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Photoemissive polymer coatings prepared by emulsion polymerization

Authors: Machotová Jana | Tydlitát Jiří

Year: 2023

Type of publication: ostatní - přednáška nebo poster

Page from-to: nestránkováno

Titles:

Language	Name	Abstract	Keywords
eng	Photoemissive polymer coatings prepared by emulsion polymerization	Photoemissive polymers are very attractive materials today. They combine favorable properties of polymers, such as relatively affordable production, processing and mechanical properties, and a luminescent effect. There are plenty of these materials, which are currently most commonly used in the areas of photovoltaics, LEDs, or various sensors. Given that considerable demands are placed on the ecological nature of the final products and the technological processes by which these products are obtained, the emulsion polymerization technique was chosen for the preparation of photoemissive polymers, the product of which is an aqueous polymer dispersion, the so-called latex. As part of this work, film-forming latexes based on styrene/butyl acrylate and methyl methacrylate/butyl acrylate copolymers were synthesized and studied, in the structure of which an emissive compound based on a triphenylamine-pyridine derivative was incorporated. The influences of the concentration of the chromophoric compound (0.005  0.1 wt.% in the monomer batch) on the polyreaction conversion, the colloidal stability of the latexes, and the molecular weight of the copolymers were evaluated. The effectiveness of incorporating an emission derivative was also assessed. It was found that for latexes based on styrene/butyl acrylate copolymer, the conversion and colloidal stability decreased significantly with increasing concentration of the emissive compound, while latexes based on methyl methacrylate/butyl acrylate copolymer were stable at all tested concentrations of the chromophore derivative and also achieved high conversion. At the same time, it was confirmed that the emissive derivative was covalently bound to the copolymer chain, without its presence significantly affecting the molecular weight of the copolymers. At all tested concentrations of the emissive derivative in the copolymer, the latexes provided transparent coatings emitting visible radiation under UVA and UVB irradiation, which off	Photoemissive polymer; emulsion polymerization; safety coating