Synthesis and Properties of Novel Y-Type Nonlinear Optical Polyester with Enhanced Thermal Stability of Dipole Alignment

被引：5

作者：

Jang, Han-Na ^{[1
]}

Lee, Ga-Young ^{[1
]}

Lee, Ju-Yeon ^{[1
]}

机构：

[1] Inje Univ, Inst Funct Mat, Dept Chem, Gimhae 621749, South Korea

来源：

MOLECULAR CRYSTALS AND LIQUID CRYSTALS | 2008年 / 492卷 / 312/[676]-321/[685]期

关键词：

differential scanning calorimetry (DSC); NLO; polyester; relaxation of dipole alignment; SHG coefficient; thermogravimetric analysis (TGA);

D O I：

10.1080/15421400802330788

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

3,4-Di-(2'-hydroxyethoxy)benzylidenemalononitrile (3) was prepared and condensed with terephthaloyl chloride to yield novel Y-type polyester (4) containing the NLO-chromophores dioxybenzylidenemalononitrile group, which constituted parts of the polymer backbone. Polyester 4 is soluble in common organic solvents such as acetone and dimethylsulfoxide. Polymer 4 showed thermal stability up to 300 degrees C in thermogravimetric analysis with glass- transition temperature (T-g) measured from differential scanning calorimetry around 91 degrees C. The second harmonic generation (SHG) coefficient (d(33)) of poled polymer films at the 1064 nm fundamental wavelength was around 4.39 x 10(-9) esu. The dipole alignment exhibited high thermal stability up to T-g due to the partial main-chain character of polymer structure, which is acceptable for NLO device applications.

引用

页码：312 / 321

页数：10