| 초록 |
Recently nonlinear optical (NLO) polymers received a great attention because of their potential applications in the field of electro-optic devices. In the developments of NLO polymers, stabilization of electrically-induced dipole alignment is one of important criteria. Generally, main-chain NLO polymers have good thermal stability, but they often do not dissolve in organic solvents, which make them unusable to fabricate stable noncentrosymmetric films. Side-chain NLO polymer systems have the advantages such as good solubility and high level of NLO chromophore relative to the main-chain systems, but they often suffer from poor stability of dipole alignments at high temperatures. In this work we prepared novel X-type polyurethane containing 4-(2’,2’-dicyanovinyl)-6-nitrocatecholic groups as NLO chromophores, which constitute parts of the polymer backbone. After confirming the structure of the resulting polymer, we investigated its properties. |
