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Towards Understanding the Chemical Structure Modification of EVA Copolymer upon MAPLE Processing of Thin Films

A series of coatings from poly(ethylene-co-vinyl acetate) (EVA) were obtained using the matrix-assisted pulsed laser evaporation (MAPLE) technique. By changing the process parameters, i.e., laser fluence and EVA co-polymer concentration in the target, coatings with various morphologies and topograph...

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Autores principales: Niemczyk, Agata, Brajnicov, Simona, Satulu, Veronica, Baranowska, Jolanta, Mitu, Bogdana, Dinescu, Maria
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8583955/
https://www.ncbi.nlm.nih.gov/pubmed/34769117
http://dx.doi.org/10.3390/ijms222111686
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author Niemczyk, Agata
Brajnicov, Simona
Satulu, Veronica
Baranowska, Jolanta
Mitu, Bogdana
Dinescu, Maria
author_facet Niemczyk, Agata
Brajnicov, Simona
Satulu, Veronica
Baranowska, Jolanta
Mitu, Bogdana
Dinescu, Maria
author_sort Niemczyk, Agata
collection PubMed
description A series of coatings from poly(ethylene-co-vinyl acetate) (EVA) were obtained using the matrix-assisted pulsed laser evaporation (MAPLE) technique. By changing the process parameters, i.e., laser fluence and EVA co-polymer concentration in the target, coatings with various morphologies and topographies were produced. The evaluation of the film structure was based on an analysis of optical and atomic force microscopy and profilometry measurements. A detailed chemical structure investigation, conducted based on Fourier transform infrared (FTIR) and X-ray photoelectron spectroscopy (XPS) spectra, revealed that although the general structure was preserved, some alterations of ethylene (Et) and vinyl acetate (VAc) blocks took place. The most noticeable change was in the ester group that was transformed into ketone and carboxyl groups; nevertheless, some changes in the aliphatic main chain were also present. The chemical structure changes in EVA coatings took place regardless of the process parameters used. The use of chloroform as a solvent to dissolve the EVA copolymer was indicated as a possible reason of the changes as well as the tendency of EVA macromolecules to form clusters. Nevertheless, due to low level of structure alteration, it has been shown that the MAPLE technique can be successfully used to obtain coatings from polymers with more complex structures, which are soluble in a limited number of solvents.
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spelling pubmed-85839552021-11-12 Towards Understanding the Chemical Structure Modification of EVA Copolymer upon MAPLE Processing of Thin Films Niemczyk, Agata Brajnicov, Simona Satulu, Veronica Baranowska, Jolanta Mitu, Bogdana Dinescu, Maria Int J Mol Sci Article A series of coatings from poly(ethylene-co-vinyl acetate) (EVA) were obtained using the matrix-assisted pulsed laser evaporation (MAPLE) technique. By changing the process parameters, i.e., laser fluence and EVA co-polymer concentration in the target, coatings with various morphologies and topographies were produced. The evaluation of the film structure was based on an analysis of optical and atomic force microscopy and profilometry measurements. A detailed chemical structure investigation, conducted based on Fourier transform infrared (FTIR) and X-ray photoelectron spectroscopy (XPS) spectra, revealed that although the general structure was preserved, some alterations of ethylene (Et) and vinyl acetate (VAc) blocks took place. The most noticeable change was in the ester group that was transformed into ketone and carboxyl groups; nevertheless, some changes in the aliphatic main chain were also present. The chemical structure changes in EVA coatings took place regardless of the process parameters used. The use of chloroform as a solvent to dissolve the EVA copolymer was indicated as a possible reason of the changes as well as the tendency of EVA macromolecules to form clusters. Nevertheless, due to low level of structure alteration, it has been shown that the MAPLE technique can be successfully used to obtain coatings from polymers with more complex structures, which are soluble in a limited number of solvents. MDPI 2021-10-28 /pmc/articles/PMC8583955/ /pubmed/34769117 http://dx.doi.org/10.3390/ijms222111686 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Niemczyk, Agata
Brajnicov, Simona
Satulu, Veronica
Baranowska, Jolanta
Mitu, Bogdana
Dinescu, Maria
Towards Understanding the Chemical Structure Modification of EVA Copolymer upon MAPLE Processing of Thin Films
title Towards Understanding the Chemical Structure Modification of EVA Copolymer upon MAPLE Processing of Thin Films
title_full Towards Understanding the Chemical Structure Modification of EVA Copolymer upon MAPLE Processing of Thin Films
title_fullStr Towards Understanding the Chemical Structure Modification of EVA Copolymer upon MAPLE Processing of Thin Films
title_full_unstemmed Towards Understanding the Chemical Structure Modification of EVA Copolymer upon MAPLE Processing of Thin Films
title_short Towards Understanding the Chemical Structure Modification of EVA Copolymer upon MAPLE Processing of Thin Films
title_sort towards understanding the chemical structure modification of eva copolymer upon maple processing of thin films
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8583955/
https://www.ncbi.nlm.nih.gov/pubmed/34769117
http://dx.doi.org/10.3390/ijms222111686
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