LC alignment behaviors on polystyrene blend alignment films

ABSTRACT

We prepared blend alignment film based on 4-ethylphenoxymethyl-substituted polystyrene (P4EP) and polystyrene (PS) for liquid crystal (LC) alignment. Stable and uniform LC cells having pretilt angles adjustable from 90^o to 0^o were obtained from these polystyrene blend films having weight contents of P4EP and PS of 1 and 100 weight %, respectively. The LC alignment behavior was well correlated with the wettability of the polymer films. These polystyrene blends having good solubility in many organic solvents and their films having low process temperature can be candidates for LC alignment layer in the flexible display. This study contributes to the latest efforts to develop new alignment layers for pretilt angle control.

KEYWORDS:

• Alignment
• blend
• liquid crystal
• pretilt angle
• polystyrene

Additional information

Funding

This research was supported by Dong-A University Research Fund.