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We investigate control of the photoinduced orientation of photoalignable polymeric films from polymethacrylate with 4-oxybenzaldehyde side groups (1) and monomeric 4-methoxyanilline (2) composites, where both 1 and 2 have no photoreactivity. Annealing the 1/2 composite film with various 1/2 ratio generates N-benzylideneaniline (NBA) side groups, which exhibit photoreactivity and photoinduced molecular...
The photoinduced reorientation behaviors of liquid crystalline (co)polymethacrylates (LCPs) comprised of N-benzylideneaniline (NBA) and 4-cyanobiphenyl or 4-methoxybiphenyl side groups are compared using linearly polarized (LP) 313 nm and LP 365 nm light. LCP films realize effective cooperative reorientation based on trans-cis-trans photoisomerization of the NBA moieties using LP 365 nm light and...
A new photo-cross-linkable liquid crystalline polymer (PLCP) comprised 4-methoxycinnamoyloxy groups connected with a bistolane side group was synthesized to investigate thermally enhanced photoinduced molecular reorientation of a thin film with linearly polarized (LP) 365nm light exposure. Due to the axis-selective photoreaction of the cinnamate groups followed by the thermally induced self-organization,...
Effects of liquid-crystal droplet size on orientational photorefractive properties of the polymer dispersed liquid crystals are investigated experimentally. The composites consist of the same chemical components, but the liquid crystal droplet size was varied by controlling the fabrication process. Particular attention is given to the observation and qualitative and/or quantitative modeling of the...
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