| | IR Wavenumber (cm−1) | Assignment |
1H-NMR chemical shift () ppm of copolymer | Nature of protons assigned |
| | 3451.0 b, st | –OH (phenolic) | 10.7 | s, 1H, –OH | | 2924.4 sh, w | –NH– (amino) | 7.9 | s, 1H, tetrasubstituted, Ar–H | | 2855.0 sh, w | –CH2– stretching methylene Bridge | 8.0 | s, 2H, ortho to –CH2 in methylene dianiline moiety | | 1650.0–1660.2 b, m | >C=C< in aromatics | 6.8–6.9 | d, 2H, ortho to >NH in methylene dianiline moiety | | 1498.9 sh, st | Asymm. N=O str, b | 3.5 | s, 1H, CH2–NH–Ar | | 1338.8 sh, m | Symm. N=O str, b | 3.1 | s, 2H, Ar–CH2–Ar in methylene dianiline moiety | | 1286.7 b, st | C–N str. in amine, b | 2.5 | s, 2H, Ar–CH2–NH– | | 1217.2 sh, m | C–O str. in phenol, m | | | | 850.7 sh, w | Tetrasubstituted benzene ring | | | | 965.4 sh, w | | | | | Methylene bridge (–CH2) modes | | | | 1460.0 b, m | Bending | | | | 1345–1350 sh, m | Wagging | | | | 750–770 sh, w | Rock | | |
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