Effect of mechanical treatments on orientation behavior and spectral properties of azoderivative dyes incorporated in poly(vinyl alcohol) films. Issue 10 (5th August 2021)

• Record Type: Journal Article
• Authors: Albu, Raluca Marinica; Stoica, Iuliana; Barzic, Andreea Irina; Postolache, Mihai; Angheluta, Mihai‐Daniel; Dorohoi, Dana Ortansa
• Is Part Of: Polymer engineering & science. Volume 61:Issue 10(2021)
• Page Start: 2453
• Page End: 2465
• Publication Date: 2021-08-05
• Subjects: blends -- dyes/pigments -- films -- molecular modeling -- optics; Polymer engineering -- Periodicals; Polymers -- Periodicals; 668.9
• DOI: 10.1002/pen.25771
• Languages: English
• ISSNs: 0032-3888

Abstract

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. Abstract :