The near-infrared spectra of polymers
Article first published online: 9 MAR 2003
Copyright © 1977 John Wiley & Sons, Inc.
Journal of Applied Polymer Science
Volume 21, Issue 2, pages 449–454, February 1977
How to Cite
Crandall, E. W. and Jagtap, A. N. (1977), The near-infrared spectra of polymers. J. Appl. Polym. Sci., 21: 449–454. doi: 10.1002/app.1977.070210211
- Issue published online: 9 MAR 2003
- Article first published online: 9 MAR 2003
- Manuscript Revised: 6 FEB 1976
- Manuscript Received: 15 OCT 1975
A series of step reaction polymers have been prepared and studied as melt films or in solution in the overtone region and the combination region of the near-IR. Systems containing aryl rings show bands in the 2.13- to 2.16-μm region which are not observed in those systems not having aryl rings. Polyester, polyamide, and urea-formaldehyde polymers show carbonyl, hydroxyl, and NH overtones. Polyurethanes show only the intense band of NH, in the 2.0- to 2.1-μm region. Ureaformaldehyde and polyamides show this same band. Relative band intensities were compared to the first overtone of CH which appears at 1.67–1.72 μm. In this way, polymers can be compared in a quantitative manner, both with respect to reaction conditions and effect of heat curing.