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The major absorptions of PE-T observed in the IR region, and their assignments.
| Band (cm−1) | Assignment | Intensity |
|---|---|---|
| 2910 | CH2 asymmetric stretching | Strong |
| 2845 | CH2 asymmetric stretching | Strong |
| 1708 | C=O stretching | Weak |
| 1470 | Bending deformation | Strong |
| 1375 | CH3 symmetric deformation | Weak |
| 1099-599 | C-C stretching vibrations | Weak |
| 718 | C-C stretching vibrations | Strong |
