Premium
Optical and colorimetric studies of thorium nitrate‐doped poly(vinyl alcohol) films
Author(s) -
Mahmoud Khaled H.,
Atef Karam
Publication year - 2014
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.22832
Subject(s) - vinyl alcohol , refractive index , materials science , dielectric , absorption edge , casting , doping , absorption spectroscopy , hydrate , thorium , absorption (acoustics) , analytical chemistry (journal) , dispersion (optics) , magnesium nitrate , composite material , magnesium , optics , optoelectronics , uranium , band gap , organic chemistry , chemistry , metallurgy , physics , polymer
In this study, poly(vinyl alcohol) (PVA) films doped with thorium nitrate hydrate [Th(NO 3 ) 4 ] have been prepared using casting technique. The optical absorption spectra were recorded at room temperature in the wavelength range 200–800 nm. From the absorption edge studies, the values of the Urbach energy ( E u ) have been evaluated. These energy values vary slightly with composition, indicating that the model based on electronic transitions between localized states is not preferable. Optical parameters such as refractive index and complex dielectric constant have been determined. The dispersion of the refractive index is discussed in terms of the single‐oscillator Wemple‐DiDomenico model. Color properties of the prepared samples were discussed in the framework of CIE L * u * v * color space. POLYM. COMPOS., 35:1786–1791, 2014. © 2013 Society of Plastics Engineers