LD7铝合金时效工艺的研究

通过试验系统地研究了ＬＤ７铝合金的单级和两级时效工艺。结果表明，与传统的单级时效相比，两级时效在不降低室温强度，硬度的前提下，可显著提高合金的电导率及高温性能。     

全军表面工程推广网表面技术应用实例

本文根据96年各表面工程推广站技术工作总结中反映的情况，整理出各站在主要表面技术：电刷镀、热喷涂和粘接粘涂方面的应用实例．反映建站以来各站在装备维修中推广应用表面工程技术的实际状况和取得的主要成绩。     

TRIZ理论中物质-场的不同应用

通过对飞机发动机机罩概念设计中的物-场分析，简要概括了在实际的概念设计中应该如何应用和把握物质-场分析的侧重点。     

不同形貌氢氧化镁的化学合成及影响因素

对不同形貌氢氧化镁的化学合成及外部生长环境进行了综述。尤其对影响氢氧化镁结晶性能和形貌起关键作用的因素，如碱性沉淀剂的选择、合成温度的确定、不同镁盐的影响、碱和镁盐的初始浓度及配比、水热处理、反应物的混合方式、晶形控制剂的加入等，进行了详细的阐述。     

A new core–shell type fluorinated acrylic and siliconated polyurethane hybrid emulsion

A novel core–shell type fluorinated acrylic and siliconated polyurethane (FSiPUA) hybrid emulsion was prepared by seeded emulsion polymerization using siliconated polyurethane (SiPU) as a seed and forming the structure with SiPU as a shell and the copolymer of butyl acrylate (BA) with 2,2,2-trifluoroethylmethacrylate (TFEMA) as a core. SiPU was synthesized using isophorone diisocyanate (IPDI), polytetramethylene ether glycol (PTMG), polypropylene glycol (PPG), dihydroxybutyl-terminated polydimethylsiloxane (PDMS), dimethylol propionic acid (DMPA), 1,6-hexanediol (HDO) and triethylamine (TEA). The contents of siloxane and fluorine were determined according to the feed ratio. Fourier transform infrared spectroscopy (FTIR) was used to identify the chain structure of SiPU and FSiPUA. Investigation of transmission electron microscopy (TEM) confirmed the core–shell structure of FSiPUA emulsion and gave the particle size at about 50 nm. The measurement results of water contact angles and the solvent absorptions in water and n-octane for cured films showed that the water and the oil repellency for FSiPUA had been improved significantly with a suitable content of fluorine and siloxane.     

乙苯脱氢氧化制苯乙烯工艺过程分析

对乙苯脱氢氧化工艺过程进行了热力学分析，表明氧化烧氢具有提高平衡转化率和能量合理利用的优点。通过一维拟均相模型模拟计算，比较了乙苯脱氢与乙苯脱氢氧化的反应效果，并由实验得到了验证。同时还讨论了乙苯实验转化率提高不多的原因。     

Torque Transmission Capabilities of Bonded Polygonal Lap Joints for Carbon Fiber Epoxy Composites

Although carbon fiber epoxy composite materials have excellent properties for structures, the joint in composite materials often reduces the efficiency of the composite structure because the joint is often the weakest area in the composite structure.

In this paper, the effects of the adhesive thickness and the adherend surface roughness on the static and fatigue strengths of adhesively-bonded tubular polygonal lap joints have been investigated by experimental methods. The dependencies of the static and fatigue strengths on the stacking sequences of the composite adherends were observed.

From the experimental investigations, it was found that the fatigue strength of the circular adhesively-bounded joints was quite dependent on the surface roughness of the adherends and that polygonal adhesively-bonded joints had better fatigue strength characteristics than circular adhesively-bonded joints.     

A spectroscopic study of the self-association and inter-molecular aggregation behaviour of pH-responsive poly(l-lysine iso-phthalamide)

The pH mediated intra-molecular association and inter-molecular aggregation of a range of amphiphilic poly(l-lysine iso-phthalamide) polymers have been investigated in aqueous solution over a range of pH values and concentrations. The desired functionality of these novel bioresponsive amphiphilic polymers was achieved by incorporating pendant hydrophilic carboxyl groups along the polymer backbone, via the l-lysine moiety, balanced by a degree of hydrophobicity introduced via the iso-phthaloyl moiety. Incorporation of low levels of bis-functional Cy3 (poly-Cy3) and/or Cy5 dye (poly-Cy3/5 or poly-Cy5) co-monomers in the responsive polymer backbone allowed detailed probing of the pH mediated hydrophobic association using a combination of optical spectroscopic techniques. Both steady-state fluorescence spectroscopy and fluorescence lifetime measurements of poly-Cy3 revealed a conformational transition at pH 4.5. Thus, below a critical pH the polymer collapsed into a compact globular structure (hypercoil) bringing the fluorophore molecules into close proximity with one another. This resulted in a dramatic reduction in fluorescence intensity and fluorescent lifetime in the single fluorophore systems (poly-Cy3) accompanied by a red shift in the maximum emission wavelength. Observed redshifts in the emission maxima and enhancements of fluorescent lifetimes with increasing polymer concentration suggested the formation of polymer aggregates. Fluorescence resonance energy transfer (FRET) was measured in mixtures of single fluorophore containing poly-Cy3 (donor) and poly-Cy5 (acceptor) and dual fluorophore containing poly-Cy3 (donor)/Cy5 (acceptor) in an effort to distinguish between intra-molecular versus inter-molecular association. The relevance of the results with respect to potential in vivo applications (drug delivery and biodiagnostics) is discussed.     

出口柑桔中双甲脒及代谢物残留量测定

柑桔样品中双甲脒及代射物在酸性条件下回流水解成2，4－二甲基苯胺，正己烷提取，酸，碱反复液－液分配净化，七氟丁酸酐将2，4－二甲基苯胺衍生成2，4－二甲苯七氟丁酰胺，用配有电子俘获检测器的气相色谱仪测定，外标法定量。