Table 3.
FTIR absorbance peaks assignments of PET.
| Wavenumber (cm−1) | Assignment |
|---|---|
| 2960, 2919, 2849 | CH2 asymmetric and symmetric stretching |
| 1712 | C=O stretching ester |
| 1579, 1505 | C=C stretching aromatic ring |
| 1471, 1453 | CH2 bending |
| 1408 | C–C stretching aromatic ring |
| 1385 (sh) | CH2 deformation |
| 1371 (sh), 1339 | CH2 wagging |
| 1240 | CO–O stretching ester |
| 1175 (sh) | C–H bending in plane aromatic ring |
| 1117 (sh) | Skeletal vibration aromatic ring |
| 1095, 1044 (sh) | O–CH2 stretching |
| 1017 | C–H bending in plane aromatic ring |
| 970 | C–O stretching ester |
| 896 | CH2 rocking |
| 872, 846 | C–H wagging/bending aromatic ring |
| 791 | CO–O bending out of plane ester |
| 721 | COO wagging out of plane + C–H wagging |
| aromatic ring + CH2 Rocking |