Park, KH Song, S Lee, YS Lee, CJ Kim, N 2024-01-21T17:41:36Z 2024-01-21T17:41:36Z 2021-09-04 1998-01 0032-3896 https://pubs.kist.re.kr/handle/201004/143430 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 degrees C and an initial decomposition temperature of about 300 degrees 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 degrees C during long period. English SOC POLYMER SCIENCE JAPAN 2ND-ORDER NONLINEARITY AROMATIC POLYIMIDES STABILITY POLYMERS CHROMOPHORES Synthesis and second-order nonlinear optical properties of tricyanovinylated polybenzoxazole Article 10.1295/polymj.30.470 1 POLYMER JOURNAL, v.30, no.6, pp.470 - 473 POLYMER JOURNAL 30 6 470 473 scie scopus 000075440400004 2-s2.0-0031636341 Polymer Science Polymer Science Article 2ND-ORDER NONLINEARITY AROMATIC POLYIMIDES STABILITY POLYMERS CHROMOPHORES polybenzoxazole nonlinear optics tricyanovinyl thermal stability electro-optic coefficient