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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 32, Number 2
BKCSDE 32(2)
February 20, 2011

Title	Synthesis and Properties of Novel T-type Nonlinear Optical Polyurethane Containing Tricyanovinylthienyl Group with Enhanced Thermal Stability of Dipole Alignment
Author	You Jin Cho, Mi Sung Kim, Ju Yeon Lee*
Keywords	Nonlinear optics, Polyurethane, Atomic force microscopy (AFM), Thermal stability, Second harmonic generation, Dipole alignment
Abstract	A novel T-type polyurethane 7 containing 1-(2,5-dioxyphenyl)-2-(5-(1,2,2-tricyanovinyl)-2-thienyl)ethenes as NLO chromophores, which constitute part of the polymer backbone, was prepared. Polyurethane 7 is soluble in common organic solvents such as DMF and DMSO. It shows a thermal stability up to 270 ^oC from TGA thermogram with T_g value obtained from DSC thermogram near 155 ^oC. The second harmonic generation (SHG) coefficient (d33) of poled polymer film at 1560 nm fundamental wavelength is 3.56 × 10^‒9 esu. Polymer 7 exhibits a thermal stability even at 5 ^oC higher than T_g, and no significant SHG decay is observed below 160 ^oC, which is acceptable for nonlinear optical device applications.
Page	424 - 430
Full Text	PDF

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