A main chain copolymer having nonlinear optical properties

摘要

The wholly aromatic polyester copolymer represented by the general formula (I) provided in the present invention exhibits excellent nonlinear optical properties.;(In the above general formula (I), R_OneA halogen group element, OH, or OR (R is an alkyl group having 1 to 5 carbon atoms, R₂Is-O-(CH₂)_One-O-(1 is an integer from 1 to 20),-S-(CH₂)_m-S-(m is an integer from 1 to 20),-O-(CH₂n is an integer from 1 to 5 and Y is CH₃), or (p is an integer from 1 to 6). R₃NO₂And CN, Etc., and R is an alkyl group having 1 to 6 carbon atoms.)