Table 2.
FTIR spectra assignments for geranium essential oil and geranium oil-based polymer.
| Assignment | Group Frequency, cm−1 | |
|---|---|---|
| Precursor | Polymer | |
| Stretching (OH) | 3367 | 3436 |
| Asymmetric stretching, methyl (–CH2) | 2962 | 2961 |
| Symmetric stretching, methylene (–CH3) | 2926 | 2933 |
| Asymmetric Stretching methyl (–CH3) | 2872 | 2875 |
| Stretching aldehyde (C=O) | 2728 | - |
| Stretching (C=O), aldehyde | 1730 | 1708 |
| Stretching (C=O) carbonyl | 1713 | - |
| Alkenyl (C=C) | 1671 | 1625 |
| Asymmetric bend methyl (C–H) | 1452 | 1453 |
| Symmetric bend methyl (C–H) | 1377 | 1376 |
| In-plane bending (O–H) | 1267 | Merged in broad band |
| Skeletal (C=C) | 1174 | |
| Stretching, alcohol (C–O) | 1058 and 1008 | |