APL has begun polarization studies to characterize the corrosion resistance afforded solely by the Ni:Zn alloy. APL has also demonstrated the ability to plate a Zn-rich alloy that is expected to have >60Zn by atom fraction. Lastly, PPG has developed a method for the scale up of the emulsification process that simultaneously results in reduced particle size. The next major milestone is to determine the Ni:Zn alloy that provides the best galvanic protection to steel based on electrochemical characterization. According to the current research plan, this objective is due by the end of April. The following milestone is the ability to heal 1/32' scratches by month 5 (2 months from now). APL is currently working to encapsulate wetting agents to improve resin spreading upon the microcapsule rupture.

关键词：成纤维细胞；添加剂；自运行；电偶腐蚀；表面活性物质

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报告从战略性分析、环境信息、竞争对手情报、资讯信息快报、市场行情与数据分析等几个方面对石油化工行业进行了分析评论。

关键词：石油化工；战略性分析；环境信息；竞争对手情报；资讯信息快报；市场行情

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The optical properties of transparent polymer fibers are investigated for use in transparent composite materials using a Fizeau interferometer. Refractive index and thermo-optic measurements are performed for off-the-shelf and internally manufactured fibers. The interferometer is shown to produce accurate, repeatable results for fibers with a cross-sectional area of over 500 m2. Results show that manufacturing variables can have significant effects on the optical properties of polymer fibers, particularly birefringence.

关键词：复合材料；干涉仪；光学性能；聚合物；折射率

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Nitrate and technetium-99 (Tc-99) concentrations measured in the water condensate of soil gas extracted as part of earlier work at the U.S. Department of Energy's Hanford Site in southeastern Washington State suggest that pore water was extracted from the sediment and entrained in the exhausted soil gas. As a remedial approach, pore-water extraction offers the possibility of contaminant and water removal from the vadose zone, which may be beneficial in reducing the flux of vadose zone contaminants to the groundwater. Previous laboratory and modeling efforts examining pore-water extraction have focused on two implementation approaches: 1) application of negative pressure (vacuum) via soil-gas extraction at a well to induce coincident pore-water extraction; and 2) deployment of super-absorbent polymers in a well to extract water from the surrounding soil. In this study, laboratory experiments and numerical modeling were conducted to specifically examine pore-water extraction for sediment conditions relevant to the vadose zone beneath the SX Tank Farm at the Hanford Site. Available SX Tank Farm data were evaluated to generate a conceptual model of the subsurface in areas with elevated moisture and Tc-99 concentration. This conceptual model formed the basis to select materials for subsequent laboratory hydraulic property analyses, and for conducting numerical modeling to simulate a targeted application of pore-water extraction.

关键词：放射性废物贮存；提取；坦克；污染物；

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This program was focused on several novel experimental approaches to investigating charge injection and charge transport in organic semiconductors all using infrared (IR) spectroscopy. IR spectroscopy was employed to characterize polymer systems integrated in the architecture of organic field- effect transistors (OFET). These experiments allowed the PI to determine: i) the excitations of the studied organic semiconductors, and ii) their dynamics in high mobility OFETs. The PI proposed to investigate modification of the electronic properties at the surface of organic semiconductors controlled by self-assembled monolayers (SAM) and has completed this work. In addition, the PI has completed a comprehensive study of high mobility, low band gap of Donor-Acceptor (D A) copolymers that are of high interest in view of ambipolar transport in these systems.

关键词：半导体；带隙；场效应晶体管；红外光谱；有机材料

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The development of a bulk nano-grained tungsten material has been the subject of ongoing research at the U.S. Army Research Laboratory (ARL), Aberdeen Proving Ground, MD. While it has been shown that a powder metallurgy approach can lead to bulk nano-grained tungsten material, it has been a persistent challenge to achieve full density. Commercially available tungsten must undergo complex multi-step processes (both hot and cold working) to obtain a fully dense part. Similar procedures may need to be developed to produce fully dense nano-crystalline tungsten. One problem with post-processing procedures is that bulk nano-grained materials are often less ductile than their large grained counterparts. With conventional commercial tungsten, the brittle nature of the material is overcome by incorporating multi-step hot working procedures. However, for nano-tungsten, recrystallization and grain growth become an issue during processing at elevated temperatures. Commercially, rhenium is often added to tungsten to improve ductility and high temperature stability. By adding rhenium to nano-tungsten, enough ductility might be developed to allow for hot working at temperatures low enough to prevent grain growth. Prior to swaging, it needs to be determined whether or not the rhenium addition does impart ductility to nano-tungsten and, if so, at what temperatures and conditions. In order to test the mechanical properties of nano- tungsten with rhenium at high temperatures, the Gleeble unit (a digital version of the 1500 model produced by Dynamic Systems Incorporated, Poestenkill, New York) at ARL was used. The Gleeble is a process simulation machine designed to mimic the thermal and mechanical conditions that arise during processing.

关键词：粉末冶金；钨；细粒物料；冷加工

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Metamaterials are artificially constructed materials. When electromagnetic waves propagate through metamaterials they display properties different from those found in natural materials. These different properties can include negative refraction (light is bent in the opposite direction from that expected from general laws of physics), flat lens focusing, and subwavelength imaging. The use of meta-materials to direct electromagnetic beams is a highly promising approach to overcome current limitations of conformal antennas by improving the radiation characteristics of antenna elements, especially those at the edge of phased array antennas.

关键词：超材料；碳纳米管；保形天线；镜片；高分子材料

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This chapter discusses one engineering application of polybenzoxazines as a highly thermally conductive electronic packaging encapsulant. The combination of various useful properties of benzoxazine resins and their resulting polymers has been demonstrated to render a very high thermally conductive polymer composite. Thermal conductivity value as high as 32.5 W/mK in hexagonal boron nitride-filled polybenzoxazine, up to present, remains the highest reported thermal conductivity value in the literature. Other outstanding properties of the resulting composites as an electronic packaging encapsulant are also discussed in this chapter.

关键词：导热复合材料；高填充复合材料；聚苯并恶嗪；H型氮化硼；高分子材料

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关键词：粉末冶金；石川分析；复合材料

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Polymer-Electrolyte-Fuel-Cells (PEFCs) are promising candidates for powering vehicles and portable devices using renewable-energy sources. The core of a PEFC is the solid electrolyte membrane that conducts protons from anode to cathode, where water is generated. The conductivity of the membrane, however, depends on the water content of the membrane, which is strongly related to the cell operating conditions. The membrane and other cell components are typically compressed to minimize various contact resistances. Moreover, the swelling of a somewhat constrained membrane in the cell due to the humidity changes generates additional compressive stresses in the membrane. These external stresses are balanced by the internal swelling pressure of the membrane and change the swelling equilibrium. It was shown using a fuel-cell setup that compression could reduce the water content of the membrane or alter the cell resistance. Nevertheless, the effect of compression on the membranes transport properties is yet to be understood, as well as its implications in the structure-functions relationships of the membrane. We previously studied, both experimentally and theoretically, how compression affects the water content of the membrane. However, more information is required the gain a fundamental understanding of the compression effects. In this talk, we present the results of our investigation on the in-situ conductivity of the membrane as a function of humidity and cell compression pressure. Moreover, to better understand the morphology of compressed membrane, small-angle X-ray-scattering (SAXS) experiments were performed. The conductivity data is then analyzed by investigating the size of the water domains of the compressed membrane determined from the SAXS measurements.

关键词：燃料电池；能源；固体电解质；聚合物

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