Table 1 Peak assignment of crosslinked Sulfonated Polyacrylamide (Cross-PAA-SO3H)
| Peak position (cm−1) | Assignment |
|---|---|
| 3100–3500 | N–H stretching of NH2, OH stretching of (–SO3H) |
| 1658 | C=O stretching of CO in AAM and AAMPS |
| 1545 | N–H bending (Secondary amid band of AAMPS) |
| 1042 | Sulfonic acid (–SO3H) group |
| 1175–1216 | Symmetric band of SO2 |
| 1453 | Stretching of the C–N band (amid) |
| 700–800 | N–H bending (primary amide) |