| 초록 |
Materials with nonlinear optical (NLO) activities have been extensively studied because of their potential applications in the field of electro-optic devices including ultrafast optical switches and high-density storage media. Main-chain NLO polymers have good thermal stability of dipole alignments, 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 a new X-type polyurethane containing 4-(2’,2’-dicyanovinyl)-6-nitroresorcinoxy groups as NLO chromophores, which constitute parts of the polymer backbone. After confirming the structure of the resulting polymer, we investigated its properties such as solubility, thermal stability, and NLO activity. |
