Effect of Phosphoric Acid Concentration on the Optical Properties of Partially Phosphorylated PVA Complexes

Figure 2

Plot of versus photon energy for pure PVA and PPVA films with five mole ratios: (a) pure PVA; (b) 0.1; (c) 0.2; (d) 0.3; (e) 0.4; and (f) 0.5.

(a)

(b)

(c)

(d)

(e)

(f)