Abstract

The effect of high temperature on the infrared spectra of fully cured PMDA/ODA polyimide is discussed. Changes in some bands can be explained by Boltzmann effects on the distribution of excited states. Other bands, in particular the 1780-cm⁻¹ band that is often used for cure measurements, change in ways that cannot be related to Boltzmann's equation. These band position and intensity changes are explained as configurational changes occurring during heating. Determination of correction factors for integrated peak areas from spectra taken at elevated temperature are discussed.

Instrumental Effects in Infrared Gas Spectra and Spectroscopic Temperature Measurements*

Harold J. Babrov
J. Opt. Soc. Am. 51(2) 171-174 (1961)

Evaluating polyimides as lightguide materials

Rainer Reuter, Hilmar Franke, and Claudius Feger
Appl. Opt. 27(21) 4565-4571 (1988)

Applicability of Infrared Emission and Absorption Spectra to Determination of Hot Gas Temperature Profiles

Richard H. Tourin and Burton Krakow
Appl. Opt. 4(2) 237-242 (1965)

Dispersion effects on infrared spectra in attenuated total reflection

Rabah Belali, Jean-Marie Vigoureux, and Joseph Morvan
J. Opt. Soc. Am. B 12(12) 2377-2381 (1995)

Effect of Convergence on the Infrared Spectra of Anisotropic Substances

Darwin L. Wood and Shashanka S. Mitra
J. Opt. Soc. Am. 48(8) 537-542 (1958)