共查询到17条相似文献,搜索用时 109 毫秒
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综述了我国挤塑聚苯乙烯泡沫塑料(XPS)行业含氢氯氟烃(HCFCs)替代技术的现状和发展趋势;从原料、设备、发泡剂等几个方面阐述了XPS泡沫行业进行发泡剂HCFCs替换的技术难点,并重点分析了替代产品的性能和市场状况。最后,介绍了几种较为成熟的HCFCs替代技术。 相似文献
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综述了几种我国挤塑聚苯乙烯泡沫塑料(XPS)行业含氢氯氟烃(HCFCs)的替代新技术,包括CO2技术、碳氢技术及氢氟烃技术。从发泡剂特性、发泡剂注入计量设备及挤出发泡设备等方面阐述了XPS泡沫行业进行发泡剂HCFCs替换的技术特点及难点。最后,指出CO2发泡技术将是XPS行业未来的发展趋势。 相似文献
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挤塑聚苯乙烯泡沫塑料(XPS)的主要性能及应用领域分析 总被引:1,自引:0,他引:1
详细介绍了挤塑聚苯乙烯泡沫塑料(XPS)的热导率、压缩强度、长期热阻、防潮性能等主要性能指标。阐述了XPS板材的主要应用领域,包括在建筑外墙外保温、屋面保温、地面保温、冷库保温、公路、铁路、渠道工程等领域的应用。详细分析了提高XPS板材阻燃性能的必要性和紧迫性,并提出了在含氢氯氟烃替换过程中XPS泡沫行业的发展趋势。 相似文献
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介绍了我国聚氨酯板材子行业在聚氨酯泡沫行业第一阶段淘汰目标完成和第二阶段HCFCs(含氢氯氟烃)替代工作已启动的情况下,HCFC—141b(一氟二氯乙烷)替代技术的应用情况及与替代技术相配套的泡沫稳定剂和催化剂的应用现状,阐述了泡沫稳定剂和催化剂开发重点。 相似文献
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介绍了我国HCFCs生产行业HCFC-141b淘汰工作和消费领域聚氨酯(PU)泡沫行业HCFC-141b淘汰工作的相关情况,以及《基加利修正案》对氢氟碳化物的管控思路,并简要分析了含氢氯氟烃全面淘汰及氢氟碳化物管控对我国聚氨酯泡沫行业产生的影响。 相似文献
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《化学推进剂与高分子材料》2018,(6)
正生态环境部近日印发公告明确,自2019年1月1日起,任何企业不得使用一氟二氯乙烷(HCFC–141b)为发泡剂生产冰箱冷柜产品、冷藏集装箱产品、电热水器产品。据悉,自2011年我国执行聚氨酯泡沫行业含氢氯氟烃(HCFCs)淘汰计划以来,在冰箱冷柜、冷藏集装箱、电热水器三个行业,开展了30个使用碳氢等低碳环保替 相似文献
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综述了挤塑聚苯乙烯泡沫塑料(XPS)的阻燃技术现状;分析了XPS泡沫塑料的阻燃机理;着重介绍了六溴环十二烷(HBCD)对XPS泡沫塑料的阻燃作用,以及影响HBCD阻燃效果发挥的几种因素。最后,指出了今后XPS泡沫塑料阻燃技术的发展趋势。 相似文献
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Erich C. Weigert Joseph South Sergey A. Rykov Jingguang G. Chen 《Catalysis Today》2005,99(3-4):285-290
The aim of the current study is to determine the feasibility of introducing fuel cell functionality on the surfaces of carbon-based composite materials. This can potentially be achieved by the synthesis of molybdenum carbides on the surfaces of carbon foam, which is a light and rigid material that can be used as structural components in aircrafts and vehicles. The current study employed physical vapor deposition (PVD) to deposit molybdenum on the carbon foam substrate. The ratio of surface molybdenum and surface carbon was determined using X-ray photoelectron spectroscopy (XPS). The combination of PVD and in situ XPS allowed for the synthesis of molybdenum-coated carbon foam samples with desirable and reproducible Mo/C ratios. The coated films were then heated in vacuum to promote the reaction between molybdenum and carbon foam to produce surface molybdenum carbides. The carbide-coated samples were further characterized using XPS, near-edge X-ray absorption fine structure (NEXAFS), and scanning electron microscopy (SEM). Platinum metal was also deposited via PVD on carbon foam, both with and without the presence of molybdenum carbide on the foam surface. The electrochemical stability of Pt-coated foams was evaluated using cyclic voltammetry (CV). 相似文献
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The adhesion and interfacial properties of polyurethane (PU) foams with thermoplastic (TP) materials were investigated using different techniques. The adhesion performance of PU foam with TP materials was evaluated using the peel test method, and the adhesion durability was checked after different climate treatments. X‐ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM), and contact angle measurements were used to study the surface and interface morphology of PU foam and TP material system. Three types of PU foam samples which differ in their composition and also five commercially available TP blends systems, based on poly(carbonate), poly(styrene‐co‐maleic anhydride), poly(acrylonitrile‐butadiene‐styrene), and silicone acrylate rubber have been used. The slow reacting foam shows the best adhesion properties with all the TP materials. The climate treatments strongly effected the PU foam adhesion durability with poly(carbonate) containing TP materials (70–80% loss in adhesion), but nearly no effect with poly(styrene‐co‐maleic anhydride). The samples with lowered adhesion could be separated by peeling without visible foam residues on the TP surface. AFM, XPS, and surface tension studies have shown that the surface properties of the TP material are still governed by the PU foam. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 104: 479–488, 2007 相似文献
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E. Schmadel 《European Journal of Lipid Science and Technology》1968,70(7):491-495
Foam Stabilization and Foam Inhibition After a general review on the field of foam stabilization and foam inhibition in the sector of washing, rinsing and cleansing agents, the recent developments in the field of foam inhibition are treated. According to these recently acquired knowledges, it is possible to regulate the foam formation by varying the temperature, however, independent of the hardness of water. Besides the chemical natures also the mechanisms of foam stabilization and foam inhibition are dealt with. 相似文献