1. Effect of mechanical treatments on orientation behavior and spectral properties of azoderivative dyes incorporated in poly(vinyl alcohol) films
- Author
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Albu, Raluca Marinica, Stoica, Iuliana, Barzic, Andreea Irina, Postolache, Mihai, Angheluta, Mihai-Daniel, and Dorohoi, Dana Ortansa
- Subjects
Molecules -- Models ,Dyes and dyeing -- Usage ,Polyvinyl alcohol -- Usage ,Engineering and manufacturing industries ,Science and technology - Abstract
Various azoderivative dyes were incorporated in uncolored poly(vinyl alcohol) (PVOH). One type of film was obtained by drying the layer of solution cast on glass plate. The other type was obtained by rubbing the PVOH layer before complete drying. Linear birefringence and dichroism of dyed polymer films were investigated as a function of stretching degree. An increase in the linear birefringence was found with increasing stretching degree for both uncolored and colored films. Dichroism of the PVOH films depends on the dye chemical structure and also on the stretching degree of both non-rubbed and rubbed and dyed PVOH samples. Molecular modeling was used to examine interactions occurring between PVOH and the embedded dye molecule. These stretching degree dependencies were approximated mathematically, which was used to describe the behavior of some components of interference filters. KEYWORDS blends, dyes/pigments, films, molecular modeling, optics, 1 | INTRODUCTION Dye-containing polymers present both theoretical and practical uses in the development of new products with increased performance. [1] Depending on the properties of the incorporated dye molecules [...]
- Published
- 2021
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