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Nonlinear optical polymers with novel benzoxazole chromophores II. Synthesis of polyurethanes with good thermal stability

✍ Scribed by Ki Hong Park; Woong Sang Jahng; Sun Jin Lim; Sangyup Song; Dong-Ho Shin; Nakjoong Kim

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
743 KB
Volume
30
Category
Article
ISSN
1381-5148

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✦ Synopsis

Novel dial monomer having a n-conjugated benzoxazole ring, 2-(4-nitrophenyl)-6-IN,N-bis(2-hydroxyethyl)amino]benzoxazole was successfully synthesized to improve the thermally stability of nonlinear optical chromophores.

Several polyurethanes bearing pendant benzoxazole chromophores were obtained by polyaddition of the diol to various aromatic diisocyanates. The thermal stability of these polyurethanes were monitored by thermogravimetry and IR spectroscopy, and compared with other polyurethanes having general pendant azo chromophores.

The poled polyurethane films exhibited large and stable second-order nonlinear optical properties.

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