1999•Macromolecular Chemistry and PhysicsRequires access

Synthesis and nonlinear optical properties of high glass transition polyimides

Kurt Van den Broeck, Thierry Verbiest, Marcel Van Beylen, Andre P. Persoons, Celest Samyn

Abstract

Nonlinear optical (NLO) polymers with glass transition temperatures (Tg) as high as 275°C were prepared by covalent bonding of a chromophore to the backbone of hydroxyl polyimides via a Mitsunobu reaction. NLO side-chain polyimides with different polymer backbones and different chromophores were prepared and characterized by second-harmonic generation. Poled films of the polymers have an excellent nonlinear optical response that is stable at elevated temperatures.

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Key concepts: Glass transition, Chromophore, Polymer, Nonlinear optical, Mitsunobu reaction, Polymer chemistry, Second-harmonic generation, Side chain