Abstract
The orientation effect of liquid crystal and polyimide molecules on the Langmuir–Blodgett (LB) films was studied. The orientation degree of polyimide chain in the LB films is less than that in the strong rubbing films. This result may be due to bad linear structure of polyimide. The 9 or 11 LB film layers may well align liquid crystals, but the orientation effect of liquid crystals on the polyimide LB films is worse than that on the strong rubbing films. The surface azimuthal anchoring energy of liquid crystals on the polyimide LB films was measured by a torque balance method proposed by our group. The intermolecular interaction between liquid crystal and polymer molecules is considered to be very important for aligning liquid crystals on the polymer surface.
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