Optical anisotropy and photostability of polarizing films dyed with Brilliant Yellow

Autor:	V. E. Agabekov, L. N. Filippovich, N. G. Ariko
Rok vydání:	2009
Předmět:	chemistry.chemical_classification Optical anisotropy Materials science Spectral properties Analytical chemistry ALIZARIN RED Polymer Condensed Matter Physics Polyvinyl alcohol chemistry.chemical_compound chemistry Polymer chemistry Molecule Spectroscopy Visible spectrum
Zdroj:	Journal of Applied Spectroscopy. 76:440-446
ISSN:	1573-8647 0021-9037
DOI:	10.1007/s10812-009-9182-2
Popis:	We obtained polyvinyl alcohol films dyed with Brilliant Yellow (BY) and have determined their spectral and polarizing characteristics in the short-wavelength region of the visible spectrum (400–430 nm). We have shown that BY imparts a polarizing power of ≥99% to the film. We measured the orientational parameters characterizing the degree of ordering of the polymer chains and the dye molecules for different BY content in the film. An increase in BY concentration above 0.3 wt.% is accompanied by a decrease in its orientational parameter, which is connected with aggregation of dye molecules and a change in the distribution of the molecular axes relative to the film orientation axis.
Databáze:	OpenAIRE
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