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. 2021 Oct 15;16:7035–7050. doi: 10.2147/IJN.S297040

Table 1.

FTIR Assignments (in nm) of PAS and Its Nanocomposites (A and B)

Assignment PAS Nanocomposite-A Nanocomposite-B
ν as (N-H) 3490 Overlapped with O-H stretching at 3352 Overlapped with O-H stretching at 3344
ν s (N-H) 3381
ν(O-H) in the layer/H2O 3694 3352 3344
ν (C=O) in COOH 1609 1609 1609
ν O-H ring stretching 3020, 1283, 1163 1286 1285
ν (C-C) assym and sym: stretching of aromatic ring 1519, 1433 1452 1449
ν aromatic (C-C-C) ring sym bending 525 529 521