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Online since: October 2014
Authors: Pu Hong Wen
Results and Discussion
Crystal Structure.
The crystal structure of EDCC is built up by only the C2H8N2CuCl2 molecules.
The layers stack together to form a layered structure by intermolecular force.
The reason is that they are located in the different environment in the crystal structure.
Lang: Chinese Journal of Chemistry Vol. 22 (2004), p. 1091.
The crystal structure of EDCC is built up by only the C2H8N2CuCl2 molecules.
The layers stack together to form a layered structure by intermolecular force.
The reason is that they are located in the different environment in the crystal structure.
Lang: Chinese Journal of Chemistry Vol. 22 (2004), p. 1091.
Online since: June 2014
Authors: Yong Lin Kang, Hua Xiang Teng, Hai Quan Wang, Guang Hui Liu, Guang Rui Jiang, Li Bin Liu
Many studies have focused on the oxide chemistry and the relationship between surface chemistry and reactive wetting [5,6].
However, the combined effects of atmosphere and chemistry on the reactive wetting have not been fully investigated.
The segregation of chemistry to the external surface was explored.
Furthermore, the wettability of steel will be related to the surface structure prior to dipping.
Table 1 Compositions of the two samples(wt.%) Steels C Si Mn P Al Atomic ratio of Mn/Si CMnSi TRIP 0.12 1.3 1.5 0.008 0.05 1:2 CMnAl TRIP 0.17 0.15 1.5 0.008 1.3 5:1 Table 2 Experimential atmospheres H2/N2 rati0 Dew points,˚C PH2O/pH2 20%H2/80%N2 -60 0.00017 5%H2/95%N2 -30 0.00844 Results and discussion Surface structure prior to galvanizing The segregation of alloying elements after annealing under different oxidation potential (i.e. pH2O/pH2 ratio) was first investigated by GDOES.
However, the combined effects of atmosphere and chemistry on the reactive wetting have not been fully investigated.
The segregation of chemistry to the external surface was explored.
Furthermore, the wettability of steel will be related to the surface structure prior to dipping.
Table 1 Compositions of the two samples(wt.%) Steels C Si Mn P Al Atomic ratio of Mn/Si CMnSi TRIP 0.12 1.3 1.5 0.008 0.05 1:2 CMnAl TRIP 0.17 0.15 1.5 0.008 1.3 5:1 Table 2 Experimential atmospheres H2/N2 rati0 Dew points,˚C PH2O/pH2 20%H2/80%N2 -60 0.00017 5%H2/95%N2 -30 0.00844 Results and discussion Surface structure prior to galvanizing The segregation of alloying elements after annealing under different oxidation potential (i.e. pH2O/pH2 ratio) was first investigated by GDOES.
Online since: February 2012
Authors: Mei Zhang, Yong Jia Liu, Jia Shuang Luan, Hong Li Cai, Feng Xia Liu
However, zein films are brittle, and thus, some modifications are needed to improve their flexibility.[7-10]
Polyvinyl alcohol (PVA) is considered to be a regular structure, which molecular chain is supple and easy to stretch.
Carbon nanotube-polymer composites: Chemistry, processing, mechanical and electrical properties, Progress in Polymer Science, 2010, 35: 357-401 [2]Zhong-Fu Ren, Ji-Huan He.
Novel antimicrobial ultrathin structures of zein/chitosan blends obtained by electrospinning, Carbohydrate Polymers, 2009 (2)77: 261-266 [9]Gordon W.
Impact of Solvent on Electrospinning of Zein and Analysis of Resulting Fibersa, Macromolecular Chemistry and Physics, 2007(9)208, 1002-1010 [10]Takanori Miyoshi, Kiyotsuna Toyohara and Hiroyoshi Minematsu.
Improving the Compatibility of Zein/Poly(vinyl alcohol) Blends by Gamma Irradiation and Graft Copolymerization of Acrylic Acid, Journal of Agricultural Food Chemistry. 2010 58(7): 4470-4476
Carbon nanotube-polymer composites: Chemistry, processing, mechanical and electrical properties, Progress in Polymer Science, 2010, 35: 357-401 [2]Zhong-Fu Ren, Ji-Huan He.
Novel antimicrobial ultrathin structures of zein/chitosan blends obtained by electrospinning, Carbohydrate Polymers, 2009 (2)77: 261-266 [9]Gordon W.
Impact of Solvent on Electrospinning of Zein and Analysis of Resulting Fibersa, Macromolecular Chemistry and Physics, 2007(9)208, 1002-1010 [10]Takanori Miyoshi, Kiyotsuna Toyohara and Hiroyoshi Minematsu.
Improving the Compatibility of Zein/Poly(vinyl alcohol) Blends by Gamma Irradiation and Graft Copolymerization of Acrylic Acid, Journal of Agricultural Food Chemistry. 2010 58(7): 4470-4476
Online since: July 2016
Authors: Ali Nakhaei Pour, Javad Karimi, Zahra Keyvanloo, Mohamadreza Hashemian
The Journal of Physical Chemistry C. 2008;112:20269-75
Journal of Industrial and Engineering Chemistry. 2015;27:12-24
Computational and Theoretical Chemistry. 2013;1021:183-90
The Journal of Physical Chemistry C. 2012;116:25868-73
The Journal of Physical Chemistry B. 2001;105:7739-47
Journal of Industrial and Engineering Chemistry. 2015;27:12-24
Computational and Theoretical Chemistry. 2013;1021:183-90
The Journal of Physical Chemistry C. 2012;116:25868-73
The Journal of Physical Chemistry B. 2001;105:7739-47
Online since: July 2014
Authors: Li Jiang Hu, De Rong Lin
Structure of bridged silsesquioxane material bearing a pendant dodecylamine
Derong LIN1,a, Lijiang HU2,b
1School of Food Science, Sichuan Agricultural University, Ya’an, 625014, China
2Department of Chemistry, Harbin Institute of Technology, Harbin,150001, China
aemail:youngsumass@126.com, bemail:hulijiang2008@126.com
Keywords: Bridging polysilsesquioxane; Hydrophobic property; Atomic force microscopy(AFM)
Abstract.
Characterization of AFM on the structure of the surface morphology of the acid-catalyzed materials indicates the formation of layered structure.
The presence of two bands at 1040 and 1118 cm-1 evidences the presence of ladder structures formed by Si-O-Si bonds.
The structure of the material reflects the configuration of the hydrophobic structural importance roughness.
To our knowledge, this is the first example of the presence of this kind of structure in a cross-linked hybrid material.
Characterization of AFM on the structure of the surface morphology of the acid-catalyzed materials indicates the formation of layered structure.
The presence of two bands at 1040 and 1118 cm-1 evidences the presence of ladder structures formed by Si-O-Si bonds.
The structure of the material reflects the configuration of the hydrophobic structural importance roughness.
To our knowledge, this is the first example of the presence of this kind of structure in a cross-linked hybrid material.
Online since: June 2007
Authors: Geun Hyoung Lee, Myung Hee Cho
X-ray diffraction patterns showed that the TiO2 thin films had only rutile structure.
This implies that ZnO buffer layer promoted the crystallization of rutile structure.
There are three kinds of TiO2 crystallographic structure; anatase, rutile and brookite.
Thus, it is expected that the introduction of ZnO buffer layer, which has the same hexagonal crystal structure as that of the sapphire, on Si substrate improves the crystallization of TiO2 rutile structure.
Clark, The Chemistry of Titanium and Vanadium, Elsevier, New York, 1968, 266-277 [7] C.
This implies that ZnO buffer layer promoted the crystallization of rutile structure.
There are three kinds of TiO2 crystallographic structure; anatase, rutile and brookite.
Thus, it is expected that the introduction of ZnO buffer layer, which has the same hexagonal crystal structure as that of the sapphire, on Si substrate improves the crystallization of TiO2 rutile structure.
Clark, The Chemistry of Titanium and Vanadium, Elsevier, New York, 1968, 266-277 [7] C.
Online since: July 2011
Authors: Fen Wang, Da Wei Liu, Jian Feng Zhu, Dong Li
Microwave Hydrothermal Synthesis of ZrSiO4 Nano-powders
Feng Wang a, Dawei Liu b, Jianfeng Zhu c, Dong Li a
Key Laboratory of Auxiliary Chemistry & Technology for Chemical Industry, Ministry of Education
Shanxi University of Science & Technology, Xi’an 710021, China
a wfch2@163.com, bliu412@163.com, c zhujf@sust.edu.cn, dlidong-qycl@163.com
Keywords: Microwave-Hydrothermal Method, ZrSiO4, Low Temperature, Reaction Mechanism.
Moreover, The materials with zircon (ZrSiO4) structure doped with transition-metal(TM) and rare-earth (RE) ions have a wide variety of applications in pigments and in solid state laser, phosphor and luminescent devices.
Compared with the conventional technology, wet chemistry method has been proved more appropriate for preparing well-crystalline and nano-ZrSiO4.
As to the radius of fluorine ions is smaller than that of oxygen ions, F– ions can replace O2– ions and form Zr-F and Si-F bonds, which makes the structure network weak and lowers its bonding energy.
Shiegeyuki: Materials Chemistry and Physics Vol. 61 (1999), p: 5
Moreover, The materials with zircon (ZrSiO4) structure doped with transition-metal(TM) and rare-earth (RE) ions have a wide variety of applications in pigments and in solid state laser, phosphor and luminescent devices.
Compared with the conventional technology, wet chemistry method has been proved more appropriate for preparing well-crystalline and nano-ZrSiO4.
As to the radius of fluorine ions is smaller than that of oxygen ions, F– ions can replace O2– ions and form Zr-F and Si-F bonds, which makes the structure network weak and lowers its bonding energy.
Shiegeyuki: Materials Chemistry and Physics Vol. 61 (1999), p: 5
Online since: September 2013
Authors: Qing Hua Huang, Xiao Qing Dou, Xiong Xiong Bai, Zhong Yu Hu, Chuan Jie Cheng
Synthesis and Characterization of Reactive Michler's Ketones
Qinghua Huanga, Xiaoqing Doub, Xiongxiong Baic, Zhongyu Hud,
Chuanjie Chenge*
Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science&Technology Normal University, Nanchang, PR China
ahqinhua0220@163.com, b438398318@qq.com, c464326479@qq.com, dzyhu2003@126.com, e*chengcj530@gmail.com (corresponding author)
Keywords: Reactive photoinitiator; Michler's Ketone; synthesis; UV-cured resin; cardanol
Abstract.
The structures of the intermediates were characterized by 1H NMR and 13C NMR spectroscopy on a Bruker AV 400 MHz spectrometer, with tetramethylsilane (TMS) as the internal standard.
Similarly, the structure of compound 2 can be confirmed by Figure 1b.
Liu: Chinese Journal of Applied Chemistry, Vol. 29(2012), p. 392
Huang, et al: Chinese Journal of Synthetic Chemistry, Vol. 19(2011), 376
The structures of the intermediates were characterized by 1H NMR and 13C NMR spectroscopy on a Bruker AV 400 MHz spectrometer, with tetramethylsilane (TMS) as the internal standard.
Similarly, the structure of compound 2 can be confirmed by Figure 1b.
Liu: Chinese Journal of Applied Chemistry, Vol. 29(2012), p. 392
Huang, et al: Chinese Journal of Synthetic Chemistry, Vol. 19(2011), 376
Online since: February 2011
Authors: Yu Jing Nie, Ming Yang
Introduction
In recent years, a variety of dinuclear metallocene catalysts has been developed rapidly for olefin polymerization due to its possibility of tailoring the polymer properties, such as molecular weight, molecular weight distribution as well as stereochemistry through cooperative effects between two metal centers, ligand structures and the nature of the bridge.[1-4] In consideration of the bridge between two mechanically linked metallocene units, the nature of the bridge is an important factor to influence the catalytic activity.
The 1HNMR spectra of 1 shows both one singlet signal for the terminal cyclopentadienyl ligands, two triplets according to the A2B2 system of the bridging C5H4 groups, two triplets for the methylene group units SCH2 and CpCH2 in the expected ranges, thus proofing the proposed structure as well as the elemental analysis.
Bohmer: Journal of Organometallic Chemistry Vol.658(2002), p.259-265
Jung, et al.: Journal of Organometallic Chemistry Vol.580(1999), p.90-97
Journal of Organometallic Chemistry Vol.26(1988), p.3089-3112.
The 1HNMR spectra of 1 shows both one singlet signal for the terminal cyclopentadienyl ligands, two triplets according to the A2B2 system of the bridging C5H4 groups, two triplets for the methylene group units SCH2 and CpCH2 in the expected ranges, thus proofing the proposed structure as well as the elemental analysis.
Bohmer: Journal of Organometallic Chemistry Vol.658(2002), p.259-265
Jung, et al.: Journal of Organometallic Chemistry Vol.580(1999), p.90-97
Journal of Organometallic Chemistry Vol.26(1988), p.3089-3112.
Online since: November 2012
Authors: Zheng Gu, Wei Sheng Liu, Guo Jun Song
Preparation and Properties of cis-1,4-Polybutadiene Rubber /OMMT/AT Nanocomposites
Zheng Gu1,2,a, Guojun Song1, Weisheng Liu2
1Institute of Polymer Materials, Qingdao University, Qingdao 266071, China
2Department of chemistry and State Key Laboratory of Applied Organic chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
aguzheng596@163.com
Keywords: Cis-1,4-polybutadiene rubber (BR); Organic montmorillonite (OMMT); Attapulgite (AT); Solution intercalation; Mechanical properties; Crosslink density;
Abstract.
Since the polymer/clay nanocomposites are invented, polymer layered silicate nanocomposites have attracted greatly interest of researchers in the world both in industry and in science [3], because of this kind of nanocomposites exhibit excellent properties compared to their micron or macro-composites due to the fine phase dimensions and special phase structure involved [4].
[9] Zheng Gu, Weisheng Liu, Guojun Song, Structure and properties of hydrogenated nitrile rubber (HNBR)/organo-montmorillonite (OMt) nanocomposites.
Since the polymer/clay nanocomposites are invented, polymer layered silicate nanocomposites have attracted greatly interest of researchers in the world both in industry and in science [3], because of this kind of nanocomposites exhibit excellent properties compared to their micron or macro-composites due to the fine phase dimensions and special phase structure involved [4].
[9] Zheng Gu, Weisheng Liu, Guojun Song, Structure and properties of hydrogenated nitrile rubber (HNBR)/organo-montmorillonite (OMt) nanocomposites.