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在美国第45届材料与加工工程促进学会年会与展览共有世界上著名的八家炭纤维公司展出了炭纤维及其复合材料产品,本文简要介绍美国的BP AMOCO公司炭纤维事业的新发 展。 相似文献
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在美国第45届材料与加工工程促进学会年会与展览上,共有世界上著名的八家炭纤维公司展出了炭纤维及复合材料产品。本文简要介绍日本三菱化学公司炭纤维及复合材料的新发展。 相似文献
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分别以含有原始上浆剂的聚丙烯腈基炭纤维及其经过高温除胶处理的炭纤维为增强体,通过沥青浸渍、炭化和高温热处理方法获得了炭/炭复合材料,对获得的复合材料中基体炭的结构和材料的力学性能进行了分析。含有原始上浆剂的炭纤维表面含有较多含氧官能团,易与基体炭形成较强结合的界面,基体炭取向受到限制,在纤维轴向呈竹节状断裂,承载过程中基体炭对炭纤维协同承载作用弱,复合材料表现出了较弱的力学性能。经过高温除胶处理的炭纤维表面几乎没有含氧官能团,易于与基体炭形成弱结合界面,基体炭取向受到的约束小,可围绕炭纤维形成"类同心圆"结构。这种状态下形成的基体炭在纤维轴向连续性较好,复合材料的力学性能较高。 相似文献
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炭纤维复合材料在汽车工业的应用 总被引:3,自引:0,他引:3
介绍炭纤维复合材料在汽车工业应用的现状与前景,包括复合材料在汽车工业应用现状、供汽车应用的低成本炭纤维生产技术研制计划、扩大炭纤维复合材料在汽车工业应用要注意的问题等。 相似文献
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世界高性能炭纤维的现状与发展 总被引:2,自引:0,他引:2
世界高性能炭纤维的现状与发展赵稼祥(北京材料工艺研究所)1.前言高性能炭纤维是先进复合材料的物质基础,是先进结构复合材料最重要的增强材料,也是先进功能复合材料的重要组成部分。了解分析世界高性能炭纤维的现状与发展,对研究发展我国高性能炭纤维有重要意义。... 相似文献
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研究了炭纤维用量对炭纤维/PA66复合材料力学性能的影响,炭纤维长度、分布、含量对炭纤维/PA66复合材料体系摩擦磨损性能的影响。结果表明:复合材料的拉伸强度随着炭纤维用量增加而增大,但质量分数超过15%后,增幅缓慢。在同一载荷下,随着炭纤维用量的增加,复合材料体系的摩擦系数先降低后升高;炭纤维质量分数20%时,复合材料体系的摩擦系数最小,较PA66树脂降低了1/3;相容剂、耐磨助剂用量对炭纤维/PA66复合材料扶正器专用料体系影响较大,适当的用量可以提高扶正器的使用寿命。 相似文献
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乙烯酮(双乙烯酮)是十分重要的化工中间体,其下游产品较多。江苏某化工厂开发生产乙烯酮(双乙烯酮)下游产品三十多个,年生产规模三万多吨,是国内以乙烯酮(双乙烯酮)为中间体生产精细化学品的综合骨干企业。针对乙烯酮(双乙烯酮)下游产品废水特点,该厂结合企业实际,开展了产品优化,结构调整,清洁生产,资源循环利用,节水降耗等工作,从源头削减了污染物的生产。同时投资二千多万元新建预处理装置三套,6000m3/d废水生化处理装置一套,使全厂乙烯酮(双乙烯酮)下游产品的废水得到了有效的治理。 相似文献
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D. G. Gordeev L. F. Gudarenko M. V. Zhernokletov V. G. Kudel’kin M. A. Mochalov 《Combustion, Explosion, and Shock Waves》2008,44(2):177-189
A semi-empirical equation of state for metals is described. Its capabilities are demonstrated by the example of the equation
of state for aluminum. New experimental data are presented on the location of the isentrope of aluminum for unloading from
the state at p = 229.71 GPa on the shock adiabat to an aerogel (SiO2) of density 0.08 g/cm3.
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Translated from Fizika Goreniya i Vzryva, Vol. 44, No. 2, pp. 61–75, March–April, 2008. 相似文献
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Jorge Marcelo Romero Soledad Bustillo Hugo Enrique Ramirez Maisuls Nelly Lidia Jorge Manuel Eduardo Gómez Vara Eduardo Alberto Castro Alicia H. Jubert 《International journal of molecular sciences》2007,8(7):688-694
A thermochemical rather simple experimental technique is applied to determine the enthalpy of formation of Diperoxide of ciclohexanone. The study is complemented with suitable theoretical calculations at the semiempirical and ab initio levels. A particular satisfactory agreement between both ways is found for the ab initio calculation at the 6–311G basis This set level. Some possible extensions of the present procedure are pointed out. 相似文献
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A perturbation viscometer is a differential capillary viscometer that measures the logarithmic viscosity gradient of the viscosity-composition curve for gas mixtures. Measurements are made at different gas mixture compositions. Integration of the logarithmic viscosity gradients measured over the full composition range gives the mixture viscosity relative to the viscosity of one of the pure components of the gas mixture. This method is attractive because, for measurements of equal precision, integration of the gradients is potentially an order of magnitude more precise than measurement of the viscosities directly. It can also work at high and low temperatures and perhaps high pressures.The perturbation viscometer has been used to make measurements on ideal gas mixtures at ambient and elevated temperatures. The situation is more complicated when the gas mixtures are non-ideal. Extra effects due to density differences, molar volume change on mixing and differential thermal expansion may be measured in addition to the desired viscosity change producing systematic errors in the results. Thus, a more sophisticated apparatus is required. The standard perturbation viscometer has been modified to separate out the extra effects to permit measurement of the true change in viscosity. In addition, the theoretical operation of the modified apparatus has been revised to account for the design changes to permit calculation of the viscosity-composition profiles from the results.The apparatus has been tested using helium-HFC-125 mixtures and two new viscosity-composition profiles are presented for these mixtures at 23 and . Internal consistency tests have been used to confirm that the data produced are of high quality with an estimated uncertainty in the viscosity ratio data at of 0.9% and at of 1.5%. 相似文献
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塔设备改造选型的分析 总被引:2,自引:0,他引:2
就当前扩产增容中塔设备设计和改造时板式塔和填料塔的选型问题加以分析。在评述目前国内常用的几种塔板和新型填料之后,着重介绍一种新型塔板(导向梯形浮阀塔板)和一种新型填料(波环填料——乾隆帕克)。 相似文献