FTIR polarization spectroscopy was used to investigate the orientational behavior of the different constituents of an LC block copolymer (polyester imide) during uniaxial elongation at different temps. Differences in the degree of alignment as well as in the response to mech. load was obsd. With increasing temp. the level of the applied stress and the induced orientation decrease, while the differences in the orientational behavior of the mesogen and the flexible spacer were retained.