School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;
PetroChina Lubricating Oil R & D Institute, Lanzhou 730060, China;
PetroChina Lubricating Oil R & D Institute, Karamay 934003, China;
School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;
polar components; hytrotreated naphthenic rubber process oil;