Long-time behavior of the azimuthal anchoring strength and easy axis gliding of nematic liquid crystal

We measure the azimuthal anchoring strength and easy axis gliding of the ne matic 5CB on weakly anisotropic substrate. We study the anchoring evolution at a time scale ranging from a few minutes up to a few months. We separate approximately the elastic and the viscous response and we obtain the glidi ng velocity as a function of the applied torque. We discuss the observed gl iding times and nonlinear gliding viscosity.