Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Possible FTIR spectra bonds in developed composite membranes [49].
| possible spectra bonds | band frequency (cm−1) |
|---|---|
| C=C aromatic | 1575.18 |
| C=O ketone | 1730.08 |
| benzene/ aromatic rings | 1484.00 |
| sulphone oxide | 1020.55 |
| C-O-C ether | 1139.65 |
| −CH2 bending | 2928.55 |
| −O-H | 3349.99 |
| −N-CH3 | 2928.55 |
