PE-g-MA/PTFE/PA66共混材料摩擦磨损性能研究

摘要

采用熔融挤出的方法制备了马来酸酐接枝聚乙烯(PE-g-MA)或聚四氟乙烯(PTFE)改性的聚酰胺66(PA66)共混物,并用注塑成型的方法制备共混材料试样.通过对材料的力学性能、摩擦磨损性能、动态热力学性能的测试与表征,初步探讨了它们之间的相互影响关系.结果表明,PE-g-MA和PTFE均能显著提高PA66材料的摩擦磨损性能,并随着填充量增加,材料的摩擦因数和体积磨损率持续降低.并且PE-g-MA和PTFE对PA66的摩擦磨损性能具有协同改性作用,当PE-g-MA和PTFE质量分数分别为5％和10％时,材料的综合性能最优.%Maleic anhydride grafted polyethylene (PE-g-MA) or polytetrafluoroethylene (PTFE)modified polyamide-66 (PA66) blends were prepared through melt extruding.The sample of blends was molded by injection.The mechanical properties,friction and wear properties and dynamic mechanical properties of the material were tested,and the interaction between them was explored preliminarily.Results show that PE-g-MA and PTFE can significantly reduce the friction coefficient and volumetric wear rate of PA66 blends,which decrease continually with the increase of their contents.Meanwhile,PE-g-MA and PTFE have the synergistic modification effect on the tribological properties,when the mass fraction of PE-g-MA and PTFE are 5wt％ and 10wt％ respectively,the material shows the best overall performance.