caa a22 4500 463234006 CHVBK 20180405153251.0 cr unu---uuuuu 170326e20070601xx s 000 0 eng 10.1007/s10853-006-0424-x doi (NATIONALLICENCE)springer-10.1007/s10853-006-0424-x Synthesis and nonlinear optical properties of novel Y-type polyurethanes with high thermal stability of dipole alignment [Elektronische Daten] [Ju-Yeon Lee, Jin-Hyang Kim, Won-Taek Jung, Young Park] 2,3-Di-(2′-hydroxyethoxy)benzylidenemalononitrile (3) was prepared and condensed with 2,4-toluenediisocyanate and 3,3′-dimethoxy-4,4′-biphenylenediisocyanate to yield novel Y-type polyurethanes 4-5 containing 2,3-dioxy benzylidenemalononitrile group as a nonlinear optical (NLO)-chromophore, which constituted parts of the polymer backbones. Polyurethanes 4-5 were soluble in common organic solvents such as acetone and N,N-dimethylformamide. They showed a thermal stability up to 270°C in thermogravimetric analysis thermograms and the glass-transition temperatures (T g) obtained from differential scanning calorimetry thermograms were around 116-135°C. The second harmonic generation (SHG) coefficients (d 33) of poled polymer films at 106.4mm−1 fundamental wavelength were around 9.07×10−19C (2.72×10−9esu). The dipole alignment exhibited high thermal stability up to 10°C higher than T g, and there was no SHG decay below 145°C due to the partial main-chain character of the polymer structure, which was acceptable for nonlinear optical device applications. Springer Science+Business Media, LLC, 2007 Lee Ju-Yeon Department of Chemistry, Institute of Functional Materials, Inje University, 607 Obang-dong, 621-749, Gimhae, Seoul, Korea aut Kim Jin-Hyang Department of Chemistry, Institute of Functional Materials, Inje University, 607 Obang-dong, 621-749, Gimhae, Seoul, Korea aut Jung Won-Taek Department of Chemistry, Institute of Functional Materials, Inje University, 607 Obang-dong, 621-749, Gimhae, Seoul, Korea aut Park Young PDT Research Institute, School of Nano Engineering, Inje University, 607 Obang-dong, 621-749, Gimhae, Seoul, Korea aut Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/11(2007-06-01), 3936-3943 0022-2461 42:11<3936 2007 42 10853 https://doi.org/10.1007/s10853-006-0424-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-006-0424-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lee Ju-Yeon Department of Chemistry, Institute of Functional Materials, Inje University, 607 Obang-dong, 621-749, Gimhae, Seoul, Korea aut NATIONALLICENCE 700 1- Kim Jin-Hyang Department of Chemistry, Institute of Functional Materials, Inje University, 607 Obang-dong, 621-749, Gimhae, Seoul, Korea aut NATIONALLICENCE 700 1- Jung Won-Taek Department of Chemistry, Institute of Functional Materials, Inje University, 607 Obang-dong, 621-749, Gimhae, Seoul, Korea aut NATIONALLICENCE 700 1- Park Young PDT Research Institute, School of Nano Engineering, Inje University, 607 Obang-dong, 621-749, Gimhae, Seoul, Korea aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/11(2007-06-01), 3936-3943 0022-2461 42:11<3936 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer