共查询到19条相似文献,搜索用时 112 毫秒
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橡胶阻尼材料研究进展 总被引:13,自引:4,他引:13
介绍了近几年橡胶阻尼材料的研究进展。橡胶阻尼材料的设计原则是:尽量使滞后损失大,损耗模量高,储存模量低,有效阻尼温度范围宽。影响橡胶阻尼材料减震性能的因素有:材料形态结构,使用温度和振动频率、聚合物共混体系并用比及配合剂种类和用量。橡胶与橡胶、塑料、纤维共混,橡胶接枝和嵌段共聚以及材料结构改进是目前提高橡胶阻尼材料减震性能的主要方法。利用填料压电、压磁等性能制备新型减震材料是阻尼材料的发展方向。 相似文献
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阻尼涂料的阻尼性能影响因素 总被引:6,自引:2,他引:6
本从涂料组成、涂层结构和外界条件三方面,较全面研究了在约束阻尼中影响阻尼性的主要因素。探索了通过阻尼层组成和涂层结构的优化提高结构阻尼性能的途径。 相似文献
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为了更真实地表征高分子材料的阻尼减振性能,定义了阻尼减振参数Z.制备了不同填料含量的聚氨酯阻尼材料,利用传统的动态黏弹仪测试了它们的动态力学性能,同时也用所定义的参数Z表征了材料的阻尼减振性能。将所制备的阻尼材料敷设到钢板上,制备得到了自由阻尼层结构。利用动态信号采集与分析系统对结构的阻尼减振性能进行了测试,并由此得到了材料真实的阻尼减振性能。实验结果表明,参数Z可以更加真实地反映材料的阻尼减振性能。阻尼材料的阻尼减振性能和材料的损耗因子和弹性模量密切相关。 相似文献
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阻尼材料的研究状况及进展 总被引:3,自引:1,他引:2
阐述了阻尼材料的基本概念和阻尼作用的基本原理,回顾了阻尼材料发展的三个阶段,简单介绍了阻尼材料的性能评价方法和大致分类,并分别对粘弹性阻尼材料、复合阻尼材料和智能型阻尼材料的研究状况及进展进行了详细的评述和分析. 相似文献
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浇注型聚氨酯阻尼材料研究进展 总被引:1,自引:0,他引:1
从无机填料、互穿聚合物网络(IPN)技术、分子结构设计3个方面分析了目前国内浇注型聚氨酯阻尼材料研发现状,指出分子结构设计是制备高强度、高阻尼、耐动态疲劳性能的聚氨酯阻尼材料的有效方法之一。 相似文献
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Peter Müller 《大分子材料与工程》1997,244(1):121-133
The world-wide production of polyurethanes has exceeded 6 mio. metric tons in 1994. Compared with the produced amounts of large-scale thermoplastics such as PE, PVC, PP and PS, polyurethanes keep the 5th place. Polyurethanes (PUR) are segmented polymers, which can be synthesized from preformed building blocks in a modular unit construction system. The chemical modules and the various possibilities of combination will be discussed here. Tailor-made polyurethane materials can be divided into two main-fields of application: foams and compact PUR. The main constituents of polyurethane materials are diisocyanates and polyols. These key- chemicals are well characterised with respect to their technological, economical and ecological properties. Taking into account the availability, the masses of production and the experiences that have been collected with the PUR main constituents, these PUR precursors seem to be very mature already. In contrast to this, the PUR-materials made from these building blocks still offer numerous novel problem-solutions, resulting from the variability of the diisocyanate-poly-addition reaction: PUR materials are most commonly segmented into several phases. The formation of hard- and softsegments can be easily demonstrated by looking at thermoplastic polyurethanes (TPU). A deeper understanding of this phase separation and the molecular organisation within these materials promises to realize prospectic polymeric architectures with new and improved properties. PUR materials will still be able to offer new answers to future requirements in balancing economical and ecological needs. By looking at the life-cycles of soft and hard-foams, polyurethane-coatings and thermoplastic PUR-elastomers, this contribution will adress the question: “Is PUR-chemsitry still a challenging field?” 相似文献
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采用硫化特性参数、溶胀指数和DSC谱图等表征了聚氨酯橡胶(PUR)/氯丁橡胶(CR)共混胶的共硫化性能,并研究了PUR/CR的共混比、补强体系与软化体系等对共混胶的硫化特性的影响.结果表明,采用过氧化二异丙苯/氧化镁(DCP/MgO)复合硫化体系,可以使PUR/CR共混胶达到共硫化;增加PUR和炭黑的用量,减少软化剂的用量,则共混胶料的转矩增大;增加PUR用量,可以加快共混胶料的硫化速度,其它因素对硫化速度的影响不明显.当PUR/CR共混比为20/80、DCP 3份、MgO 4份、炭黑N550 30份、软化剂聚异丁烯(PIB)5份时,共混硫化胶有较好的综合性能. 相似文献
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For the sustainability of the polyurethane resin (PUR) industry, petroleum-based materials must be replaced with renewable resource and economic aspects must be considered. Lignin is a renewable, thermostable biomass consisted with a phenolic polymer. As a thermostable bio-filler for PUR adhesives, acidic or basic lignin was blended with an amphiprotic inorganic filler, to reduce the resins and product costs due to cheap, unmodified materials. The thermal resistance of the PUR adhesives was evaluated by measuring adhesion before and after heating and with and without a mechanical effect caused by substrate penetration. The results show that after heating at 200°C, the PURs containing 7.5 or 15 wt% of dealkaline lignin or 7.5 wt% of alkaline lignin decomposed more slowly than the lignin-free PUR. The properties of the PURs were also analyzed using Fourier-transform infrared spectroscopy and differential scanning calorimetry. Additionally, the PURs containing over 30 wt% of dealkaline lignin show potential as environmentally friendly water-blown PUR foams. 相似文献
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