| 초록 |
Optical anisotropy of PVA/dye polarizing films results from the molecular orientation of dyes in stretched PVA films. The orientation of dyes makes the transition dipole moment vectors of dye molecules lie at a specific direction and maximum absorption of light in the visible wavelength range occur at that direction. Therefore, the effective orientation of dye molecules in accord with the drawing direction of host PVA films is the most important element in preparing polarizing films. In this study, a variety of azo dyes were synthesized and PVA polarizing films were prepared using those dyes. The effect of dye structures on the orientation behavior of dyes in stretched PVA films was examined on the basis of optical properties(transmittance, degree of polarization, dichroic ratio and order parameter) of polarizing films. |
