| 초록 |
The morphology, grating formation dynamics and electro-optical performance of holographic polymer dispersed liquid crystals (HPDLC) were investigated with the addition of triallyl isocyanurate to the formulations of conventional polyurethane acrylate based HPDLC. The transmitted beams and reflected beams were detected with a photodiode detector. The morphology of the HPDLC gratings was characterized by scanning electron microscopy (SEM). HPDLC with tiallyl isocyanurate increased the gap of solubility parameter between polymer and LC, and the polymer elasticity leading to the increased mismatch of refractive indices. The diffraction efficiency of the films increased with the addition and increasing amounts of tiallyl isocyanurate due to the increased phase separation between polymer and liquid crystal (LC) droplet. |
