Research Article
Effect of Phosphoric Acid Concentration on the Optical Properties of Partially Phosphorylated PVA Complexes
Table 1
Optical parameters for pure PVA and PPVA films.
| Sample (mole ratio) | Optical band gap, (eV) | Absorption peak (nm) |
| Pure PVA | 5.45 | 277 | 0.1 | 5.67 | 275 | 0.2 | 5.75 | 273 | 0.3 | 5.77 | 272 | 0.4 | 5.79 | 271 | 0.5 | 5.83 | 270 |
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