共查询到18条相似文献,搜索用时 219 毫秒
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室温快速固化高性能环氧树脂胶粘剂研究 总被引:1,自引:0,他引:1
为了提高胶粘剂在室温条件下的固化速度,并改善其力学性能,研究了固化剂含量、填料含量对环氧树脂胶粘剂固化速度和力学性能的影响.结果表明,当固化剂含量为95~100 phr,填料含量为60~ 80 phr时,胶粘剂的综合性能最好;该新型胶粘剂在室温12 min即可快速固化,剪切强度可达13.8 MPa,拉伸强度和弯曲强度分别达到了43.1MPa和83.2 MPa. 相似文献
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环氧树脂胶粘剂是以环氧树脂为主体配制而成的。树脂大分子末端有环氧基,链间有羟基和醚键,并在固化过程中还会继续产生羟基和醚键,结构中含有苯环和杂环,这些结构决定了环氧树脂胶粘剂具有优异的性能。环氧树脂胶粘剂是一种使用历史较久, 相似文献
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根据微波快速固化、均匀制热的机理,研制开发了全新的微波快速胶接修复机,并进行了性能测试.测试结果证明,该技术能很好地满足飞机等装备一般结构件的胶接修复要求. 相似文献
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用胶接抢修的微波固化温度监控原理,设计了由数字温度传感器DS18820、AT89S51单片机、液晶显示器和继电器控制电路组成的微波固化温度监控系统,并设计了系统的驱动软件。Pro-teus仿真结果表明,系统的软、硬件设计正确。该系统结构简单,控温效果精确。用于胶接修复,可显著提高修复强度。 相似文献
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室温快速固化纳米环氧胶粘剂的力学性能 总被引:2,自引:0,他引:2
对纳米SiO2进行表面修饰获得了稳定的悬浮液,将改性纳米SiO2以溶液共混法加入到胶粘剂中,制备出一种室温快速固化纳米环氧胶粘剂.透射电子显微镜下可观察到,经表面活性剂改性后的纳米SiO2比较均匀地分散在环氧胶粘剂中,粒径约为30nm,提高了胶粘剂剪切强度值.利用扫描电子显微镜观察了固化物断口形貌,发现当基体受到冲击时,纳米粒子与基体之间产生大量银纹,消耗了大量能量,起到了增韧增强的作用.此外,分析并讨论了纳米SiO2对胶粘剂的力学性能影响. 相似文献
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固化方式和纤维表面处理对碳纤维-树脂界面化学组成的影响 总被引:1,自引:0,他引:1
对碳纤维进行低温等离子法表面处理,分别在室温和微波固化条件下将碳纤维与环氧树脂复合成型,制备出碳纤维复合材料.采用原子力显微镜、拉曼光谱对碳纤维表面形貌和微观结构进行表征,采用扫描电镜和能量散射光谱对碳纤维-树脂界面区形貌和元素分布进行表征.结果表明,碳纤维经处理后,表面无序结构比例增大,有利于提高纤维的微波吸收能力,使微波固化复合材料的界面结合比室温固化复合材料更牢固.经过表面处理的碳纤维与树脂形成良好的化学键合,S i元素在复合材料界面区发生偏聚. 相似文献
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介绍Solid Works在环氧浇注成型模具设计中的应用,并应用Moldflow对模具浇口位置,流动性能进行分析,对三维CAD技术在模具成型产品开发过程中的应用作了有益的尝试和探索. 相似文献
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It is shown by X-ray point analyses and line scans that the concentrations of sodium and potassium, as crown ether complexes, in epoxy resin may not be of uniform distribution. The concentrations may be substantially higher in a thin layer at the base of the block. It is recommended that chemical analysis of a selected central region of a block, not the intact block, be carried out to establish the true concentration. This may be substantially lower than the nominal concentration. This problem appears to be less acute with cryptate complexes of sodium and potassium but a similar trend is nevertheless apparent. 相似文献
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This paper deals with the effect of a multi-walled carbon nanotube (MWCNT) reinforcement on the wear behaviour of Epoxy (EP)
composites. Firstly, various dispersion methods were compared. Secondly, the optimum CNT amount was evaluated. In a third
step, dry lubricants were added to the optimised EP/CNT composite. Finally, the influence of the steel counterpart (martensitic
bearing steel 100Cr6 and austenitic stainless steel X5CrNi18-10) was studied. The preparation method was found to have a decisive
effect on the wear behaviour of the composite. A pre-treatment of the CNTs in concentrated nitric acid proved beneficial.
Even more important was the mixing method. A dual asymmetric centrifuge delivered so good wear results that the pre-treatment
could be skipped. The optimum CNT content was at about 1 wt%, regardless of the preparation method. The lowest wear rates
were found after addition of 10 wt% graphite. MoS2 proved to be less effective and Polytetrafluorethylene (PTFE) even increased the wear. The wear rates against the unalloyed
martensitic steel were far higher than against austenitic stainless steel. 相似文献