Nano/micro-reological characteristics of polymeric lubricant for hard disk drive

Rheological properties of shear viscosity and dynamic moduli of perfluoropolyether (PFPE) with different molecular weights and end group functionalities were measured. Molecular simulation of non-equilibrium molecular dynamics (NEMD) was also performed to provide a molecular visualization tool to predict shear viscosity, which reveals a strong dependence on temperature and PFPE molecular architecture.