, and constructing a neomycin sensor. The invention provides a water-soluble spiral polymer, that is, poly(4-isocyano-benzoic acid). According to the invention, by immunization identification (neomycin semiantigen modified spiral polymer) and gold nanoparticle (coupled with antibody) assembly, the circular dichroism spectrum (CD) signals generated by the assembly detect the neomycin.

The invention provides a controllable synthesis method for stereotactic polymethylmethacrylate. The controllable synthesis method comprises the following steps: step 1: taking microcrystalline cellulose as a matrix raw material and 3,5-dimethylphenylisocyanate as a derivatization reagent and synthesizing a helical polymer cellulose-tri(3,5-dimethylphenylcarbamate) through a traditional esterification method; and step 2: taking the cellulose-tri(3,5-dimethylphenylcarbamate) synthesized in step 1 as a chiral inducing agent and adding into methyl methacrylate free radical polymerization reactionto finally prepare the stereotactic polymethylmethacrylate. The controllable synthesis method provided by the invention has a clear and feasible synthesis route and a mature technology, is simple to operate, has a few conditions needing to be controlled and is easy to realize, so that the controllable synthesis method can be used for large-scale batch production; the cellulose, methyl methacrylateand azobisisobutyronitrile, which are used in the controllable synthesis method, have a wide source and are cheap and easy to obtain; and a whole controllable process is simple, mature and easy to control.

The invention relates to a spiropolymer emulsion, which belongs to the field of high molecular materials. A preparation method for the spiropolymer emulsion comprises the following steps: firstly dissolving a surfactant in the deionized water to form a surfactant solution, controlling the temperature to be between 0 and 5 DEG C, and carrying out the stirring at the stirring speed of 300 r/min to 700r/min; and intensively dissolving proparagyl monomers shown by the right formula(I), wherein R represents alkyl, and a hetero ring or aryl or phenylacetylene monomers shown by the right formula(II) in an emulsification promoter, dropping the emulsification promoter into the surfactant solution, stirring the solution for 20 minutes under the protection of nitrogen so as to form a mixed solution, intensively dissolving a metal rhodium catalyst in the emulsification promoter, then dropping the emulsification promoter containing the metal rhodium catalyst into the mixed solution, carrying out the stirring reaction for 0.5 to 5 hours so as to obtain the orange yellow spiropolymer emulsion.

The invention provides a process for producing spiral polymers controlled in the direction of spiral winding easily from inexpensive general-purpose polymers; and spiral polymers controlled in the direction of spiral winding. The invention relates to a process for the production of syndiotactic polymethacrylate- or polyacrylate-type spiral polymers controlled in the direction of spiral winding which comprises dissolving a syndiotactic polymethacrylate- or polyacrylate-type polymer and a chiral compound in a solvent preferably under heating, subjecting the obtained solution to cooling or concentration to form a solid matter, and separating the solid matter; and so on.