화학공학소재연구정보센터
Molecular Crystals and Liquid Crystals, Vol.581, No.1, 76-82, 2013
Synthesis and Properties of Novel Nonlinear Optical Polyester Containing Nitrophenylazocatecholic Group
A new Y-type polyester (3) containing nitrophenylazocatecholic groups as NLO chromophores, which are parts of the polymer backbone was prepared. Polyester 3 is soluble in common organic solvents such as acetone and dimethylsulfoxide. It shows a thermal stability up to 280 degrees C from thermogravimetric analysis with glass-transition temperature (T-g ) obtained from differential scanning calorimetry near 86 degrees C. The second harmonic generation (SHG) coefficient (d(33) ) of poled polymer film at the 1064nm fundamental wavelength is around 4.42 x 10(-9) esu. The dipole alignment exhibits a thermal stability even at 4 degrees C higher than T-g , and no SHG decay was observed below 90 degrees C due to the partial main-chain character of polymer structure, which is acceptable for NLO device applications.