Synthesis and electro‐optic properties of novel polyurethane containing the nitrophenylazoresorcinoxy group |
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| Authors: | Mi Sung Kim Mi Young Song Byeongman Jeon Ju‐Yeon Lee |
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| Affiliation: | Institute of Basic Science, Department of Chemistry, Inje University, 607 Obang‐dong, Gimhae 621–749, Korea |
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| Abstract: | A novel Y‐type polyurethane (polyurethane 3) containing 4‐(4‐nitrophenylazo)resorcinoxy groups as nonlinear optical (NLO) chromophores, which constitute part of the polymer backbone, was prepared and characterized. Polyurethane 3 is soluble in common organic solvents such as acetone and N,N‐dimethylformamide. It shows thermal stability up to 270 °C from thermogravimetric analysis with a glass transition temperature obtained from differential scanning calorimetry of 102 °C. The second harmonic generation (SHG) coefficient (d33) of the poled polymer film at 1064 nm fundamental wavelength is 2.06 pm V?1. Polymer 3 exhibits thermal stability up to Tg, and no significant SHG decay is observed below 100 °C, which is acceptable for nonlinear optical device applications. Copyright © 2012 Society of Chemical Industry |
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| Keywords: | nonlinear optical polyurethanes differential scanning calorimetry thermogravimetric analysis atomic force microscopy second harmonic generation |
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