共查询到20条相似文献,搜索用时 78 毫秒
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高性价比氟涂料的研究 总被引:3,自引:1,他引:3
为了开发一种性价比高的含氟涂料,通过分子设计合成了一种常温固化低氟树脂,用XPS(X射线光电子仪)检测了树脂成膜后含氟成分的分布情况,测量了涂膜与纯水的接触角,把树脂分离提纯除去含氟均聚物和未反应氟单体后,测量了聚合物的红外光谱图,因而推断了合成树脂的分子结构.应用合成树脂制作了一种含氟涂料,并检测了色漆涂膜耐蚀、耐候、耐盐雾等性能.试验结果表明:通过分子设计合成的氟树脂成膜时产生了较大趋向作用,含氟基团向空气/聚合物界面伸展,对聚合物内部分子形成很好的保护作用;低氟树脂涂料具有优异的耐候性能和耐蚀性能;研制的涂料具有性价比高的特点. 相似文献
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有机硅改性氟树脂涂料具有卓越的耐候性、耐腐蚀性、低表面能、化学稳定性等优点,因此成为一类发展迅速且应用广泛的新型材料.综述了有机硅改性氟树脂的不同制备方式,简介了有机硅改性氟树脂涂料的不同应用方面并展望了其发展方向. 相似文献
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环氧改性氟树脂涂料研究 总被引:6,自引:0,他引:6
用环氧树脂改性偏二氟乙烯-四氟乙烯-六氟丙烯共聚物(氟树脂246),可以大大提高氟树脂在底材表面的附着力。实验结果表明,改性氟树脂涂料有良好的机械性能和耐有机溶剂性能,具有广泛的应用前景。以大 相似文献
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赵宗治 《Journal of Flame Retardant Material and Technology》1997,(5):11-13,4
本文介绍了我国防火涂料的发展过程及技术标准。 相似文献
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本文针对介入治疗技术中管腔内支架表面改性的研究进展,评述了无机涂层、有机涂层、药物涂层及其他涂层的制备技术、实验结果与作用机理,并对未来管腔内支架表面涂层的研究趋势作了分析。 相似文献
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《Materials at High Temperatures》2013,30(4):249-259
AbstractThe paper describes aspects of thermal barrier coating (TBC) microstructure and the physical and mechanical properties which they influence. The stress-strain behaviour of air plasma sprayed (APS) TBCs is discussed, including the role of residual stresses. Failure phenomena as well as the TMF behaviour of TBC coated nickel base superalloys are described. The role of bond coat oxidation on TBC life is discussed as well as some mechanical properties of vacuum plasma sprayed MCrAlY-bond coatings. Finally, life prediction methodologies are addressed and discussed in terms of a critical strain accumulation concept. From this is derived an equation which covers time dependent effects such as bond coat oxidation and sintering. The paper concludes with a brief summary of the evolution of TBCs in aero and industrial gas turbines, and the failure modes in each. In particular the increased importance of erosion, in industrial gas turbines, due to water injection is highlighted. 相似文献
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R. Jayachandran M. C. Boyce A. S. Argon 《Journal of Computer-Aided Materials Design》1995,2(2):151-166
Summary Indentation is often a mode of in-service loading for a thin coating deposited on a substrate. Under such a loading, the strong adherence of the coating to the substrate is a basic necessity for successful performance of the coating. In this study, we investigate the indentation behavior of thin single and multilayered polymeric coatings using the finite element method. The deformation patterns and the stress fields that are generated during indentation are obtained by employing constitutive models which accurately represent the elastic-viscoplastic and hyperelastic behavior of the glassy and rubbery states of the polymeric layers under investigation. Three types of loading conditions are considered: indentation to (1) a fixed depth; (2) a fixed work; and (3) a fixed force. For these loading conditions, we then investigate the mechanical performance of various composite coatings subjected to an overall thickness design constraint. The composite structure is altered via variation in individual layer material composition, layer thickness and layer arrangement. It is shown how the placement of different material layers in a multilayer coating can alter the flow pattern and hence the distribution of stress state and resulting failure. It is also shown that a soft rubber elastic layer acts to greatly minimize the interfacial shear stress at the substrate, thereby reducing the risk of delamination of the coating, but the presence of the rubber can also produce detrimental tensile stresses on the surface. We then demonstrate that the tensile stress state can be eliminated through manipulation of the rubber layer thickness, without increasing the interface shear stress. Through these examples, a framework for evaluation and design of multilayer coatings for indentation resistance is provided. 相似文献