摘要
采用阴离子聚合法制备了浇铸尼龙6(MCPA6)/改性羟基封端聚二甲基硅氧烷(MHPDMS)原位复合材料,研究了不同MHPDMS含量对复合材料在水润滑及干摩擦条件下的摩擦磨损性能影响。结果表明,在干摩擦条件下,复合材料的摩擦系数随滑动时间增加先增大后减小最后达到平衡,随着MHPDMS含量的增加,复合材料在稳定阶段的摩擦系数变化不大,但是磨损量逐渐减小,MHPDMS质量分数为4%的复合材料磨损量仅为MCPA6的25%;在水润滑条件下,复合材料的摩擦系数随滑动时间增加先增大后平衡,随着MHPDMS含量的增加,复合材料的稳定摩擦系数基本没有变化,磨损量先减小后增大,当MHPDMS质量分数为2%时,磨损量最小,为MCPA6的50%左右。复合材料在水润滑条件下的稳定摩擦系数比干摩擦条件下的小,但磨损量比干摩擦条件下的大很多。复合材料在干摩擦条件下的磨损机理主要是粘着磨损和疲劳磨损,而在水润滑条件下主要为犁削磨损和磨粒磨损。
MCPA6 / modified hydropolydimethylsiloxane （MHPDMS） in-situ composites were prepared by anionic polymerization method, the effects of different MHPDMS content on friction and wear properties of the composites under the conditions of dry grinding and in water lubrication were studied. The results show that under the condition of dry grinding, the friction coefficient of the composite first increases, then decreases and achieves balance at last with the increase of sliding time, with the increase of MHPDMS content, the friction coefficient at stable stage changes little, but the wear loss is reduced in turn, the wear loss of the composite with 4% MHPDMS is only 25% of that of MCPA6. Under the condition of water lubrication, the friction coefficient of the composite first increases and then becomes balance with the increase of sliding time, with the increase of MHPDMS content, the stable friction coefficient has no changes basically, the wear loss first decreases and then increases, when the mass fraction of MHPDMS is 2%, the wear loss is minimum, which is only about 50% of that of MCPA6. Compared with the condition of dry grinding, the stable friction coefficient under water lubrication is smaller, but the wear loss is much higher. Under the condition of dry grinding, the wear mechanism is mainly adhesive wear and fatigue wear, under the condition of water lubrication, the wear mechanism is mainly ploughing wear and abrasive wear.
出处
《工程塑料应用》
CAS
CSCD
北大核心
2015年第5期93-96,共4页
Engineering Plastics Application
基金
福建省自然科学基金项目(2012J0101)
福建省科技重大项目(2014H61010109)
关键词
改性聚硅氧烷
浇铸尼龙6
原位复合材料
摩擦磨损
水润滑
modified hydropolydimethylsiloxane
MC nylon 6
in-situ composite
friction and wear
water lubrication
