|  | Relative peak area (%) | |||||||
---|---|---|---|---|---|---|---|---|---|
 |  | LA3030 | LA3038 | ||||||
 |  | 16 dpi |  | 28 dpi |  | 16 dpi |  | 28 dpi |  |
Functional group | Peak wavenumber | C | I | C | I | C | I | C | I |
-OH- | 3436 cm-1 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 |
-CH2- | 2921 cm-1 | 53.5 | 53.4 | 54.7 | 54.7 | 55.0 | 57.0 | 55.6 | 60.6 |
-CO- (non conjugated) | 1734 cm-1 | 62.3 | 61.8 | 64.2 | 54.2 | 61.2 | 59.2 | 63.6 | 55.7 |
-CO- (conjugated) | 1650 cm-1 | 70.1 | 85.4 | 69.8 | 107.8 | 75.9 | 95.2 | 80.9 | 102.3 |