| 초록 |
CBDA and CBDA-DAPM-DA consisted of the photo-sensitive cyclobutane tetracarboxylic group, which is easily decomposed under UV light exposure by cyclobutane ring opening reaction. Photo-reactivity of photo-decomposible polyimide was studied with and without reactive monomer, RM257 and photo-initiator, DMPA. Recently photo reactive monomers have been draw attention for better alignment of liquid crystals and broad viewing angle. Interfacial effects as well as macro molecular interaction have been studied to enhance anchoring energy of liquid crystal. After irradiation, polyimide film gives LC alignment, perpendicular to polarization direction of the UV irradiation. And we exposed to linearly polarized UV the angle vertically or horizontally by measured the degree of LC alignment. Photo-decomposible polyimide reacts very efficiently with UV light. |
