Search results

Therefore, in this work, a novel IFR, MEHL for EPDM was synthesized (Scheme 1) and its structure was studied by fourier transform infrared (FTIR) spectra.
The surface of residual char of sample filled with pure EHL in graph 2 contained little slippery part and a kind of foam structure, which may resulted in the gas source decomposed and released.
Graph 3 pointed out that the residual char of sample adding with the MEHL is thick and continuous which was a typical intumescent char structure, owing to char-formation effect of the composite as char source.
Friedman: Principles of fire protection chemistry and physics (Jones and Bartlett Publishers, Canada 1998) [6] M.

Study on the densification process of the high density graphite materials Chengrui Di 1,2,a, Chengguo Wang1,b,Kun Qiao1,c,Xiangyu Yin1,d, Xiaodong Gao1,e 1Key Laboratory for Liquid-Solid Structure Evolution & Processing of Materials Ministry of Education, Shandong University, 73 Jing Shi Road, Jinan, Shandong Province, P.R.CHINA. 250061 2Carbon Fiber Technology Research Center of School of Materials Science and Engineering, Shandong University, 73 JingShi Road, Jinan, Shandong Province, P.R.CHINA. 250061 adcr0918@hotmail.com, bwangchg@sdu.edu.cn, cqiaokun08@gmail.com, dabcyinxiangyu@163.com, egxd19870101@yahoo.com.cn Keywords: Green Petroleum Coke, Roasting, Impregnation, Pitch, High Density Abstract.The densification process is the key step in the producing of the high density graphite materials.
Employing green petroleum coke could increase the comprehensive properties of products, simplify the craft and prevent the organization structure of material being loose during high temperature procedure, which is caused by the evident difference of shrinkage degree between aggregate and binder, for green petroleum coke exhibits the characteristic of both aggregate and binder[3,4].
Surface structure pore reducing as the increasing of roasting and impregnation times, meanwhile, the coke bodies become more and more dense.
There are complex chemistry reactions within green coke, abundant volatile matter eliminate from the coke between 200℃ to 600℃.

Control Dominant Factors Analysis for Under-actuated Vehicle Platoon Stability System Ronghui Zhang1, 2,3,a, Tao Liu 2,b, Yulong Pei 3,c ,Sanqiang Yang 4,d 1Xinjiang Academy of Communication Science, Urumqi 830000, China 2School of Transportation Science and Engineering, Harbin Institute of Technology, Harbin 150090, China 3Xinjiang Technical Institute of Physics & Chemistry, Chinese Academy of Sciences, Urumqi 830011, China azrh1981819@126.com, bL_Tao2000@163.com, cyulongp@263.net,dysq0999@126.com Keywords: Intelligent transportation system, Multi-agent, Under actuated physics system, Robust optimal control, Vehicle Dynamics.
To maintain sensitive steering properties of steering system, the mathematics model of the steering structure must be considered during the controller design process, the function of steering motor system we supposed is: (3) Consider two degree of freedom model of four-wheel steering vehicle and dynamic equations of steering structure motor system altogether.
During the change of parameter is little, the steering performance is carried out by adopting H2/H∞ structure controller.

Of which only a small part of the effective use of most of the separation of lignin is still concentrated directly into rivers or burned, causing serious environmental pollution and waste of resources [1], lignin is composed of structural units phenylpropanes with three-dimensional structure of natural aromatic polymers [2], can be used as basic material for synthetic polymer materials, replace or partially replace some chemical monomer.
Previously, the lignin complex amorphous structure limits its industrial use, which mainly exists in the timber and paper industry wastewater and agricultural wastes, serious pollution of the environment [7].
Lignin chemistry [M].
Lignin structure, function and use of high-value [J].

Intorduction Barium titanate has a perovskite ABO3 crystal structure, which makes it perform well as dielectric and ferroelectric materials [1-3].
Phase identification and crystal structures of the particles are determined by X-ray diffraction (XRD) (Rigaku 2500, Kyoto, Japan) with CuKa radiation of a wavelength of 0.154056 nm operated at 40 kV and 200 mA.
Results and discussion All the BaTiO3 nanopowders prepared at different raw material Ba/Ti ratios well crystallized in a perovskite structure with BaCO3 impurity.
Han, Defect chemistry of BaTiO3 under non-stoichiometric Ba/Ti ratio, J.

The effect of ASM advance the phase inversion point is obvious at 40˚C, the reason maybe is at low temperature, ASM adsorption on the surface of wax crystal, its hydration groups can produce larger space prevent the formation of wax crystal space mesh structure[3].When the temperature is 50˚C, viscosity of crude have a close relation with colloid and asphaltene.
At higher temperature, asphaltene relatively loose strong polar functional groups ,in the molecular structure of MSA ,its carboxylic acid anhydride and side chain of acid amides enter to flake molecules between colloid and asphaltene by peptizaiton, and form strong hydrogen bond with polar group in it, dividing polymer that formed by overlapping pileup, release the liquid oil that packaged in the micelle structure, that reduce the cohesion of oil.
Oilfield Chemistry, Science Press,Dec

Therefore, it is quite meaningful to conduct a systematical study on the influences of both internal and external structure upon the etching morphology of quartz glass, so as to improve the performance of quartz glass devices and broaden its practical application.
The equation is 4SiF4 + 3H2O + 2HF=3H2SiF6 + H2SiO3. (2) When a smooth, polished surface is etched, the surface lose its smooth appearance and cusp-like structures are formed.
Because the circumambience all around the micro-cracks has a loose atomic structure, hydrofluoric acid can infiltrate into these flaws easily, causing a faster reaction in the flaws than that in the complete surface.
B.Burg, In Fluorine Chemistry, J.

Son1,i 1Department of Physics, Chemistry and Biology, Linköping University, Sweden 2Institute for Solid State Physics and Optics, Wigner Research Centre for Physics, Hungarian Academy of Sciences, Hungary 3Institute of Physics, Loránd Eötvös University, Hungary 4Department of Electronic Science and Engineering, Kyoto University, Japan 5Department of Atomic Physics, Budapest University of Technology and Economics, Hungary axuatr@ifm.liu.se, bszasz.krisztian@wigner.mta.hu, ctom.hornos@gmail.com, dkawahara@semicon.kuee.kyoto-u.ac.jp, esuda@kuee.kyoto-u.ac.jp, fkimoto@kuee.kyoto-u.ac.jp, gagali@szfki.hu, herija@ifm.liu.se, ison@ifm.liu.se Keywords: Carbon vacancy, negative-U behavior, electron irradiation, EPR, supercell calculations.
The intensity ratios between the largest and smallest splitting hf lines and the main lines are ~10%, which is approximately the natural abundance of two 29Si atom (I=1/2 and 4.67% natural abundance), and are therefore assigned to the hf structures due to the hf interactions between the electron spin and the nuclear spin of one 29Si atom occupying one of two Si sites (denoted as Si3,4(k) and Si5,6(k), respectively).
From the intensity ratio of ~2.5% of the main line, the weakest hf lines are assigned to the hf structure due to the hf interaction between the electron spin and the nuclear spin of one 13C atom (I=1/2, 1.1%) occupying one of two C sites, denoted as C1,2(k).
The inset shows the calculated spin densities for stable configuration, which predominantly occurs at low temperatures, giving rise to the observed hf structures due to hf interaction with two nearest Si neighbors in the basal plane [Si3,4(k)] and with C and Si atoms in the second and third nearest neighbors [C1,2(k), Si5,6(k), respectively].

Morphological and Magnetic Properties of Electrodeposited Ni-Ag Alloy Nanowire Arrays in Modified AAO Template Weizheng Shang a, Weiguo Zhang b and Hongzhi Wang c Department of Applied Chemistry, Sugiyama Laboratory of Surface Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China aclimber.swz@gmail.com, bzwg@tju.edu.cn, cwanghz@tju.edu.cn Keywords: Nanowire Arrays, Electrodeposition, Ni-Ag Alloy, Magnetic Properties.
Fig. 2 (a-b) TEM images of the Ni-Ag nanowire (c) SAED pattern of Ni-Ag nanowires To observe the morphology and structure of the nanowires, we etched the samples in 1 M NaOH.
Fig. 2c was selected area electron diffraction (SAED) of the Ni-Ag alloy phase, and the diffraction pattern revealed that the nanowires was single crystal and fcc lattice structure.
Such nanowire arrays were single crystal and in fcc structure.

Synthesis, Properties and Application in Optical Recording of a New Diarylethene Bearing an Isoxazole Unit Hui Li, Shouzhi Pu*,Weijun Liu Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University, Nanchang 330013, P.
The two isomers of the photochromic molecules are substantially different in electronic and geometrical structures.
The most striking difference is that the π systems of the two aryl rings are separated in the open-ring isomer, whereas the closed-ring isomer has olefinic electronic structure and the two π systems are connected to each other and delocalize throughout the molecule [3].
The structures of diarylethene 1o were confirmed by melting point, NMR and IR.