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Preparation and Properties of Polyurethane Heat Insulating Building Materials Based on Lignin HAN Yanming1,a, QIN Tefu1,b and CHU Fuxiang1,c* 1 Laboratory of Wood Chemistry and Application, Institute of Wood Industry, Chinese Academy of Forestry, Beijing 100091, China ahanym@caf.ac.cn, bqintefu@caf.ac.cn, cchufuxiang@caf.ac.cn Keywords: Lignin, Polyurethane, Heat insulating building material Abstract.
As the molecular structures of lignin are rather complicated, lignin needs to be modified before its conversation into polymer materials.
Fig. 1 The structure of lignin basic units.

Electric and Damping Properties of PU Based IPNs-BaTiO3 Nanocomposites Dongyan Tang, Zheng Jin and Liangsheng Qiang Department of Applied Chemistry, Harbin Institute of Technology, Harbin 150001, China Keywords: Interpenetrating Polymer Networks; Barium Titanate; Damping Property Abstract.
Introduction Owing to the existence of large amount of micro- or sub-micro-multi-phase structures, especially, the characteristics of a broadened Tg ranges in partial IPNs, IPNs have been made potential utilities in many applied fields, such as being effective damping materials in noise and vibration control system.
The nanocomposites also exhibit the unreversal symmetry character (i.e. without symmetrical center) in crystal structures of system as that of pure BaTiO3.

After the surface’s hydrogen atom of polyethylene is replaced by fluorine atom, the surface forms a layer like molecular film structure, which has good oleophobic characteristics, and it not only can raise the high temperature and oil resistant proiperties of the polymer, but also can raise polyethylenic surface’s performance to separate oil soaking and permeating.
The surface’s fluorinated content of 1# HDPE microsphere is the highest compared with the other, and the fluorine atoms are mostly replaced by the hydrogen atom of HDPE microsphere on the surface, and forms a thin barrier layer which is similar to the structure of the PTFE, and in the chart，the 1#curve keeps under the 2#curve, while 3# curve is keeping at the top.
Ed [J]. 1998, No37, 1946 [3] R.E.Bank, B.E.Swart, J.C.Tatlow: Organofluorine Chemistry [M], Plenum Press, New York, 1994: p58 [4] Th.F.Tadros: J.Colloid Interface Sci [J]. 1980, No74, p196 [5] Houceng Rao.

Lithium intercalation compounds consist of a host matrix into/ from which the Li-ion species can be inserted/extracted reversibly without rearrangement of the host structure.
The XRD pattern of pure LiMn2O4 can be matched to that of the (ICDD 00-035-0782) which is the spinel structure with space group Fd-3m.
Branford, A.Antonini, M.Paquali: J.Physics and Chemistry of Solids 65, (2004) p 29-37

Adsorption of Food Dye onto Gelatin Microspheres: pH Effect in Kinetics and Mechanism Haiyan Xue 1, a, Fang Han 1, b,, and Baoyuan He 1,c 1Key Laboratory of Auxiliary Chemistry and Technology for Light Chemical Industry, Ministry of Education, Shaanxi University of Science & Technology, Xi'an 710021, China axuehaiyan@sust.edu.cn, bhanfang_19870814@yahoo.cn, chebaoyuan@sust.edu.cn Keywords: Gelatin microspheres, Food dye, Intraparticle diffusion, Film diffusion.
Fig. 1 shows the chemical structure of the two dyes.
Chemical structures of the dyes: (a) FY2, (b) FR7 Fig. 2.

Synthesis and Fluorescence Switching of a New Purple Photochromic Diarylethene Ming Liu, Gang Liu* and Shiqiang Cui Jiangxi Key Laboratory of Organic Chemistry Jiangxi Science and Technology Normal University Nanchang 330013, P.
The structure of 1a was characterized by 1H NMR.
The structure of 1a was characterized by 1H NMR. 1H NMR (400 MHz, CDCl3, ppm): δ 2.01 (s, 3H, -CH3), 2.52 (s, 3H, -CH3), 6.76 (s, 1H, thiophene-H), 7.15 (d, 1H, benzene-H), 7.27-7.29 (t, 2H, benzene-H), 7.31 (d, 1H, benzene-H), 7.80(t, 1H, pyridine-H), 7.62 (d, 1H, pyridine-H), 8.53 (d, 1H, pyridine-H), 8.82 (s, 1H, pyridine-H).

Bailey1,b and Rolf Gubner1,c 1Corrosion Centre for Education, Research and Technology, Department of Chemistry, Curtin University, GPO Box U1987, Perth, WA, 6845, Australia al.machuca2@curtin.edu.au, bs.bailey@curtin.edu.au (corresponding author), cr.gubner@curtin.edu.au Keywords: Crevice Corrosion, Microbial Corrosion, Corrosion Resistant Alloys, Seawater.
Interestingly, grain structures were observed at the crevice former boundaries on 316L exposed to NSW (Fig 3.c).
(c) 316L showing grain structures and localized attack and (d) pitting concentrated at the outside edges of the crevice former).

Many experiments confirm that these compounds can insert surface of Mg or magnesium based alloy, altering surface structure and phase type, increasing density of boundary and flaw in alloy, supplying active core and passageway for hydrogen diffusion, so as to improve adsorbing and desorbing hydrogen property [3-5].
Hongliang Sun [7] prepared nanometer hydrogen storage composite alloy Mg-Mg1.8La0.2Ni by high-energy ball-milling, which had character of nanometer crystal and amorphous state structure.
[11] Qian Li: Physical chemistry for hydrogenation reaction of Mg-based alloy (Thesis for Ph.D of Beijing university of science and technology, 2004) In Chinese.

In 98 porcelain, because of high degree crystallinity, less porosity, compact structure and the 1-2μm average grain size, only a few grains grows up abnormally and transgranular fracture is the main fracture mode.
Influence of powder structure on processing and properties of advanced ceramics.
Influence of powder, chemistry and intergranular phases on the wear resistance of liquid-phase-sintered Al2O3.

Introduction Tungsten with body centered cubic structure has high melting point, high density and high hardness.
Thus, lots of researchers have pay attention to the optimization of the fabrication process [7, 8]. 2.1 Powder preparation and modification 2.1.1 Spray Drying Method Spray Drying is also known as Spray Conversion Process, which means via combined method of chemistry and physics the nanometer composite powder can be prepared by atomized solution.
After sintering, the thermal conductivity and hardness are improved to some degree, of which the thermal conductivity is 187W/m*K and the hardness is 347HV [10]. 2.1.3 Mechanical alloying method Mechanical alloying method is also known as high energy ball milling, of which the principle is that due to the severe impact between the particle and milling ball, cold welding and fracture will occur repeatedly to the metal or alloy powder which is put into high energy ball-milling machine, and then mutual diffusion and reaction between atoms occur to the powder resulting in the generation of the composite powder of nanometer structure.