摘要
选用聚四氟乙烯(PTFE)、石墨、MoS2 3种耐磨改性剂,通过熔融共混法制备聚甲醛(POM)耐磨材料。研究了耐磨改性剂含量对材料力学性能和摩擦磨损性能的影响,并借助扫描电子显微镜(SEM)分析了材料的磨损表面形貌。结果表明,3种耐磨改性剂使POM耐磨材料的力学性能有所下降,但下降幅度并不大。3种耐磨改性剂改性的POM耐磨材料的摩擦磨损性能均得到不同程度的改善,其中PTFE的改善效果最大,当PTFE质量分数为8%时,材料摩擦系数为0.21,较纯POM降低了38%,磨损体积为5×10–4 cm3,较纯POM降低一个数量级。SEM结果表明,PTFE在POM表面形成了均匀分散的转移膜。
Polyoxymethylene (POM) wear-resistant materials filled with three kinds of abrasion modifiers including polytetrafluoroethylene (PTFE), molybdenum bisulfide and graphite were prepared by melt blending. The influences of the abrasion modifiers contents on the mechanical properties and friction and wear performances of the materials were studied, and the wear surface morphologies of the materials were investigated by scanning electron microscopy (SEM). The results show that the mechanical properties of the materials decrease slightly after adding the three kinds of abrasion modifiers. The friction coefficient and wear volume of the materials filled with the three kinds of abrasion modifiers all are lower than that of unfilled, and the material filled with PTFE shows the highest wear resistance among all POM wear-resistant materials. When the PTFE content is 8wt%, the friction coefficient and wear volume of the material filled with PTFE is 0.21 and 5×10^-4cm^3 respectively, which is reduced by 38% and an order of magnitude compared with pure POM. The SEM result shows that PTFE forms a uniform transfer film on the surface of POM.
出处
《工程塑料应用》
CAS
CSCD
北大核心
2014年第7期34-37,共4页
Engineering Plastics Application
关键词
聚甲醛
耐磨材料
力学性能
摩擦磨损性能
polyoxymethylene
wear-resistant material
mechanical property
friction and wear performance