| 초록 |
Main-chain nonlinear optical (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 advantage of good solubility 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 polyester 5 containing 4-(2’,2’-dicyanovinyl)-6-nitroresorcinoxy groups as nonlinear optical chromophores, which constitute parts of the polymer backbone. Polyester 5 is soluble in common organic solvents such as N,N-dimethylformamide and acetone. Polymer 5 shows a thermal stability up to 250 oC from thermogravimetric analysis with glass-transition temperature obtained from differential scanning calorimetry of near 109 oC. Nonlinear optical properties of poled polymer film are under progress. |
