PPS／PA—66共混物热行为的研究

利用差示扫描量热（ＤＳＣ）、热失重（ＴＧ）和微分热失重（ＤＴＧ）研究了ＰＰＳ／ＰＡ－６６共混物的热行为和降解过程。实验结果表明，共混物具有双熔融行为，在７００℃以下为二步降解。     

氯化聚丙烯热氧降解研究

用ＴＧ－ＤＴＧ－ＤＳＣ法研究了低氯化聚丙烯（Ｃ１－ＰＰ），于空气中在不同升温速率β时的热氧降解过程，可为４步反应；随β增大，降解温度线性升高，失重率变化不大；结合反应热效应，探讨了反应机理。     

不同氯含量氯化聚丙烯的热降解

用ＴＧ－ＤＴＧ－ＤＳＣ法研究了低氯化聚丙烯（Ｃｌ－ＰＰ）在空气、Ｎ２气流中线性升温时的热降解，发现随Ｃｌ％增加，主链脱ＨＣＬ的失重率增大，而主链的降解失重率减小；Ｎ２气中平衡热降解温度ＴＰ１、Ｔ０．１随ＣＬ％的提高而下降，而ＴＰ２、ＴＰ３与其无关；空气中ＴＰ１、ＴＰ２随ＣＬ％的提高而下降，Ｔ０．１、ＴＰ３与其无关。     

超高分子量聚乙烯热降解行为的研究

本文利用热重分析法（ＴＧ－ＤＴＧ），差热分析法（ＤＴＡ），粘度法研究了超高分子量聚乙烯（ＵＨＭＷＰＥ）在空气或Ｎ２气氛下的热降解行为，结果表明ＵＨＭＷＰＥ热降解过程符合自由基连锁反应机理，其热解行为或受空气或Ｎ２气氛，升温经和恒温时间的影响。     

反应注射成型(聚氨酯-聚苯乙烯)间充复合弹性体的热性能研究

通过ＤＳＣ、ＴＧ考察了反应注射成型（聚氨酯－聚苯乙烯）间充复合弹性体各相态间的相互作用及其热降解规律。结果表明，ＰＵＲ交联密度提高有利于其软段相与ＰＳ相形成部分互溶的微相结构，而ＮＣＯ／ＯＨ的提高则促进软段的微相分离及增大ＰＳ与ＰＵＲ的相容性。该共混体系的热裂解属无规热降解反应，不同热裂解温度区域内各相态的热失重均有所偏重。     

CuO－SnO_2纳米晶粉料的Sol－Gel制备及表征

不用金属醇盐而以无机盐为起始物质，采用Ｓｏｌ－Ｇｅｋ法得到了平均晶粒尺寸为２１～２２ｎｍ，ＣｕＯ掺杂的ＳｎＯ_２粉料；运用Ｘ射线衍射（ＸＲＤ）、差热—失重分析（ＤＴＡ－ＴＧ）、透射电镜（ＴＥＭ）及ＢＥＴ比表面（ＳＡ）测定等分析手段对粉料进行了表征．实验表明，ＣｕＯ的掺杂抑制了ＳｎＯ_２晶粒的生长；以无机盐为原料，采用Ｓｏｌ－Ｇｅｌ法制取ＳｎＯ_２（ＣｕＯ）纳米级晶料是切实可行的，将有利于产业化．     

CuO—SnO2纳米晶粉料的Sol—Gel制备及表征

不用金属醇盐而以无起始物质，采用Ｓｏｌ－Ｇｅｋ法得到了平均晶粒尺寸为２１－２２ｎｍＣｕＯ掺杂的ＳｎＯ２粉料；运用Ｘ射线衍射（ＸＲＤ），差热－失重分析（ＤＴＡ－ＴＧ），透射电镜（ＴＥＭ）及ＢＥＴ比表面（ＳＡ）测定等分析手段对粉料进行了表征，实验表明，ＣｕＯ的掺杂抑制了ＳｎＯ２晶粒的生长，以无机盐为原料，采用Ｓｏｌ－Ｇｅｌ法制取ＳｎＯ２（ＣｕＯ）纳米级晶料是切实可行的，将有利于产业化。     

Sol-Gel法合成MAPS-Ti(OC_4H_9)_4体系的有机聚钛硅氧烷的结构和性能

用ｓｏｌ－ｇｅｌ技术在酸催化下水解、合成ＭＡＰＳ－Ｔｉ（ＯＣ４Ｈ９）４体系溶胶，用热失重分析（ＴＧＡ）、差动分析（ＤＳＣ）结合红外光谱（ＦＴ－ＩＲ）分析不同组分与不同条件下合成的溶胶－凝胶的热性能和结构关系，并用盐雾试验和电化学测试方法评价了它们涂膜的耐蚀性。     

反应注射成型(聚氨酯-聚苯乙烯)间充复合弹性体的热…EI

通过ＤＳＣ、ＴＧ考察了反应注射成型（聚氨酯－聚苯乙烯）间充复合弹性体各相态间的相互作用及其热降解规律。表明，ＰＵＲ交联密度提高有利于其软段相与ＰＳ相形成部分互溶的微相结构，而ＮＣＯ／ＯＨ的提高则促进软段的微相分离及增大ＰＳ与ＰＵＲ的相容性。该共混体系的热裂解属无规热解反应，不同热裂解温度区域内各相态的热失重均有所偏重。     

双氧型双马来酰亚胺树脂的合成与表征

合成了对－马来酰亚胺基苯甲酸（ＭＢＡ），对其合成工艺进行了探讨。以 酰亚胺苯甲酸和ＣＹＤ－１２８环氧原料，在催化剂存在下合成了环氧型双马来酰亚胺（ＥＢ）权指；利用红外光谱（ＩＲ），差热扫描量热（ＤＳＣ）及热失重分析（ＴＧＡ）对ＥＢ和固化＿ＥＢ树脂结构，反应性及热稳定性进行了表征。     

Insertion of triangulated surfaces into a meccano tetrahedral discretization by means of mesh refinement and optimization procedures

In this paper, we present a new method for inserting several triangulated surfaces into an existing tetrahedral mesh generated by the meccano method. The result is a conformal mesh where each inserted surface is approximated by a set of faces of the final tetrahedral mesh. First, the tetrahedral mesh is refined around the inserted surfaces to capture their geometric features. Second, each immersed surface is approximated by a set of faces from the tetrahedral mesh. Third, following a novel approach, the nodes of the approximated surfaces are mapped to the corresponding immersed surface. Fourth, we untangle and smooth the mesh by optimizing a regularized shape distortion measure for tetrahedral elements in which we move all the nodes of the mesh, restricting the movement of the edge and surface nodes along the corresponding entity they belong to. The refining process allows approximating the immersed surface for any initial meccano tetrahedral mesh. Moreover, the proposed projection method avoids computational expensive geometric projections. Finally, the applied simultaneous untangling and smoothing process delivers a high‐quality mesh and ensures that the immersed surfaces are interpolated. Several examples are presented to assess the properties of the proposed method.     

The Research of Anti-Wear Properties of Organomolybdenum Compounds in the Engine Oils

A four-ball tester was used to evaluate the anti-wear performance of three kinds of organomolybdemun compounds in the engine oils, i. e., molybdenum dialkyldithiophosphate (MoDDP), molybdenum dialkyldithiocarbamate ( MoDTC), and sulphur and phosphorus freeorganomolybdeum (Molybdate). The results indicate that a low concentration of MoDDP doesn' t improve the anti-wear properties of the commercial engine oils, but a high concentration of MoDDP can obviously improve the anti-wear properties and the load-carrying capacity of the engine oils. MoDTC doesn' t improve the antiwear properties of the engine oils, but worsens the anti-wear properties of the oils. Signifi can timprove ment of frictional and wear characteristics is obtained with Molybdate added in the commercial engine oils and the formulated oils.     

Certification Institutions Expected to Update and Transfer Information on Present Standards

Standards are the basis for production enterprises to organize production, ex-factory inspection, trade (delivery) and technical exchanges, product certification, quality arbitration and supervision.……     

Flow calorimeter for enthalpy increment measurements on condensed gases

A flow calorimeter for enthalpy increment measurements on condensed gases is presented. A better knowledge of the properties of the liquefied natural gas is needed, and therefore a liquid loop has been designed for our flow calorimeter. The fluid loop in the calorimeter is designed in order to avoid the two-phase region, since two phases would give compositional disturbances in the measurements. The avoidance of the two-phase region is made possible by increasing the pressure of the test fluid after the measurement section, then heating the fluid at super-critical pressure past the critical point. Finally, the fluid is throttled to the low-pressure gas state at the inlet condition of the compressor that circulates the fluid. To perform the pressure increase, a new cryogenic pump has been designed. To evaluate the new equipment, measurements were taken on liquid ethane over the temperature range 146–256 K at pressure between 0.9 and 5.1 MPa.     

Certification Becomes Important for the I Quality; and Safety Supervision of the Chinese Liquor Sector

The end of 2007, over 200 unit products of more than 80 Chinese firms have passed the quality grade certification for liquor products. These products involve distilled spirits, beer, wine, yellow wine, fruit syrup wine and others, and cover over 80% of the national top-branded liquor products.……     

Deposition and Coating Properties on CVD Tungsten

Surface characterization and microstructure studies are performed on chemical vapor deposited (CVD) tungsten coating. There is about 2 μm thickness diffusion layer of tungsten in the molybdenum substrate. The thermal shock test shows tungsten coating has good adhesion with molybdenum substrate, but the elements of oxygen and carbon in the tungsten coating have the bad affection to the adhesion. The result of high-temperature diffusion experiment is the diffusion rate from molybdenum substrate to tungsten coating is faster.     

Refrigerators Enter a New Era of Health Preservation Frestech initiates the establishment of China's first standard for household sterilization refrigerators

On November 30, 2007, the China Association for Standardization (CAS) held a press conference at Beijing Diaoyutai State Guest House. Leaders from the China Household Electric Appliance Research Institute, the China Household Electric Appliance Association, and the China Consumers' Association attended and made speeches.……     

Analysis of marine hydrobiont lipid extracts as possible cryoprotective agents

We studied a combined effect of the cryoprotectants both of lipid and carbohydrate origin at the presence of DMSO or without it on cell viability and the RNA synthesis in the embryonic mollusc and echinoderm cell cultures obtained at different developmental stages. Cryoprotective properties of exogenous lipids correlated with their thermotropic behavior. Lipid extracts from marine hydrobiontes, which thermal transitions are characterized by relatively small part of calorimetric thermogram area lying at temperatures above 0 °C (6–18%), were found to possess a considerable cryoprotective activity. The results are discussed in relation to the prediction of the cryoprotective activity of lipid extracts for marine animal cells. In addition, it was found that marine invertebrate cells can be cryopreserved without DMSO at the presence of trehalose and lipid extracts of some marine hydrobiontes.     

Low-Temperature Properties of Silver

Pure silver is used extensively in the preparation of high-temperature superconductor wires, tapes, films, and other configurations in which the silver not only shields the superconducting material from the surrounding materials, but also provides a degree of flexibility and strain relief, as well as stabilization and low-resistance electrical contact. Silver is relatively expensive, but at this stage of superconductor development, its unique combination of properties seems to offer the only reasonable means of achieving usable lengths of conductor. In this role, the low-temperature physical (electrical, thermal, magnetic, optical) and mechanical properties of the silver all become important. Here we present a collection of properties data extracted from the cryogenic literature and, to the extent possible, selected for reliability.