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The Synthesis and Solubility of a Wholly Aromatic Polyamide Containing para- and meta-Substituted Phenylene Rings Yi-fan Wang1, a, Jun-Sun1, b, Li-xing Dai1, c 1College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China aAllen-MSE@foxmail.com, bsunjun@suda.edu.cn, cdailixing@suda.edu.cn Keywords: Aromatic Polyamide, Aramid, Copolymerization, Solubility Abstract.
The chain structure of the polymers was characterized by Fourier transform infrared spectroscopy (FT-IR) and Raman spectrum.
The extraordinary performance of aramid is oriented from its special molecular structure that the aromatic rings are alternately linked by amide linkage among the chain [9]: the wholly aromatic structure creates rigidly linear macromolecular chain, and the hydrogen bonds between different amide linkages make polymer perform a strong intermolecular force and a high crystallization tendency.
Chain Structure.
The chain structure of the polymers was further characterized by Raman and FT-TR spectra.

., Khabarovsk 680021, Russia 2Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials of RUS, 26a Akademgorodok, Apatity 184209, Russia a*pikoul2008@gmail.com, bn.sidorov@ksc.ru, cn.tepliakova@ksc.ru, dm.palatnikov@ksc.ru Keywords: laser conoscopy, conoscopic pattern, lithium niobate, optical homogeneity Abstract It was shown that laser conoscopy can visually detect even slight changes in the optical characteristics of a crystal when it is doped.
Moreover, in the region of concentration thresholds, pronounced anomalies of the structure and many physical parameters of the crystal are observed.
An analysis of the influence of the concentration of this dopant in the range from 0.003 to 5.5 % on the type, structure, and properties of conoscopic patterns of a lithium niobate single crystal showed the following results.
At a Mg2+ concentration of ~ 3% in a crystal, NbLi defects (Nb5+ cations located in lithium positions of the ideal stoichiometric structure) are completely replaced in the cationic sublattice.
At a Mg2+ concentration > 3%, base Li+ cations are replaced, accompanied by an increase in VLi defects (vacant oxygen octahedra, in which Li+ cations should be located in the ideal structure of stoichiometric composition).

Figure 2 shows its basic structure and working principle.
Through multiple sub-stack devices, it is available to obtain multi-layer structures.
Figure 15 shows the overall structure of the traditional yacht marina;.
The hull structure diagram of the differential modular boat [12] is shown in Figure 18.
This boat makes use of differential elements of the skeleton material which stabilize the mechanical structure.

Once the primary devolatilization products have been released from precursor structure, the inorganic species, especially calcium, in precursor are active in catalyzing secondary pyrolysis reactions, which include tar cracking or condensation, char gasification, steam reforming of hydrocarbons and the water-gas shift reaction [3].
Huang, A review on thermo-chemistry conversion of Animal manure, Journal of Agricultural Science and Technology (in Chinese), 10(2008) 22-27

Orientation Growth and Optical Properties of Sm2O3 Thin Films Yin Lixiong, Huang Jianfenga, Huang Yan, Cao Liyun Key Laboratory of Auxiliary Chemistry & Technology for Chemical Industry, Ministry of Education, Shaanxi University of Science & Technology, Xi'an Shaanxi, 710021, China a huangjf@sust.edu.cn Keywords: samarium oxide; optical thin films; sol-gel; hydrothermal process Abstract: Sm2O3 optical thin film is a new photovoltaic material and has potential applications in optical switches, date recording device and magnetic device.
This difference in band gap and optical properties shown in Fig.4 may result from the difference in micro- structures.

Chaiyasat1,a 1 Department of Chemistry, Faculty of Science and Technology, Rajamangala University of Technology Thanyaburi, Klong 6, Thanyaburi, Pathumthani 12110, Thailand 2Thailand Institute of Scientific and Technological Research, Klong 5, Klong Luang, Pathumthani 12120, Thailand ap_chaiyasat@mail.rmutt.ac.th Keywords: Poly (l-lactic acid), Urea, Encapsulation, Polymer Capsule Abstract: In this work, poly (l-lactic acid) (PLLA) microencapsulated urea as fertilizer was prepared in water in oil in water (W/O/W) system.
Ltd., Thailand) and scanning electron microscope (SEM) (JSM-6510, JEOL, JEOL Ltd., Japan) to investigate the inner structure and surface of the microcapsules, respectively.

Alumina fibers are widely used in adsorption and catalysts where their large surface area, pore structure and surface chemistry play an essential role [2].

College of Chemistry and Bioengineering; Guilin University of Technology; Guilin 541004;China 2.
As the potentiodynamic polarization results mentioned above, the sample with MAO coating had superior corrosion resistance to the magnesium alloy substrate, which should be attributed to their special structure and composition.

The Investigation Of Ultrahigh Pressuer Sintering of Cubic Boron Nitride With The Binding Agent of Si3N4 Shaojie Lin1,a, Yi Wu1,b, Zhengguang Zou1,c,Yufang Shen1,2,d 1,Key Laboratory of Nonferrous Materials and New Processing Technology of Ministry of Education, Guilin University of Technology, Guangxi, Guilin 541004 China 2, School of Chemistry & Chemical Engineering Guangxi University, Guangxi, Nanning 530004， China alinsjcn@163.com; bwuyimail@sohu.com; czouzg@glite.edu.cn; dyfsheng@glite.edu.cn Key words: cubic boron nitride; binding agents; bonding mechanism; mechanical properties Abstract.
[4]Yucheng Zhao, Mingzhi Wang: Effect of sintering temperature on the structure and properties of polycrystalline cubic boron nitride prepared by SPS.

Synthesis of Phenoxy Amide Derivatives Hong Wang1,a , Dongyuan Jin1,b,* , Zhiqiang Yang1,c , Yonghong Gao1,d , Jianwei Tao1,e and Lihua Li1,f 1 School of Chemistry and Environment Engineering, Shanghai Institute of Technology, Shanghai 200235, China awhong63@126.com, b,*jindongyuan@sit.edu.cn, cyangzhiqiang@sit.edu.cn, dgaoyonghonggg@sit.edu.cn, etaojianwei@sit.edu.cn, fllh@ sit.edu.cn.
Several new chlorobenzene acetamide additives were prepared by introducing bioactive p-chlorphenyl group into the structure of acetamide with piecing method of active group, which have seldom been reported up to now.