Alina Deutsch, G. Arjavalingam, et al.
IEEE Transactions on Components, Hybrids, and Manufacturing Technology
Paper
Electronic structure and ultraviolet absorption spectrum of polyimide
Abstract
The ultraviolet absorption spectra for polyimide and several polyimide model compounds have been measured and the spectroscopically parametrized CNDO/S3 model is used to provide a detailed quantitative description of the spectra. Analysis of the optical absorption spectrum yields a value of 30° for the phenylimide torsional angle in these systems. In addition, the ultraviolet absorptions are found to be intramolecular charge transfer transitions. © 1989 American Institute of Physics.
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