Cargando…

Tailored Crosslinking Process and Protective Efficiency of Epoxy Coatings Containing Glycidyl-POSS

Versatile product protective coatings that deliver faster drying times and shorter minimum overcoat intervals that enable curing at faster line speeds and though lower energy consumption are often desired by coating manufacturers. Product protective coatings, based on silsesquioxane-modified diglyci...

Descripción completa

Detalles Bibliográficos
Autores principales: Rodošek, Mirjana, Mihelčič, Mohor, Čolović, Marija, Šest, Ervin, Šobak, Matic, Jerman, Ivan, Surca, Angelja K.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7182962/
https://www.ncbi.nlm.nih.gov/pubmed/32151007
http://dx.doi.org/10.3390/polym12030591
_version_ 1783526339258613760
author Rodošek, Mirjana
Mihelčič, Mohor
Čolović, Marija
Šest, Ervin
Šobak, Matic
Jerman, Ivan
Surca, Angelja K.
author_facet Rodošek, Mirjana
Mihelčič, Mohor
Čolović, Marija
Šest, Ervin
Šobak, Matic
Jerman, Ivan
Surca, Angelja K.
author_sort Rodošek, Mirjana
collection PubMed
description Versatile product protective coatings that deliver faster drying times and shorter minimum overcoat intervals that enable curing at faster line speeds and though lower energy consumption are often desired by coating manufacturers. Product protective coatings, based on silsesquioxane-modified diglycidyl ether of bisphenol-A (DGEBA) epoxy resin, are prepared through a glycidyl ring-opening polymerization using dicyandiamide (DICY) as a curing agent. As silsesquioxane modifier serves the octaglycidyl-polyhedral oligomeric silsesquioxane (GlyPOSS). To decrease the operational temperature of the curing processes, three different accelerators for crosslinking are tested, i.e., N,N-benzyl dimethylamine, 2-methylimidazole, and commercial Curezol 2MZ-A. Differential scanning calorimetry, temperature-dependent FT-IR spectroscopy, and rheology allow differentiation among accelerators’ effectiveness according to their structure. The former only contributed to epoxy ring-opening, while the latter two, besides participate in crosslinking. The surface roughness of the protective coatings on aluminum alloy substrate decreases when the accelerators are applied. The scanning electron microscopy (SEM) confirms that coatings with accelerators are more homogeneous. The protective efficiency is tested with a potentiodynamic polarization technique in 0.5 M NaCl electrolyte. All coatings containing GlyPOSS, either without or with accelerators, reveal superior protective efficiency compared to neat DGEBA/DICY coating.
format Online
Article
Text
id pubmed-7182962
institution National Center for Biotechnology Information
language English
publishDate 2020
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-71829622020-05-01 Tailored Crosslinking Process and Protective Efficiency of Epoxy Coatings Containing Glycidyl-POSS Rodošek, Mirjana Mihelčič, Mohor Čolović, Marija Šest, Ervin Šobak, Matic Jerman, Ivan Surca, Angelja K. Polymers (Basel) Article Versatile product protective coatings that deliver faster drying times and shorter minimum overcoat intervals that enable curing at faster line speeds and though lower energy consumption are often desired by coating manufacturers. Product protective coatings, based on silsesquioxane-modified diglycidyl ether of bisphenol-A (DGEBA) epoxy resin, are prepared through a glycidyl ring-opening polymerization using dicyandiamide (DICY) as a curing agent. As silsesquioxane modifier serves the octaglycidyl-polyhedral oligomeric silsesquioxane (GlyPOSS). To decrease the operational temperature of the curing processes, three different accelerators for crosslinking are tested, i.e., N,N-benzyl dimethylamine, 2-methylimidazole, and commercial Curezol 2MZ-A. Differential scanning calorimetry, temperature-dependent FT-IR spectroscopy, and rheology allow differentiation among accelerators’ effectiveness according to their structure. The former only contributed to epoxy ring-opening, while the latter two, besides participate in crosslinking. The surface roughness of the protective coatings on aluminum alloy substrate decreases when the accelerators are applied. The scanning electron microscopy (SEM) confirms that coatings with accelerators are more homogeneous. The protective efficiency is tested with a potentiodynamic polarization technique in 0.5 M NaCl electrolyte. All coatings containing GlyPOSS, either without or with accelerators, reveal superior protective efficiency compared to neat DGEBA/DICY coating. MDPI 2020-03-05 /pmc/articles/PMC7182962/ /pubmed/32151007 http://dx.doi.org/10.3390/polym12030591 Text en © 2020 by the authors. 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 (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Rodošek, Mirjana
Mihelčič, Mohor
Čolović, Marija
Šest, Ervin
Šobak, Matic
Jerman, Ivan
Surca, Angelja K.
Tailored Crosslinking Process and Protective Efficiency of Epoxy Coatings Containing Glycidyl-POSS
title Tailored Crosslinking Process and Protective Efficiency of Epoxy Coatings Containing Glycidyl-POSS
title_full Tailored Crosslinking Process and Protective Efficiency of Epoxy Coatings Containing Glycidyl-POSS
title_fullStr Tailored Crosslinking Process and Protective Efficiency of Epoxy Coatings Containing Glycidyl-POSS
title_full_unstemmed Tailored Crosslinking Process and Protective Efficiency of Epoxy Coatings Containing Glycidyl-POSS
title_short Tailored Crosslinking Process and Protective Efficiency of Epoxy Coatings Containing Glycidyl-POSS
title_sort tailored crosslinking process and protective efficiency of epoxy coatings containing glycidyl-poss
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7182962/
https://www.ncbi.nlm.nih.gov/pubmed/32151007
http://dx.doi.org/10.3390/polym12030591
work_keys_str_mv AT rodosekmirjana tailoredcrosslinkingprocessandprotectiveefficiencyofepoxycoatingscontainingglycidylposs
AT mihelcicmohor tailoredcrosslinkingprocessandprotectiveefficiencyofepoxycoatingscontainingglycidylposs
AT colovicmarija tailoredcrosslinkingprocessandprotectiveefficiencyofepoxycoatingscontainingglycidylposs
AT sestervin tailoredcrosslinkingprocessandprotectiveefficiencyofepoxycoatingscontainingglycidylposs
AT sobakmatic tailoredcrosslinkingprocessandprotectiveefficiencyofepoxycoatingscontainingglycidylposs
AT jermanivan tailoredcrosslinkingprocessandprotectiveefficiencyofepoxycoatingscontainingglycidylposs
AT surcaangeljak tailoredcrosslinkingprocessandprotectiveefficiencyofepoxycoatingscontainingglycidylposs