| 초록 |
Polymers with large nonlinear optical (NLO) activities are of great interest because of their vast applications in optoelectronic technology, such as telecommunications and optical data storage. Because of their good processability and chemical flexibility, NLO polymers are more attractive compared with the traditional inorganic materials. In the developments of NLO polymers, stabilization of electrically-induced dipole alignment is one of important criteria. A polyurethane matrix forms extensive hydrogen bonding between urethane linkages, with increased rigidity preventing the relaxation of induced dipoles. Physically cross-linked systems via hydrogen bonds have the advantages such as homogeneity and good processability relative to chemically cross-linked systems. In this work we prepared novel X-type polyurethane containing 4-(4-nitrophenylazo)-6-nitroresorcinoxy groups as NLO chromophores and investigated its properties. |
