The degradation of pyromellitic acid diester (PMDE) was studied by transmission Fourier transform IR spectroscopy (FT-IR). Reaction temperatures were varied from room temperature to 280°C, and the effect of temperature upon the observed vibrational modes of PMDE was monitored and analyzed. The formation of both a cyclic and a noncyclic anhydride was observed.
EdwardsW. M. and RobinsonI. M., U.S. Patent 2,710,853 (1955).
2.
GibbsH. H., “Processing Studies on K Polymer Composite Materials Part I—Prepregs Based on K-II Polyimide,” in Advancing Technology in Materials and Processes (SAMPE, Covino, California, 1985), pp. 1585–1593.
3.
SerafiniT. T.DelvigsP., and AlstonW. B., “PMR Polyimides Review and Update,” in Proceedings of the National SAMPE Symposium and Exposition, Azusa, California (1982) (SAMPE, Covino, California, 1982), pp. 320–335.
4.
ClairT. L. St. and JewellR. A., “LARC-160; A New 5500F Polyimide Laminating Resin”82 (1976).
