Affiliation:
1. Center for Smart Light-Harvesting Materials, and Department of Polymer Science and Engineering, Hannam University, Daejeon 306-791, Korea
Abstract
We have designed and synthesized novel thermally stable perfluorinated polyimides with pendant perfluorinated aromatic unit for photonic applications. At first, we developed a new synthetic route to a perfluorinated aromatic diamine by protecting-deprotecting as well as by nucleophilic bromine displacement reactions, affording a new diamine with a pendant perfluorinated aromatic unit. Its chemical structure was identified by 1H- , 19F- and 13C-NMR spectroscopies as well as mass spectrometry. Novel fluorinated polyimides were prepared by condensation polymerization of the present fluorinated diamine with various dianhydrides. The resultant polyimides are thermally stable over 400°C. The refractive index and birefringence of the resultant polyimides are 1.5844 ~ 1.5040 and 0.01 ~ 0.03 at 633 nm, respectively.
Publisher
World Scientific Pub Co Pte Lt
Subject
Physics and Astronomy (miscellaneous),Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials