FT-IR spectroscopy
FT-IR spectra of the PVA, CS and their
blends are shown in Figure 6 for two spectral
regions and in Table 2 the main spectral bands
and their assignments are given. The infrared
spectrum of PVA shows an absorption peak at
3328 cm−1, which refers to the intermolecular
hydrogen bonding and –OH stretch vibration.23
The vibrational band observed at 2930 cm-1 is
associated with the C-H stretching from alkyl
groups.