Research Progress on the Relationship Between Molecular Structure and Properties of Poly-α-olefins Synthetic Base Oil
This paper introduces the relationship between the molecular structure and properties of poly-α-olefins(PAO)synthetic base oil,including the relationship between molecular structure and viscosity,viscosity index and low-temperature fluidity.By analyzing the relationship between the existing PAO molecular structure parameters and viscosity,viscosity index,and low-temperature fluidity,the main molecular structure parameters affecting the viscosity are sorted out:relative molecular mass,branch number,branch length,and molecular effective length.The branch number,branch length,and branch position in the molecular structure have an important influence on the viscosity index;the branch number and branch length have an important effect on the low-temperature flow properties;the PAO molecular structure(similar to star type)with few branches and long length is an ideal structure with good viscosity-temperature performance and low-temperature fluidity.Therefore,the relationship between the molecular structure and properties of PAO was studied at the molecular level to extract a new idea for designing and preparing the ideal structural components of high-performance PAO base oil,so as to provide theoretical support and scientific guidance for the upgrading of PAO base oil products and the development of new technologies.
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