摘要:
A styrene resin composition is provided which has a high molecular weight enabling a molded product obtained therefrom to have satisfactory strength, has a high melt mass-flow rate, high melt tension, and hence excellent moldability, and is less apt to gel during production, and a process for producing such a styrene resin composition. The styrene resin composition comprises a linear polystyrene having a weight average molecular weight of 200,000 to 350,000 and a multibranched polystyrene having a weight average molecular weight of 1,000,000 to 10,000,000, has an average molecular weight of 250,000 to 700,000, and a melt mass-flow rate (MFR) and melt tension (MT) which satisfy the following formulas (1) and (2) respectively: MFR≧45×exp(−0.1×Mw×10−4) (1) MT≧0.07Mw×10−4+1.8. (2)
摘要:
The three-dimensional periodic structure of the present invention comprises a matrix made of an inorganic oxides in which core-shell particles are disposed so as to contact with each other, the core-shell particles each comprising a core portion made of a fine particle and a shell portion made of a crosslinked hydrophilic organic polymer backbones, wherein the hydrophilic organic polymer backbones and the inorganic oxides hybridize into an organic/inorganic a composite.
摘要:
An object is: to provide a novel, generally applicable polymerization initiator which can be prepared easily and which is highly stable, for application to the production of polymers and block copolymers of .alpha.,.beta.-unsaturated carboxylic acid esters; to polymerize .alpha.,.beta.-unsaturated carboxylic acid esters using the polymerization initiator; and to provide a novel, generally applicable production process for polymers and block copolymers of .alpha.,.beta.-unsaturated carboxylic acid esters having high molecular weight and little discoloration, by which active hydrogen-containing monomers can be polymerized. This is achieved by a novel production process involving polymerization of various .alpha.,.beta.-ethylenically unsaturated carboxylic acid esters using as a polymerization initiator a polymer containing a tertiary amino group obtained by the polymerization of an .alpha.,.beta.-unsaturated carboxylic acid ester containing a tertiary amino group, in the presence of a trivalent phosphorus compound.
摘要:
Provided are a composite of nanoparticles of a metal such as gold, silver, a platinum metal, or copper, and a polymer, the composite allowing formation of a metal film having a sufficiently low resistivity in terms of practicality simply by drying at room temperature without requiring any special heating-baking step or any step of removing a protective agent with a solvent; a dispersion liquid of the composite; methods for producing the foregoing; and a plastic substrate formed from the dispersion liquid. The composite comprises a (meth)acrylic-based copolymer having, as side chains, a polyethylene glycol chain and a phosphate residue represented by —OP(O)(OH)2 and having, at at least one end of the molecular chain, —SR (where R represents an alkyl group or the like).
摘要:
The invention discloses 1-butyl-2-hydroxyl aralkyl piperazine derivatives and their use as antidepressants. The derivatives of the present invention have triple inhibition effect on the reuptake of 5-HT, NA and DA, and can be administrated to the patients in need thereof in form of composition by route of oral administration, injection and the like. Compared with clinically currently used dual targets antidepressants (such as venlafaxine), said derivatives may have stronger antidepression effect, broader indications, faster onset and lower neurotoxicity and side reaction; and said derivatives have stronger antidepression activity, lower toxicity, higher bioavailability, longer half life and better druggablity, compared with aryl alkanol piperazine derivatives and optical isomers thereof disclosed in prior art. The 1-butyl-2-hydroxyl aralkyl piperazine derivative is the free alkali or its salt of a compound of formula below:
摘要:
A highly versatile material for mid-infrared filters is provided by precisely controlling the absorption intensity of titanium oxide in an infrared region. A rutile-type titanium oxide crystal is produced by a method including a step (I) of dispersing or dissolving a complex of an amino group-containing basic polymer and a transition metal ion in an aqueous medium, a step (II) of obtaining a composite having a polymer/titania layered structure in which the complex of the amino group-containing basic polymer and the transition metal ion is sandwiched between layers of titania, by causing a hydrolysis reaction between the aqueous dispersion or aqueous solution prepared in the step (I) and a water-soluble titanium compound in the aqueous medium, and a step (III) of calcining the composite having the layered structure in an air atmosphere at a temperature of 650° C. or higher to dope a surface of a titanium oxide crystal with the transition metal ion and simultaneously to cause growth into a rutile-type crystal phase. The thus-obtained crystal can be used for mid-infrared filters.
摘要:
A furniture cover is configured to encase furniture to prevent the egress of insects through the furniture cover. The furniture cover includes an aperture through which furniture may pass into the furniture cover. The aperture has a closure mechanism disposed along the edges and can be sealed by an operating mechanism operating on the closure mechanism. An operating mechanism cover seals an end of the closure mechanism by way of two fastening surfaces and a compressible insert.
摘要:
This invention relates to a system and method for measuring an object of interest (101). According to the invention, the system comprises a frame (120) having a plurality of holes (121) arranged in known positions and extending in known directions, each of the holes being arranged to cooperate with a rod (130) comprising a sensor (132); and the system comprises means (140) for measuring the position of each of the sensors (132) when the rod is inserted in the hole (121) and the sensor (132) is in contact with the surface of the object of interest (101). Furthermore, the system comprises a processor (150) for deriving the shape of the object of interest, based on the positions of the plurality of sensors.
摘要:
Disclosed is a method for producing a silver-containing nanostructure which can reduce the time required for a post treatment step and the amount of a waste material and which is achieved by the application of the reduction reaction of silver oxide; and a silver-containing nanostructure having a specific structure, which can be produced by the method. Specifically disclosed is a method for producing a silver-containing nanostructure, including dispersing a polymeric compound in which a hydrophilic segment is bonded to a polyalkyleneimine chain in a medium, adding silver oxide thereto, and carrying out a reduction reaction of the silver oxide, thereby obtaining a silver-containing nanostructure. In the method, a structure having a branched structure can be produced when a specific compound is used as a complexing agent. The silver-containing nanostructure thus produced can be used as a conductive paste or the like.
摘要:
An organic/inorganic composite coating film comprising an inorganic material as a matrix and an organic material combined therewith. The coating film has a regular hollow structure therein, and the coating film surface has a rugged pattern with semispherical protrusions. Also provided is a large-area structural color film obtained by burning the composite coating film. The organic/inorganic composite coating film is obtained by applying an aqueous coating composition comprising a metal alkoxide, an aqueous dispersion of monodisperse polymer particles, and an acid catalyst to a substrate and curing the coating composition. Burning the organic/inorganic composite coating film gives the structural color film.