Synthesis and Nonlinear Optical Properties of Novel Ttype Polyurethane Containing Tricyanovinylthiophene

• Published in: Molecular Crystals and Liquid Crystals Vol. 539; p. 442
• Main Authors: Cho, You Jin, Kim, Mi Sung, Lee, Ju-Yeon
• Format: Journal Article
• Language: English
• Published: Philadelphia Taylor & Francis Ltd 11.04.2011
• Subjects: Molecular structure; Optical properties; Polymer films; Polyurethane; Solvents
• ISSN: 1542-1406

A novel T-type polyurethane 7 containing 1-(2,5-dioxyphenyl)-2-{5-(1,2,2-tricyanovinyl)-2-thienyl}ethene groups as nonlinear optical (NLO) chromophores was prepared and characterized. Polyurethane 7 is soluble in common organic solvents such as DMF and DMSO. Polymer 7 shows a thermal stability up to 270...C from TGA thermogram and the ... value obtained from DSC thermogram is around 155...C. The second harmonic generation (SHG) coefficient (...) of poled polymer film at 1560 nm fundamental wavelength is 3.56 x 10... esu. The dipole alignment exhibits a thermal stability even at 5...C higher than ..., and there is no SHG decay below 160...C due to the partial main-chain character of the polymer structure, which is acceptable for nonlinear optical device applications. (ProQuest: ... denotes formulae/symbols omitted.)