Figure 8
From: New strategies and implications for the photoalignment of liquid crystalline polymers
Surface-grafted side-chain azobenzene liquid crystal (LC) polymers with a diblock architecture, synthesized by surface-initiated atom transfer radical polymerization (SI-ATRP) for in-plane photoalignment (case d in Figure 4). A flexible chain of poly(hexyl methacrylate) (PHMA) is introduced between PAz and the substrate. The figure below indicates the in-plane orientation order parameter (S) achieved by linearly polarized light (LPL) irradiation as a function of temperature during the irradiation procedure. The dashed and solid lines correspond to the data for films with and without the flexible chain, respectively. Adapted with permission.101 Copyright 2012, American Chemical Society. A full color version of this figure is available at Polymer Journal online.
