High Tg second‐ order nonlinear optical poly(urethane–imide)s prepared from disperse Red 19, pyromellitic dianhydride, and tolylene diisocyanate

Abstract

Listen

Translate article

AbstractA series of poly(urethane–imide)s with high glass transition temperatures were easily prepared from a commercial nonlinear optical (NLO) chromophore (Disperse Red 19), pyromellitic dianhydride (PMDA), and 2,4‐tolylene diisocyanate (TDI). The resulting polymers possessed good solubility and high glass transition temperatures (231–272°C) and thermal decomposition temperatures. They exhibited excellent film‐forming properties and good‐quality films were easily obtained by spin coating. These polymers also possessed a high coefficient of optical nonlinearity with good temporal stability of the dipole orientation. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 85: 944–949, 2002