| Polymer | Band (cm−1) | Band (cm−1) (0.0 min) | Band (cm−1) (120 min) | Type of vibration | Intensity |
| PVBP | 3446 | 3446 | 3441 | (OH), stretching vibration of carboxylic acid | Decreasing |
| 3027 | 3027 | 3032 | (=C−H), stretching vibration of Aromatic | Increasing | |
| 2919 | 2919 | 2924 | (C−H), stretching vibration of benzene | Increasing | |
| 2842 | 2842 | 2852 | (O−H} stanching vibration | Increasing | |
| 1644 | 1644 | 1646 | (C=C} stanching vibration in dines | Increasing | |
| 1480 | 1480 | 1485 | (C=C) stretching of aromatic | Increasing | |
| 1111 | 1111 | 1116 | (C−O} stanching vibration | Decreasing | |
| 825 | 825 | 835 | Conjugated double bond | Increasing | |
| 753 | 753 | 758 |
| Decreasing |