Materials Literature
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The mechanism, choice of catalysts and process condition for transesterification and polycondensation of diphenyl carbonate (DPC) with bisphenol A(BPA) for synthesis of polycarbonate (PC) were reviewed and prospects in transesterification polymerization were discussed. Transesterification of DPC and BPA is of reversib…
1.РаковЭ.Г.Химияиприменениеуглеродныхнанот-рубок//Успехихимии.2001.№70.С.934–973.2. Holland B.T., Blanford C. F., SteinA.Synthesis ofmacroporousmineralswithhighlyorderedthree-dimensionalarraysofspheroidalvoids//Science.1998.№281.P.538–540.3. Model filled polymers. V. Synthesis of crosslinkedmonodisperse polymethacryla…
The clusters(Br2BN3) n(n=1～4) have been optimized at the B3LYP/6-311 + G* level.The structures and properties are obtained.All the cyclic clusters contain B—N—B linkage.The relationships between geometrical parameters and degree of polymerization n are discussed.Their IR spectra are obtained and assigned by vibrationa…
The protection service lives of oil-resistant electrostatic conductive epoxy coatings with different thicknesses were studied by electrochemical impedance spectroscopy (EIS) and macroscopic morphology observation after immersion in accumulated water from crude oil storage tank at high temperature (80 °C) and room temp…
With five kinds of inorganic fillers(such as Al2O3,Si3N4,BN,SiO2 and AlN) as thermal conductive fillers of epoxy resin(EP) encapsulating adhesive,so influences of some factors(such as the types,size and shapes for the fillers particles) were investigated on the thermal conductivity of EP encapsulating adhesive.The res…
By using hydrogen peroxide and formic acid as oxidation system,performance of the oxidation of dibenzothiophene in simulative diesel by H2O2/HCOOH system was investigated.Oxidative desulfurization rate of dibenzothiophene was up to 98% under the conditions of reaction temperature 50℃,reaction time 1h,V(H2O2) :V(HCOOH)…
Mesoporous silicas of AMS-8-NH2 have been synthesized with the anionic surfactant N-myristoyl-Lglutamic acid sodium(C 14 GluA-Na) and 3-amino propyltrimethoxy silane(APS) as co-structure-directing agents(CSDA) .The materials were characterized by powder X-ray diffraction(XRD) ,N 2 adsorption/desorption analysis and 29…
In this work,magnesium hydroxide with high purity,uniform morphology and particle size was synthesized via direct precipitation method using bischofite and NaOH solution as raw materials,NaCl solution as assistant additives.The influence of synthesis parameters on purity,the particle size and filtration property of ma…
The stable ZnS nano materials dispersed in cyclohexane and toluene were firstly obtained by the oil-water interface method using zinc stearate and sodium sulfide as Zn-source and S-source,respectively.And effects of the organic solvent.Zinc sources,and concentration of oleic acid were also investigated.Meanwhile.ZnS:M…
The oxidation of MWCNTs by mixed acid with the proportions of 1 v nitric acid and 3 v sulfuric acid is characterized by SEM,XRD,Raman and XPS.The results show that MWCNTs can be cut into short lengths and impurities can be removed in mixed acids.The treatment did not damage the structure of MWCNTs,but the degree of de…
Optimize the molecular structure of guanine with B3LYP/6-31G,the result show that the molecular is a planar structure.Searching the transition state of guanine reacted with hydroxyl radical under UB3LYP/6-31G.Internal reaction coordinate(IRC) calculation was carried under the same theoretical level.The result show tha…
This paper states that the use of anhydrous aluminium chloride is favorable to the energy saving, emission reduction and quality control of aluminum electro-analysis by comparing different technologies. anhydrous aluminium chloride is a new-generation high property produ ct, which stands for the development tendency.
ULHV (ultra-low heating value) gases are numerous in variety and exist in extremely huge quantities. To ignite ULHV methane at a concentration from 1% to 5% is very difficult and its direct emissions to the atmosphere will cause pollution to the environment. The catalytic combustion is deemed as the most effective met…
The preparation process of nano modified industrial corrosion protection coating was introduced,including the preparation and characterization of a series of products regarding nano concentrated slurry,nano modified epoxy sealer,nano modified epoxy micaceous ferric oxide intermediate coating and fluorine containing na…
Effect of phosphorus slag on strength and hydration properties of high belite cement was studied by X-ray diffraction,differential thermal analysis,and mercury intrusion porosimetry.The results show that the strength of high belite cement decreases with increasing of phosphorus slag amount.The reducing range at early…
Diatomite/natural rubber blends(DMT/NR) were prepared using epoxidized natural rubber latex as a modifier for diatomite interface.Curing property,physical and mechanical properties and temperature rise property were investigated.The results showed that the scorch and top optimum cure time were increased firstly,then d…
The property of pre-oxidation fiber and carbon fiber which are suitable for fabricating the carbon fiber preform in needling process was studied,and the property of felt preparation and needling was compared.After carbonization,the tensile strength of pre-oxidation fiber is only 2 000 MPa,which is lower than the carbo…
The nickel compounds precipitated by homogenous precipitation with urea,fast precipitation with ammonium carbonate,or interface induced precipitation with solid oxalate acid,respectively,and their pyrolysis products,are all used for investigating their particle size distribution and morphology.It is found that the pre…
β-SiC whiskers grown on the Si substrate are prepared by chemical vapor deposition with Ni film as catalyst,CH_4,SiH_4 as the reactive gas,H_2 as carrier gas.The effects of catalyst thickness on the SiC whisker morphology, structure and chemical composition are studied using X-ray diffraction and scanning electron mic…
The films of pure magnesium and AZ61 magnesium alloys were prepared in solution containing acid phosphate,and then were sealed in water or an alkali solution or a vanadic salt solution.The sealed films were studied by using drip tests,porosity tests and seawater immersion tests.And microscopy morphologies of the films…