Dexamethasone-Loaded Chitosan Beads Coated with a pH-Dependent Interpolymer Complex for Colon-Specific Drug Delivery

Figure 3

FTIR spectra of PAA, PVP, the physical mixture of PAA and PVP, and the PAA-PVP complexes: (a) PVP-29 and (b) PVP-360.

(a)

(b)