Materials Literature
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In this study an aluminum ammonium cationic starch(ACS) was prepared with water solvent method,using ordinary cationic starch(CS),diallyl-dimethyl ammonium chloride monomer(DADMAC),and aluminum sol as raw materials,and cerium ammonium nitrate(CAN) as initiator.The influences of the initiator dosage,monomer content,rea…
Investigation on effects of hydrogen addition fraction on combustion and emission characteristics of SI gasoline engine was performed on a modified SI engine equipped with an electron-controlled hydrogen port-injection system,under the conditions of the excess air ratio of 1.1 and engine speed 1 400 r/min.The hydrogen…
In alkaline medium,a novel 3,3'-(biphenyl-4,4'-diyl)dipentane-2,4-dione-bridged di-copper(Ⅱ) complex,[Cu2(C22H20O4)(C15H11O2)2](C15H11O2=1,3-diphenylpropane-1,3-dione anion;C22H20O4=3,3'-(biphenyl-4,4'-diyl)dipentane-2,4-dione dianion),was synthesized and characterized by the element analysis,conductivity,infrared spe…
Performance requirements of plaster tablet mask paper were introduced,and described plaster tablet mask paper's technology key points and frequently questions's solutions in practice.
It was indicated that the plasticizing property of PVC-U couldn't be used to evaluate its processing property.Relationship between the melt viscosity of PVC-U with its melt strength was discussed as well as influencing factors on the melt strength.Reasons for that the plasticizing torque was more suitable for evaluati…
The glass fiber(GF) was corroded in the diluted acid solution for different times,and subsequently the GF/isotactic polypropylene(iPP) composites were prepared.The effects of the acid corroded GF on the interfacial morphology of GF/iPP composites were studied via the polarized optical microscope.The result show that t…
In order to study the nano-SiO2 of high-performance concrete workability and the mechanics properties of nano-SiO2,adding the nano-SiO2 to the high performance concrete,through the contrast test of basic concrete,fly ash concrete,nano-SiO2,fly ash concrete,so study the effect of nano-SiO2 of high-performance concrete…
Copper and zinc were used to replace silver and co-permeated onto the surface of AISI304 stainless steel via glow discharge plasma metallurgical route.The morphology and composition of the co-permeated coating were analyzed by means of scanning electron microscopy and energy dispersive spectrometry.The corrosion resis…
A water-borne polyurethane composite modified by acrylate and organosilicon was synthesized using polytetramethylene glycol(PTMG) and isophorone diisocyanate(IPDI) as raw materials,the preparation condition included that R was 2.5;molar content of DMPA was 6%;and the molar ratio of PU to PA was 8∶ 2.The effect of the…
The powders for reactive thermal spraying(RTS) were synthesized by heat treatment at 900 ℃ for 2 h and crushed using Mo powders,FeB powders,Fe powders and Al powders as raw materials and PUB solution as binder.Cermet coatings were prepared by RTS on Q235 steel surface and heat treated at 1 000 ℃ under vacuum for 5 h.M…
The effects of heat treatment process parameters on the microstructure and mechanical properties of low carbon high chromium white cast iron was analyzed by orthogonal test.The heat treatment process parameters were also optimized.The results show that the important order of the factors that affect the hardness of low…
Effects of the types and content of inorganic hydroxides,synergistic flame retardants(red phosphorus and zinc borate),carbon black and plasticizing agent(paraffin oil) on the combustion characteristic of EPDM were systematically researched by using Cone Calorimeter,and the morphologies of combustion products were also…
The necessary conditions of maximum distribution coefficients of mixed ligand coordination compounds were deduced as nA = a and nB = b,where nA and nB are average coordination numbers of mixed ligand coordination compounds to ligand A and ligand B respectively.The extreme values of MAaB n-a type mixed ligand coordinat…
Fe-MCM-41 molecular sieves were synthesized and used as the catalyst for oxidation of cyclohexane to prepare cyclohexanone.With oxygen as oxygen source,under 2.5 MPa,influence of factors such as temperature,air flow and space velocity were investigated.The results show that under the conditions of 160 ℃,air flow rate…
Based on reducing technology of the mini-stretch reducing mill,the recducing process was simulated with ANSYS/LS-DYNA.Stress field and strain filed were obtained by numerical simulation.The rolling force was analyzed on the basis of the measured results.Simulated results are a good agreement with the actual results.Th…
The corrosion behavior and the electrochemical performance of NZ30K alloy of as-cast(F) and solution-treatment conditions(T4),and AZ31 alloy of as-extruded condition were investigated in MgCl2,MgSO4,Mg(COOCH3)2 and MgBr2 solution with different molar concentrations by means of immersion test at constant temperature,al…
The separation and the analytical process for clarifieation of the composition of an unknown surface modification additive,inorganic filling,ACR and sealant are reported in this paper.It has shown that the IR spectrometer and GC/MS are effective and practical tools in the analysis of plastic additives composition with…
Polydiaminonaphthalene(PDAN),as a conductive polymer,will become a novel functional material owing to its unique properties and potential applications.The electrochemical properties and structure of poly(1,5-diaminonaphthalene)(P1,5-DAN)prepared by electrochemical process are summarized.Combination of P 1,5-DAN with o…
The shape and the reasons of surface hot tears in the thin-wall steel castings produced by furan resin sand process were elaborated.The influence of the tears on the fatigue life was researched through experiments so as to provide a reference for the safe use and repair of the castings.
This paper studied the carburizing of chromium molybdenum steel which the heat treatment effect of gear geometric tolerance, OPD, Runout, the surface hardness, the maximum hardness, the core hardness and the bending fatigue strength were investigated. Firstly, the deformation is observed, and the results of circularit…