Abstract
We have developed the second-order nonlinear optically (NLO) active polybenzoxazole as a new thermally stable NLO polymeric system. This polybenzoxazole was synthesized by direct polycondensation of diacid monomer containing N-phenyl pendant with 2,2-bis(3-amino-4-hydroxyphenyl)-1,1,1,3,3,3-hexafluoropropane using phosphorus pentoxide/methanesulfonic acid as a condensing agent and solvent, followed by a post-substitution of tricyanovinyl group. The resultant polybenzoxazole had a glass transition temperature of about 180°C and an initial decomposition temperature of about 300°C. Electro-optic coefficient of this polybenzoxazole film poled at 1.5 MV cm−1 was 34 pm V−1 (at 633 nm), and its NLO activity was quite stable at 100°C during long period.
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Park, K., Song, S., Lee, Y. et al. Synthesis and Second-Order Nonlinear Optical Properties of Tricyanovinylated Polybenzoxazole. Polym J 30, 470–473 (1998). https://doi.org/10.1295/polymj.30.470
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DOI: https://doi.org/10.1295/polymj.30.470
