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FT-IR spectra of extruded Cloisite–Eudragit RS nanocomposites. (A) 10% Cloisite Na–90% Eudragit RS nanocomposite, individual components, and their physical mixture; (B): (a) 5% Cloisite Na–95% Eudragit RS physical mixture; (b) Cloisite Na nanocomposite at 5% clay loading; (c) Cloisite Na nanocomposite at 10% clay loading; (d) Cloisite Na nanocomposite at 15% clay loading.
