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Volume 18 No 3 (2020)
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Enhancement of Urbach Energy and Dispersion Parameters of Polyvinyl Alcohol with Kaolin Additive
Khansaa Saleem Sharba, Akeel Shakir Alkelaby, Manal Dakhil Sakhil, Khalid Haneen Abass, Nadir Fadhil Habubi, Sami Salman Chiad
Abstract
Polyvinyl alcohol films have been prepared with various additives of Kaolin by casting method at a thickness of 10 μm. The impacts of Kaolin additive on some optical parameters has been studied by recording the transmittance spectra UV-Visible spectrophotometer in the range 200-900 nm after studied the structure from X-ray diffraction and FTIR to determine the crystallites and the activation groups. Urbach energy increased with the increases of Kaolin additive leading to decrease bandgap from 4.08 eV of PVA film to 3.77 eV of 4% Kaolin additives.
Keywords
Polyvinyl Alcohol, Kaolin, XRD, Dispersion Parameters, Urbach Energy.
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