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.
GinsburgR. and SuskoJ. R., “Polyimide Cure Determination,” in Polyimides: Synthesis, Characterization and Applications, MittalK. L., Ed. (Plenum Press, New York, 1984), Vol. 1, pp. 237–247.
6.
NumataS.FujisakiK., and KinjoN., “Studies of Thermal Cyclization of Polyamic Acids,” in Polyimides: Synthesis, Characterization and Applications, MittalK. L., Ed. (Plenum Press, New York, 1984), Vol. 1, pp. 259–271.
7.
KotonM. M.KudryavtsevV. V.ZubkovV. A.YakimanskiiA. V.MeleshkoT. K., and BogoradN. N., Polymer Sci. USSR26, 2839 (1984).
8.
LaiusL. A. and TsapovetskyM. I., “Kinetics and Mechanism of Thermal Cyclization of Polyamic Acids,” in Polyimides: Synthesis, Characterization and Applications, MittalK. L., Ed. (Plenum Press, New York, 1984), Vol. 1, pp. 295–309.
9.
KabilovZ. A.MuinovT. M.ShibaivL. A.SazanovYu. N.KorzhavinL. N., and ProkopchukN. R., Thermochimica Acta28, 333 (1979).
10.
KatonJ. E.LoboS. R., and SimpsonJ. C., Appl. Spectrosc.41, 468 (1987).
11.
KatonJ. E.LoboS. R., and SimpsonJ. C., Appl. Spectrosc.41, 807 (1987).
12.
ZerbiG.CastiglioniC., and GussoniM., Proc. SPIE Int. Soc. Opt. Eng. (USA)553, 201 (1985).
13.
VanclefA. and BoucheR., Spectrosc. Lett.12, 371 (1979).