Materials Literature
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Using graft reactive extrusion modification technology,prepared oxazoline functionalized acrylonitrile-butadiene-styrene copolymer(ABS)compatibilizer(ABSm),and prepared PA6/ABS/ABSm blends.Mechanical properties of blends showed that moderate ABSm addition can improve the notched impact strength of blends;when ABSm mas…
By one-pot technique the copolymerization of styrene with ethylene promoted by a cyclopentadienyl titanium trichloride(CpTiCl_3)/1,4-butanediol diglycidyl ether(BDGE)/Zn catalytic system to yield aPs-b-P(S-co-E)b-PE block copolymers was investigated via sequential monomer addition strategy in the presence of methylalu…
Based on density-functional theory and the modified fundamental measure theory for the classical fluid, the equilibrium density distribution of charged hard-sphere fluid confined in parallel plates was studied. By comparing the density distributions in the case of with and without applied electric field, the effect of…
220 kV XLPE cables for urban T D lines or power plant construction are mostly installed in cable trenches.It is not a frequent occurrence that multi-cable lines for power plant construction are installed in a tunnel with several changes of direction.In this case it is very difficult to organize and carry out the insta…
The nano crystalline CuO has been prepaired with the water solution of the copper nitrate and ethanol applied as material,and sodium hydroxide,by means of direct precipitator.The effects of ethanol on the crystalline forms and the grain size are analysed and compaired with techniques of TEM,XRD FT-IR and XPS,and the t…
A 2-135 CI engine was modified to carry out the test for combustion and emission control using internal-external exhaust gas recirculation(EGR) by port aspiration and in-cylinder injection of dimethyl ether(DME).The results show that the overall combustion process comprises HCCI combustion,pre-mixing and diffusion com…
The microstructure of layered colossal magnetoresistance material La1.2xNdxSr1.8Mn2O7(x=0.2) was investigated by X-ray diffraction(XRD),transmission electron microscopy(TEM) and high-resolution electron microscopy(HREM).The results showed that La1.2-xNdxSr1.8Mn2O7(x=0.2) is of tetragonal structure and Nd-doping has no…
Lauric acid ester quaternary ammonium salt cationic surfactant 2-hydroxyl-3-cetyl poloxy cetyl dimethyl ammonium dichloride was synthesized by quaternarization of dedocyldimethylamine in acetone with epichlorohydrine(EPIC) and HDAC.Experiment condition was optimized by the method of orthogonal experiment.The yield can…
Automobile exhaust pollution which attracted the extensive attention and importance was getting worse.Currently,as a fourth-generation auto exhaust catalyst,three-way catalyst involved a wide range of research and recognition in the world.This article elaborated the motor exhaust pollution and its control in China,des…
The phonons dispersion curves of copper step surfaces are studied with lattice dynamics and an analytic embedded-atom method (AEAM). The surface relaxation is calculated with molecular dynamics method. It is found that the phonon disperse curves are in good agreement with the existing experimental data.
Active silicon dioxide was prepared through acid activation of palygorskite,and then it is organically modified by using silane coupling agent(modifier amount is 6%,in mass,the same below).The palygorskite,its acid product and modified silicon di- oxide were analyzed respectively by transmission electron microscope,X-…
The stable amino-silicone emulsion with 10% solid mass fraction was prepared by low viscosity amino silicone oil as raw material,non-ionic surfactant of iso-tridecanol polyoxyethylene ether (1305:1307 by the mass ratio of 1:1 mixture) as emulsifier,emulsifier and amino silicon ratio of 30% and at a pH value of 6~7.
The polyurethane-unsaturated polyester hybrid network(PU-UPE HN) was produced instantly by UV-curing method.Kinetics of UV-curing was investigated and physical properties were measured.Morphology and miscibility of PU-UPE HN were characterized by dynamic mechanical analysis(DMA) and atomic force microscopy(AFM).PU-UPE…
Several most important reactions of the process were analyzed,and the basic laws about the operation parameters on the effect of absorption operation were proposed.Meanwhile, the equilibrium stage model based on reaction rate was developed and used for the actual example of the absorption process of NO_x gas.The calcu…
With the development of research on the frictional properties of the human skin,there was still lack of a suitable friction tester to measure the frictional properties of irregular part of human body,such as cheek,forehead etc. A portable frictional property testing apparatus was designated in this paper and measureme…
Propylene oxide was polymerized with potassium hydroxide as catalyst and 1,2-propylene glycol as initiator.Different improved initiation modes were used in the polymerization.The results showed that higher relative molecular mass and much narrower relative molecular mass distribution were obtained by using the initiat…
Tungsten oxide nanowires sensing film has been prepared successfully by screen printing technology.The structures,micrographs and CO gas sensing properties of the sensing films have been investigated in detail.The results indicate that a high structural stability of the sensing film has been obtained and the crystal s…
MgO-Al2O3-SiO2-TiO2-CeO2 system glass-ceramics were prepared with industrial-grade raw materials using melting method, and the microstructures and microwave dielectric properties of the glass-ceramics obtained at different crystallization temperatures were investigated. The results show that with the increasing of the…
Based on the analysis of the gears' working condition and failure mode,this paper puts forward the requirements on mechanical property of lathe headstock gears,and accordingly selects the metal material.Reasonable machining and heat treatment methods is planed to meet the application requirements.
Objective To study the disinfection properties of hydrogen peroxide silver ion disinfectant.Methods Carrier qualitative germicidal tests were used to observe the germicidal efficacy and stability of hydrogen peroxide silver ion disinfectant.Results The disinfectant containing 100 g/L hydrogen peroxide and 109 mg/L sil…