High T-g second-order nonlinear optical poly(urethane-imide)s prepared from disperse Red 19, pyromellitic dianhydride, and tolylene diisocyanate

摘要

A 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 (231-272degreesC) 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. (C) 2002 Wiley Periodicals, Inc. J Appl Polym Sci 85:944-949,2002. [References: 23]