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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 Tg 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 Tg, and no significant SHG decay is observed below 160 oC, which is acceptable for nonlinear optical device applications.
Page
424 - 430
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