Effect of Synthetic Conditions and Thickener Formulation on the Rheological and Tribological Properties of Polypropylene Grease  

作　　者：He Boyang 

机构地区：[1]Business and Economics,University of Melbourne,Melbourne Vic 3000,Australia

出　　处：《China Petroleum Processing & Petrochemical Technology》2023年第4期164-174,共11页中国炼油与石油化工（英文版）

基　　金：the financial support provided by the National Natural Science Foundation of China Project (U21A20315,21978186);the Fund for Shanxi“1331 Project” (1331)。

摘　　要：Polypropylene(PP)grease holds great potential for special industrial applications.In this study,synthetic conditions,thickener content,and the ratio of two different molecular weight PPs were investigated systematically using a rheometer,scanning electron microscope,X-ray diffraction,Fourier transform infrared spectrometer,oscillating tribometer,and 3D surface profiler measurements.The results showed that suitable synthetic conditions are two quenching cycles,and the synthetic temperature and time is 240℃for 12 h.The rheological analysis showed that thickener content and different proportions of the two PP molecular weights have a significant influence on the rheological properties of PP grease.High molecular weight PP(H-PP)has a stronger thickening ability than low molecular weight PP(L-PP).The higher the amount of H-PP in the fixed thickener content or the higher the thickener content with a specific proportion,the higher the viscoelasticity of PP grease.The tribological performance is related to the rheological properties.The proportion of two different molecular weight PPs in the thickener content should be appropriate;excessive H-PP content leads to lubrication failure.

关 键 词：polypropylene grease synthetic conditions thickener formulation rheological properties tribological properties 

分 类 号：TG1[金属学及工艺—金属学]