聚苯酯填充聚四氟乙烯机械性能和摩擦学性能研究

发布时间：2018-01-04 17:14

本文关键词：聚苯酯填充聚四氟乙烯机械性能和摩擦学性能研究　出处：《润滑与密封》2017年01期 　论文类型：期刊论文

【摘要】：采用冷压-热烧结法制备聚苯酯(POB)改性聚四氟乙烯(PTFE)复合材料,考察聚苯酯含量以及在110℃的航空液压油中浸泡后对改性PTFE材料机械性能和摩擦磨损性能的影响。试验结果显示:改性PTFE材料的硬度与聚苯酯含量成正比,而拉伸强度和拉断裂伸长率与聚苯酯含量成反比;改性PTFE材料的摩擦因数随聚苯酯含量增加先增大后减小,体积磨损率则呈减小趋势;改性PTFE材料的摩擦因数随着载荷增大而减小,而磨痕宽度随载荷的增大而增大;质量分数20%聚苯酯改性PTFE的综合性能最优,并且具有很好的稳定性,在航空液压油浸泡后其性能变化不明显。
[Abstract]:By cold pressing and hot sintering preparation of polyphenyl ester (POB) modified polytetrafluoroethylene (PTFE) composites, effects of Ekonol content and aviation hydraulic oil in 110 DEG C after immersion of modified PTFE materials for mechanical and tribological properties. The effects of test results show that the modified PTFE material hardness and polystyrene the ester content is proportional to the tensile strength and tensile elongation at break and polyphenyl ester content is inversely proportional to the friction coefficient; modified PTFE material increased firstly and then decreased with Ekonol content increased, the volume wear rate is decreased; the friction coefficient of the modified PTFE material decreases with the load increasing, the wear scar width increases with the increase of the increase of the load; the optimal comprehensive performance of 20% mass fraction of polyphenyl ester modified PTFE, and has good stability, in aviation hydraulic oil soaked the performance does not change significantly.

【作者单位】：陆航驻洛阳地区军事代表室;豫北机械厂;中国科学院兰州化学物理研究所;
【基金】：国家973项目(2015CB057500) 国家自然科学青年基金项目(51305431)
【分类号】：TB332
【正文快照】： 聚四氟乙烯(PTFE)性能优良,有“塑料王”的美誉,是目前应用于动密封的关键材料,但其在使役过程中,易冷流,抗蠕变和回弹性能差,导致聚四氟乙烯密封材料的密封可靠性和寿命难以满足实际应用的需求[1-3]。因此在实际使用过程中,可将聚四氟乙烯与其他材料进行复合,在保持聚四氟乙

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