In this paper we review results of the application of Raman scattering and infrared spectroscopy to the study of molecular dynamics in liquid crystalline polymers. In particular we report on the study of molecular ordering and reorientation and illustrate the results we have obtained in a newly synthesized class of side-chain liquid crystalline polymers belonging to the polyacrylate family. The physical basis and experimental methods necessary for the application of these techniques are also discussed in this paper.