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The near‐infrared spectra of polymers
Author(s) -
Crandall Elbert W.,
Jagtap Ashvin N.
Publication year - 1977
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1977.070210211
Subject(s) - overtone , polymer , polyamide , materials science , curing (chemistry) , infrared spectroscopy , polymer chemistry , polyester , spectral line , infrared , formaldehyde , aryl , chemistry , organic chemistry , composite material , physics , optics , alkyl , astronomy
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.