The goal of the Sustainable Painting Operations for the Total Army (SPOTA) program is to significantly reduce the amount of hazardous air pollutant (HAP) emissions produced in coating operations, including adhesives application and removal. Adhesives and sealants account for approximately 5of U.S. Army-wide HAP emissions from surface coating operations. Materials conforming to Federal specification MMM-A-121 have been identified as one of the largest contributors. The purpose of this research is to demonstrate and validate the HAP-free alternative adhesive 3M-847 in place of the baseline materials 3M-1357, Clifton E-1293, and 3M-1300L adhesive for specification MMM- A-121. Based on 2003 data, switching from the baseline adhesives to the alternative 3M-847 would mean an Army-wide reduction of over 1000 lb/year of HAP emissions. This report summarizes the methods for successfully field testing adhesive on an aviation helmet (model no. HGU-56/P) edge beading preventative maintenance/repair and a U.S. Army UH-60 Black Hawk helicopter nose door seal, conducted at Lowe Army Heliport, Fort Rucker, AL. An additional field trial was conducted at Anniston Army Depot, AL, on a Stryker infantry carrier vehicle driver s access hatch seal with successful results. In particular, technicians found that processing the alternative adhesives was similar to that of the baseline, and after 6 months, the adhesive did not have any signs of blistering, delamination (either cohesively or adhesively), substrate failure, or deterioration of any kind. Overall, the HAP-free 3M-847 adhesive was qualified for use on MMM-A-121 requisite substrates, such as vulcanized rubber (styrene-butadiene rubber, neoprene, and nitrile) bonded to unpolished steel, in addition to alternative substrates, such as silicone rubber and lightweight composite materials, showing a high versatility to the 3M-847 adhesive.

关键词：胶粘剂;空气污染;羟基磷灰石；橡胶

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This paper presents an experimental study of the performance of a single track device driving on dry, granular soils. A single-track test rig is used to empirically investigate track motion under controlled track slip and loading conditions on three natural dry granular materials:a dry sandy material with 100 um average grain size, a dry sandy material with 400 um average grain size, and a coarse gravel with 1 cm average particle size. Test conditions can be designed to replicate typical field scenarios for lightweight robots, while key operational parameters such as drawbar force, torque, and sinkage are measured. This test rig enables imposition of velocities, or application of loads, to interchangeable running gears within a confined soil bin of dimensions 1.5 m long, 0.7 m wide, and 0.4 m deep. The tested single track device has an effective contact area measuring approximately 25 cm x 10 cm and it is tested under three vertical loads 125 N, 155 N, and 190 N. Slip is varied within -50and +50during travel over the three soils. The track utilizes a flexible rubber belt equipped with 0.5 cm tall grousers. Experimental measurements are compared against well-established semi-empirical models, to assess the predictive accuracy of these models.

关键词：粒状材料;性能（工程）;履带车辆;干燥材料

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The overall goal of this program was to develop a large area updateable 3D color display using unique and innovative photorefractive (PR) polymers with fast writing times (ms), long persistence (hours) and rapid erasure (several seconds). A multi-pronged approach was used to integrate the presently established materials, find new photorefractive materials, and electronics and photonics techniques to achieve the following goals: (1) 3D display devices: we developed large area PR polymer devices for updateable 3D display; (2). Materials optimization: we designed and synthesized a PR polymer with high figures of merit for 3D display applications; (3) Nanosecond pulse recording: recording setups based on a high repetition rate nanosecond pulsed laser to increase the recording speed were developed; (4) Color holograms: A color 3D display system was implemented by angular multiplexing.

关键词：全息光折变材料;彩色摄影;聚合物;三维流

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关键词：阻尼；镓合金；铁；水利；磁致伸缩

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This study explored the feasibility of using movable and reusable boarding and alighting (B&A) pads at bus stops. Potential design alternatives in terms of materials and structural support for these pads were evaluated. The review focused on the existing and alternative design materials, especially in applications other than for transit purposes, which could potentially replace the existing conventional cast-in-place concrete slab. An online national survey of bus transit agencies was conducted to determine how transit agencies are meeting the Americans with Disabilities Act (ADA) bus stop accessibility requirements and to get feedback and related information on the potential use of movable B&A pads at bus stops. A total of 84 transit agencies from 31 states and Puerto Rico responded to the survey. From the responses, none of the transit agencies were found to be using movable B&A pads. The potential benefits for using movable B&A pads were identified to be lower installation and maintenance cost, ease of installation and use, quicker installation, flexibility, portability, and passenger accessibility. Some potential concerns included lower durability, strength, and stability; greater risk of theft; space limitations; safety; and aesthetics. Six materials (i.e., concrete/asphalt, metal, rubber, thermoplastic, composite, and wood), along with their commercially available products, were evaluated based on their structural performance, long-term durability, adaptability, life cycle cost, aesthetics, and safety and accessibility of transit riders with mobility devices. Out of the six materials, plastic lumber and metal were found to have the highest potential to replace the conventional design. The plastic lumber presents the most viable option but the metallic materials, even though more expensive, have more potential for quicker installation, which can benefit transit agencies with anticipated frequent route changes.

关键词：公共交通；橡胶；上下车（BA）垫；耐久性；材料

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The working condition of the condenser in power plant is an important factor that affects the economic operation of the power plant.Rubber ball cleaning is a main method to deal with the condenser fouling.The thesis,dealing with the problem of counting errors of rubber ball in the process of condenser cleaning,based on CPLD(Complex Programmable Logic Device) technology,designs a programme have rubber balls checking and counting automatically.The program takes use of the controlled laser sensors to count the number of rubber balls in every single pipe and the parallel processing capacity of CPLD,and have the number of different pipes counted and shown.Experiments have proved its constancy and accuracy.

关键词：冷凝器;皮球计数; CPLD;激光传感器;橡胶

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Flame retardant properties of ammonium polyphosphate (APP) and its two kinds of microcapsules,MFAPP with a shell of MF resin and EPAPP with a shell of epoxy resin,were studied in styrene-butadiene-styrene rubber (SBS).The results indicate that the microencapsulation of APP leads to an increase in LOI in SBS compared with APP.When dipentaerythritol is incorporated into the SBS composites containing APP microcapsules,a further improvement in flame retardancy of the composites is observed.Moreover,thermal decomposition behavior and mechanical properties of the SBS composites are investigated.

关键词：可燃性;机械性能; SBS;聚磷酸铵;微胶囊

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The two main objectives of this research were (1) to propose a new subgrade soil stabilization protocol to allow CDOT and other transportation agencies to rely upon an alternative stabilization method that is not subject to the typical problems associated with calcium-based stabilization of sulfate-rich soils (the proposed technology is also appropriate to stabilize sulfate-free subgrade soils), and (2) to develop a new database of MEPDG parameters for local soil samples obtained from CDOT and to provide advanced testing and analysis of the stiffness degradation of these materials. The beneficial use of scrap tire rubber mixed with expansive soils is of interest to civil engineering applications since the swell percent and the swell pressure can be potentially reduced with no deleterious effect to the shear strength of the mixture.

关键词：土壤稳定;硫酸盐;公路建设;混合物;路面;橡胶;

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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 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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