Figure 7
From: New strategies and implications for the photoalignment of liquid crystalline polymers
Surface-grafted side chain liquid crystal (LC) azobenzene polymers for in-plane photoalignment (case c in Figure 4). Side chain polymers are synthesized by surface-initiated atom transfer radical polymerization (SI-ATRP; PAz) (a) and surface-initiated ring opening metathesis polymerization (SI-ROMP) (b). The polarized ultraviolet-visible absorption spectra of Paz after photoalignment by linearly polarized light (LPL) irradiation for a spincast film (c) and a surface-grafted film synthesized by SI-ATRP (d). The dotted lines correspond to the spectra before LPL irradiation. In each spectrum, the orientation order parameter (S) is indicated. Adapted with permission.98 Copyright 2009, American Chemical Society. A full color version of this figure is available at Polymer Journal online.
