Materials Literature
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The reactivity and viscosity behavior of BMI resin was measured,and then rheological property was studyed.The initial temperature、peak temperature and terminate temperature obtained from DSC analysis were 202 ℃、266 ℃ and 320 ℃ respectively;Arrhenius equation showed that activation energy was 58.1 kJ/mol.Viscosity-temp…
The process and performance of polyaspartic acid were discussed by using various catalysts.The result showed that phosphorus acid as catalysts can reform color appearance and improve molecular weight of PASP.The orthogonal test results showed that the rate of maleic anhydride and salvolatile of 1 ∶ 1.2,2.5% of phospho…
Polypyrrole/graphene oxide composite and polypyrrole electrode were prepared by direct current polymerizationin aqueous solution.Polypyrrole/graphene oxide composite electrode exhibits porous appearance with hollow horns,which can result from polymer forming around the sphere composed of graphene oxide and p-toluene s…
TiO2 films with different structure properties were prepared with varying sputtering power from 100 W to 500 W.Film surface morphology,structure,and optical properties were measured with step profiler,AFM,X-ray diffraction,FTIR,UV-VIS transmittance spectroscope and ellipsometry respectively.The influence of the sputte…
Based on the microstructure and properties calculated by Jampro software,the heat treatment technique of ERW N80 oil casings steel was made and its effects on the microstructure and properties were studied.The results show that the microstructure with polygonal ferrites and lath bainites in the testing steel is obtain…
Using two kinds of molybdenum powder with different particle sizes and adding additives with different radio,the infiltrating porous molybdenum skeleton was prepared by pressing and sintering.The microstructure of porous molybdenum skeleton was observed by Scanning Electron Microscopy(SEM).The effect of Mo mesh size,a…
Different knitted fabrics were seamed in different warp and weft directions and by different stitches,and their process shrinkage rates were measured respectively.Based on a discussion about the relations between shrinkage rate and the raw materials,warp and weft directions as well as the seams,the paper suggested a m…
Using in situ polymerization process,polymethylmethacrylate(PMMA) binding agent was obtained on NdFeB magnetic powders,and PMMA/NdFeB bonded magnets were prepared.Infrared spectroscopy was employed to analyze the polymerization products.Structure,hardness,mechanical properties and magnetic property of the bonded magne…
Visco-elastoplastic properties of hot rolled asphalt mixture HRA20 at high temperatures and under low stress levels are studied experimentally using creep and recovery tests.Experiment results reveal that rise of the temperature will lead to much stronger responses of visco-elastoplasticity of asphalt concrete to the…
Condensate recycling of steam heating system is an important part of energy saving.Combining the large electric furnace heating condensate recovery system project of Nantong Baosteel Iron Steel Co.Ltd.,this paper do a preliminary analysis and discussion to the Condensate Recycling of steam heating system which can be…
The interactions of cucurbit[n]urils with aniline derivates,such as aniline,o-phenylenediamine,m-phenylenediamine and p-phenylenediamine,were investigated by fluorescence spectrophotometry.The cucurbit[8]urils always formed the complexes at mass ratio of 1∶2 with aniline derivates.The cucurbit[7]urils formed the compl…
A series of different generation hyperbranched waterborne polyurethanes(HPUs) was synthesized successfully from toluene 2,4-diisocyanate(TDI),dimethylol propionic acid(DMPA) and diethanol amine(DEOA) via monomer coupling reaction.The strutures of the HPU products were characterized by FTIR and NMR;The molecular weight…
It designed questionnaire survey for middle-aged person and old person of North China to investigate the consumption situation of wool shirt,used SPSS 11.5 to do factor analysis and frequency analysis for survey result,then it analyzed the retional factor and perceptual factor influencing the consumption,such as the c…
Polyaniline was prepared using chemical method,then the product was deprotonated in the excess of ammonium hydroxide to yield the corresponding polyaniline base,at last the polyaniline base was redoped using tartaric acid.The influencing factors including reaction molar ratio of polyaniline/tartaric acid,reaction time…
We present the simple designs of metamaterial absorbers which are composed of periodic array of the electric resonance ring,FR4 substrate,and short wires.The metamaterials can provide the electric and magnetic resonances overlapping in the given frequency range.By use of the numerical simulation method we computed the…
This article has described the main applications of silicon carbide foam ceramics.The traditional and new preparation methods of silicon carbide foam ceramics are introduced.The prospects for silicon carbide foam ceramics are explored.
Cadmium chloride,zinc chloride and sodium sulfide were employed as raw materials to fabricate water-soluble CdxZn1-xS nanocrystals in the presence of thioglycollic acid(TGA) as surface modifier.The structure and properties of these nanocrystals were studied by X-ray diffraction(XRD),Transmission Electron Microscope(TE…
The mechanic properties,toughening mechanism and compatibility of the system of polyphenylene sulfide/maleic anhydride grafted high-density polyethylene/Epoxy resin-44(PPS/HDPE-g-MAH/E-44) were studied.Thermal behavior of the blends was characterized by DSC.The results showed that the compatibility of PPS and HDPE-g-M…
Ester-tin(methyl acrylate) was synthesized by mixing solvent method with phase transfer catalyst.The results show that the optimal reaction time is 5～6 h,the optimal reaction temperature is 53～58℃ and the concentration of Na2CO3aq.used is 20%.The product synthesized by the proposed above method can still keep clear wi…
Ni-P-SiC composite plating coating was prepared on the surface of AZ91D magnesium alloy by electroless composite plating.The microstructure and phase structure of the coating were analyzed using scanning electron microscopy and X-ray diffraction.The electrochemical test and wear resistance test were performed.The resu…