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Miscibility of Semi-flexible Thermotropic Liquid Crystalline Copolyesteramide with Polyamide 66

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Chemical Research in Chinese Universities 2000年第4期16卷 356-362页

作者： XIE Xiao-Lin, TJONG S. C. and LI R. K. Y. (department of Chemistry, Huazhong university of Science and Technology, Wuhan 43.074 department of {3. and Materials Science, City university of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong P. R. china) Huazhong Univ Sci & Technol Dept Chem Wuhan 430074 Peoples R China City Univ Hong Kong Dept Phys & Mat Sci Kowloon Hong Kong Peoples R China

Liquid crystalline polymer-polyamide 66 (LCP/PA66) blends were compounded by using a Brabender mixing followed by compression moulding. The LCP employed was a semi-flexible liquid crystalline copolyesteramide based on 3.% (molar fraction ) of p-amino benzoic acid (ABA ) and 70% (molar fraction) of poly (ethylene terephthalate) (PET). The LCP/PA66 blends were investigated in terms of the thermal and dynamic mechanical properties. It was found that PA66 and LCP components of the blends are miscible in the molten state, but are partially miscible in the solid state. The inclusion of the semi-flexible LCP into PA66 retards the crystallization rate of PA66. Furthermore, the melting temperature and the degree of crystallinity of PA66 are reduced considerably due to the LCP addition.

关键词： Polyamide 66 Semi-flexible copolyesteramide Miscibility

Teracluster LSSC-Ⅱ——Its designing principles andapplications in large scale numerical simulations

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Science china Mathematics 2004年第z1期47卷 53-68页

作者： ZHANG Linbo, CHEN Shiyi, LI Xinliang, CAO Jianwen, ZHANG Wensheng & GONG Xingaostate Key laboratory of Scientific and Engineering Computing, Academy of Mathematics and System Sciences, Chinese Academy of Sciences, Beijing 100080, china {3. of Mechanical Engineering, The Johns Hopkins university and Center for Computational Science and Engineering, Peking university, Beijing 100875, china Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, china Parallel Computing laboratory, Institute of Software, Chinese Academy of Sciences, Beijing 100080, china Academy of Mathematics and System Sciences, Chinese Academy of Sciences, Beijing 100080, china Surface physics laboratory (National Key laboratory), Fudan university, Shanghai 20043. Institute of solid state physics, Chinese Academy of Sciences, Hefei 23.03., china

The teracluster LSSC-II installed at the state Key laboratory of Scientific and Engineering Computing, Chinese Academy of Sciences is one of the most powerful PC clusters in china. It has a peek performance of 2Tflops. With a Unpack performance of 1.04Tflops, it is ranked at the 43.d place in the 20th TOP500 List (November 2002), 51st place in the 21st TOP500 List (June 2003., and the 82nd place in the 22nd TOP500 List (November 2003. with a new Linpack performance of 1.3.flops. In this paper, we present some design principles of this cluster, as well as its applications in some large-scale numerical simulations.

关键词： high performance computing, PC cluster, large scale numerical simulations.

Construction of High-nuclearity 3.-4f metal clusters via anion-template from in situ decomposition of organic ligand

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Construction of High-nuclearity 3d-4f metal clusters via ani...

11th Conference on solid state Chemistry and Inorganic Synthesis Joint with 2th Dalton Transactions International Symposium

作者： La-Sheng Long state Key laboratory of Physical Chemistry of solid Surface and {3. of Chemistry,College of Chemistry and Chemical Engineering,Xiamen university,Xiamen 3.1005, china.

High-nuclearity 3.-4f metal clusters that show fascinating structures and interesting properties have been attracted much attention in the field of physics,chemistry, biology,nanotechnogly and material *** synthetic s... 详细信息

关键词： Soc Construction of High-nuclearity 3.-4f metal clusters via anion-template from in situ decomposition of organic ligand

A new way of transformation from a-quartz to coesite

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Progress in Natural Science:Materials International 2006年第10期16卷 1090-1097页

作者： SU Wenhui, LIU Shue, XU Dapeng, WANG Weiran, YAO Bin, GUO Xingyuan, LIU Zhiguo, and ZHONG Zheng ( Center for the Condensed Matter Science and Technology, Harbin Institute of Technology, Harbin 150001, china Center for Rare-Earth solid state {3., Jilin university, Changchun 13.023. china International Center for Materials {3., Chinese A-cademy of Sciences, Shenyang 110015, china Center for Condensed Matter and Radiation {3., china Center of Advanced Science and Technology (World laboratory), Beijing 100080, china department of {3., university of Windsor, Windsor, ON N9B 3.4, Canada) Center for Rare-Earth solid state physics Jilin University Changchun 130023 China International Center for Materials physics Chinese Academy of Sciences Shenyang 110015 China Center for Condensed Matter and Radiation physics China Center of Advanced Science and Technology (World Laboratory) Beijing 100080 China Center for the Condensed Matter Science and Technology Harbin Institute of Technology Harbin 150001 China department of physics University of Windsor Windsor ON N9B 3P4 Canada

A laboratory method combining the high-energy mechanical ball milling and high static pressure has been suggested for modelling synthesis of coesite in the Earth's crust. A window of milling time, a mechanical collision-induced intermediate phase ofα-quartz and its condition of easily crystallizing into coesite under the condition of 3.0 GPa, 923.K, < 1.0 min have been discovered. The new method needs much shorter synthesizing time and lower synthesizing critical pressure than those used before. The Raman spectra for the coesite synthesized by the present method have covered all the information of those natural and synthesized coesites reported before. It is demonstrated that this method has a great potential in geo-science research and implied the other possible mechanism of coesite formation in the Earth's crust.

关键词： quartz-coesite high-energy mechanical ball milling high state pressure Raman spectrum metastable phase sub-duction-exhumation of plate.

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激光光散射作为铁电材料科学研究的工具

物理学进展 1988年第1期 48-62页

作者： J.F.Scott 张明生 Condensed Matter laboratory department of physics university of Colorado Boulder CO803.9 USA 南京大学现代分析中心和固体微结构实验室

自1960年以来,激光非弹性光散射技术极为广泛地应用于材料科学的研究方面。喇曼光谱,布里渊光谱以及自关联光谱技术在铁电的有关领域获得了许多重要而新型的信息。本文将简要地评述这些技术的应用情况。

关键词：喇曼光谱绝缘体拉曼光谱激光声子准粒子铁电薄膜电介质薄膜铁电材料赛格涅特电材料电介质光散射技术单晶体化学计量比喇曼谱公度弹性常数劲度常数模量

Ab initio investigation of Li diffusion in Cu thin film

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Ab initio investigation of Li diffusion in Cu thin film

第十二届中国固态离子学学术会议

作者： Zhihua Xiong, Siqi Shi, Chuying Ouyang, Minsheng Lei, Liyun Hu, Yinghua Ji, Zhaoxiang Wang, and Liquan Chen laboratory for solid state Ionics, Institute of {3., Chinese Academy of Sciences P.O.Box 603. Beijing 100080, china department of {3., Jiangxi Normal university, Nanchang 3.0027, china department of {3., Jiangxi Science & Technology Normal university, Nanchang 3.0013. china

基于密度泛函理论的第一性原理分子动力学,我们研究了Li离子在铜薄膜中各种可能的扩散机制.结果表明,Li离子以最近邻空位扩散时所需克服的势垒最小,0.69eV.同时,我们还证实,随着空位浓度的增加,Li离子更易扩散.

关键词：铜薄膜第一性原理分子动力学扩散

A Stable Red Emission in Polymer Light-Emitting Diodes based on Phenothiazine Derivative

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A Stable Red Emission in Polymer Light-Emitting Diodes based...

2007亚洲光电子会议LED材料与器件分会场

作者： Huayu Cao a Zhijian Chen a Yingliang Liu a Jianghui Li b Shaokui Cao b Lixin Xiao a Shengang Xu b Qihuang Gong a a state Key laboratory for Artificial microstructures & Mesoscopic {3. department of {3. Peking university Beijing 100871 PR china b School of Materials Science & Engineering Zhengzhou university Zhengzhou 450052 PR china

A novel soluble phenothiazine-based derivative, poly（3. 7-divinylene-N-octyl-phenothiazine 2, 3.diethylquinoxaline-5,8-diyl）（PQDN）, is synthesized for application in red light-emitting diodes. PQDN was characterized by the measurements of cyclic voltammetry （CV）, absorption and photoluminescence （PL） spectra. The band gap （Eg） was determined to be 1.89 eV. The smaller band gap suggested that the polymer is a good candidate for red electroluminescent materials. Polymer light-emitting diodes （PLEDs） with double-layer configuration of indium tin oxide （ITO） / （poly-ethylenedioxythiophene）:poly（styrene sulfonate）（PEDOT:PSS） / PQDN: poly（N-vinylcarbazole）（PVK）（100:0, 80:20, 60:40, and 20:80 wt.%） / Mg:Ag were fabricated. The electroluminescent （EL） property was studied in details. In order to improve the EL performance further, the devices were thermally annealed at 100oC for one hour under the protection of nitrogen. Luminance is increased obviously. EL peak wavelength and the Commision International de L’Eclairage （CIE） coordinates are unaltered and located in red region with the increase of the operating voltages,.

关键词： Phenothiazine red emission electroluminescence

Photoinduced Oxygenization of C60 Film

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Photoinduced Oxygenization of C60 Film

Ⅻ International Symposium on Small Particles and Inorganic Clusters

作者： Xiaojun Liu Desheng Ding and Shuyi Zhangstate Key Lab of Modern Acoustics and Institute of Acoustics nanjing university {3. department of Electronic Engineering Southeast university {3.

＜正＞ Since the discovery of stable clusters of 60 carbon atoms and the tentative assignment of the soccerball-like truncated icosahedral structure to C60, a great deal of work has been devoted to the preparation of pure samples in a variety of forms and the characterization of their chemical and physical properties [1]. Phillips et al. [2] found that the electrical conductivity of thin film C60 was changed by more than seven orders of magnitude with

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Crystallization behaviour and high coercivity of (Nd,Pr)_(13.Fe_(80)Nb_1B_6 melt-spun ribbons

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Rare Metals 2009年第3期28卷 253-256页

作者： GUO Pengju LIU Xincai PAN Jing XU Feng LI Yong CUI Ping Faculty of Materials Science and Chemical Engineering Ningbo University Ningbo 315211 China Institute of solid state physics Chinese Academy of Sciences Hefei 230031 China Ningbo Institute of Materials of Technology and Engineering Chinese Academy of Sciences Ningbo 315040 China

Amorphous （Nd,Pr）13.e80Nb1B6 ribbons were crystallized at 670-73.°C for 5-25 min to study the effects of isothermal crystallization on their behavior and magnetic properties. XRD results indicate that the isothermal incubation time is 12, 5, and less than 5 min at 670, 700, and 73.°C, respectively. High coercivities, with the maximum value of iHc = 1616 kA/m at 700°C for 19 min, measured by a physical property measurement system, are obtained in the crystallized ribbons. This is mainly attributed to the addition of Pr and Nb, because Pr2Fe14B has a higher anisotropic field than Nd2Fe14B, and Nb enriched in the grain boundary regions can not only reduce the exchange-coupling effects among hard grains, but also impede grain growth during the crystallization process. In addition, it should also be related to the characteristics of the furnace that the authors designed.

关键词： Nd-Fe-B isothermal crystallization coercivity melt-spun ribbons Pr substitution