| Wave no. (cm−1) | Peak Assignment (PAM) | Wave no. (cm−1) | Peak Assignment (PEO) | 70/30 (wt%) | 50/50 (wt%) | 30/70 (wt%) |
| 857 | C-C symmetric stretching | 852 | C-C symmetric stretching | 855 | 858 | 852 |
| 956 | C-C asymmetric stretching | 966 | -CH2 rocking | 974 | 974 | 956 |
| 1107 | C-O-C stretching | 1106 | C-O-C stretching | 1119 | 1107 | 1095 |
| 1447 | C-N stretching | 1454 | -CH2 scissoring | 1469 | 1457 | 1469 |
| 1607 | N-H bending | 1610 | Bound H2O in PEO matrix as solvent | 1620 | 1609 | weak |
| 1651 | C=O stretching | 1655 | 1678 | 1654 | weak | |
| 2938 | C-H asymmetric stretching | 2881 | C-H asymmetric stretching | 2950 | 2893 | 2875 |
| 3212 | N-H symmetric stretching | 3177 | -OH stretching | 3229 | 3195 | weak |
| 3315 | N-H asymmetric stretching | 3332 | -OH stretching | 3371 | 3354 | weak |