Abstract
AbstractWe used IR dichroism measurements to investigate the mechanism of liquid crystal (LC) alignment in polyimide (PI) films exposed to polarized ultraviolet (PUV) light. After PUV irradiation, we found preferential photodegradation of the PI molecules which were parallel to the PUV polarization direction. The remaining molecular chains of the PI were perpendicular to the PUV polarization direction.
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