Spectral-Polarization Properties and Light Resistance of Polyvinyl-Alcohol Films Colored With Disazo Dyes

Fillipovich, L. N.; Ariko, N. G.; Agabekov, V. E.; Malashko, P. M.

doi:10.1007/s10812-005-0123-4

Cited by 6 publications

(9 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The rate of the developing reaction depends slightly on the amount of dye. An analogous dependence of the rate of the photoprocess on the dye concentration was observed in a study of the photostability of polarizing films containing disazo dyes [2], and the results of the kinetic studies made it possible to conclude that the dye was in the aggregated state.…”

supporting

confidence: 61%

“…Earlier we obtained film polarizers based on PVA and disazo dyes from the azobenzeneazonaphthalene class, effective in the range λ = 450-500 nm [1][2][3]. We added Brilliant Yellow (BY), a water-soluble dye with absorption maximum ~400 nm, to these dyes as an additional component improving the polarizing power of the film in the short-wavelength region of the spectrum.…”

mentioning

confidence: 99%

“…The decrease in S for C > 0.3 wt.% suggests most likely an increase in the fraction of aggregated and more poorly oriented BY particles. Earlier it was concluded that such particles were formed in a study of the photostability of films dyed with disazo dyes of the azobenzene-azonaphthalene class [2]. In the opinion of the authors of [6], the reason for the decrease in S as the amount of the dye Direct Blue increases in a PVA film also is enhancement of intermolecular interaction between the dye molecules, leading to a change in their orientational distribution in the polymer.…”

mentioning

confidence: 99%

“…Anisotropic PVA films dyed with a mixture of Brilliant Yellow and the disazo dye M 3 [2] showed high polarizing power (≥93%) over a broad range of the spectrum (400-600 nm).…”

mentioning

confidence: 99%

See 3 more Smart Citations

Optical anisotropy and photostability of polarizing films dyed with Brilliant Yellow

2009

Self Cite

View full text Add to dashboard Cite

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.Keywords: Brilliant Yellow, anisotropic polyvinyl alcohol films, spectral properties, orientational parameters of dye molecules and polymer chains.Introduction. The polarizing power of polymer films containing dichroic dyes is connected with their ability to selectively absorb one of the orthogonally polarized components of radiation incident on the film, for which the electric vector matches the direction of the electronic transition moment in the dye molecule, and to transmit the second component. Most films with dyes used for practical applications polarize light in the visible region of the electromagnetic spectrum, where the main absorption bands are found for molecules with extended chains of conjugated double bonds. Since the highest polarizing power of the film appears in the region of maximum absorption of light by the dye, it is advisable to use mixtures of dyes in order to obtain a material effective over a broad spectral range.Polyvinyl alcohol (PVA) is widely used as the polymer base, because it is relatively simple to make uniaxially oriented films from it and because of their distinctive optical properties, as well as the availability and low cost of the raw material. Earlier we obtained film polarizers based on PVA and disazo dyes from the azobenzeneazonaphthalene class, effective in the range λ = 450-500 nm [1-3]. We added Brilliant Yellow (BY), a water-soluble dye with absorption maximum ~400 nm, to these dyes as an additional component improving the polarizing power of the film in the short-wavelength region of the spectrum.In this work, we have studied the spectral and polarization properties of PVA films dyed with Brilliant Yellow, obtained under conditions that are optimal for making polarizers with disazo dyes [1].Experimental Section. The films were formed from 10% solutions of PVA (Moviol 28-99, Hoechst, Germany, M w = 150,000), containing the dye and gelling and plasticizing additives [1]. Uniaxial stretching was done in a 4% solution of boric acid (H 3 BO 3 ) at T = 45

show abstract

supporting

confidence: 61%

mentioning

confidence: 99%

mentioning

confidence: 99%

“…Anisotropic PVA films dyed with a mixture of Brilliant Yellow and the disazo dye M 3 [2] showed high polarizing power (≥93%) over a broad range of the spectrum (400-600 nm).…”

mentioning

confidence: 99%

See 2 more Smart Citations

Optical anisotropy and photostability of polarizing films dyed with Brilliant Yellow

2009

Self Cite

View full text Add to dashboard Cite

show abstract

“…The methoxy groups had a small effect on the alignment in PVA-based polarizing films and were widely used in direct dyes for PVA-based polarizing films [32][33][34]. The liquid crystalline polymers of the guest-host system are believed to be sensitive to the steric hindrance of the dyes and have very poor receptive capacity as compared to PVA polymers containing innumerable hydrogen bonding groups.…”

Section: A C C E P T E D Accepted Manuscriptmentioning

confidence: 99%

Effect of dye structure on orientational behavior and transition dipole moments in coatable guest–host polarizers

et al. 2015

View full text Add to dashboard Cite

Making polyvinyl alcohol films iodinated at solution state before casting and its application

Shin

Lyoo

Lee

2008

J of Applied Polymer Sci

View full text Add to dashboard Cite

This research focused on the manufacture a polarizing film with PVA iodinated at solution before casting (IBC) film, which was prepared by casting aqueous solutions of 10 wt % poly(vinyl alcohol) (PVA) containing boric acid with 0, 0.1, 0.5, and 1.0 mol/L of I 2 /KI aqueous solution, and I 2 /KI(1:2) with 0, 5, and 10 wt % of PVA. The lights of wavelengths between 450 and 700 nm were polarized in UV analysis. The degree of polarization and transmittance of the IBC polarizing film (10 wt % I 2 /KI and 0.5 mol/L boric acid) are 99.9% and 43.2%, respectively. The resistance of the heat and humidity of IBC polarizing films was higher than that of commercial polarizing films, which were elucidated by changing the transmittance of the films. This can be explained by the fact that the interaction between polyiodine molecules and PVA chains as the state of IBC is higher than that of the commercial state. The effect of boric acid may be strengthened for the resistance of heat and humidity. Crosslinking by boric acid improved thermal properties of the IBC polarizing films, resulting from the increases of degradation temperature in DSC and TG analysis. And the unit cell broadening occurred, which was caused by the intrusion of boric acid into PVA chains in X-ray analysis.

show abstract

Spectral-Polarization Properties and Light Resistance of Polyvinyl-Alcohol Films Colored With Disazo Dyes

Cited by 6 publications

References 7 publications

Optical anisotropy and photostability of polarizing films dyed with Brilliant Yellow

Optical anisotropy and photostability of polarizing films dyed with Brilliant Yellow

Effect of dye structure on orientational behavior and transition dipole moments in coatable guest–host polarizers

Making polyvinyl alcohol films iodinated at solution state before casting and its application

Contact Info

Product

Resources

About