[article]
| Titre : |
Influence of different photoinitiatiors in the UV-LED curing of polyester acrylated varnishes |
| Type de document : |
texte imprimé |
| Auteurs : |
Ricardo Dossin, Auteur ; Alessandra Lavoratti, Auteur ; Rodrigo Cercena, Auteur ; Alexandre Gonçalves Dal-bó, Auteur ; Matheus Vinicius Gregory Zimmermann, Auteur ; Ademir José Zattera, Auteur |
| Année de publication : |
2023 |
| Article en page(s) : |
p. 393-402 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Analyse mécanique dynamique
Analyse thermique
Caractérisation
Colorimétrie
Diodes électroluminescentes
Enrobage (technologie)
Essais dynamiques
Formulation (Génie chimique)
Morphologie (matériaux)
Photoamorceurs (chimie)
Photoréticulation
Polyesters
Revêtements -- Séchage sous rayonnement ultraviolet
Traction (mécanique)
Vernis
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
The search for environmentally friendly coatings has gained relevance in recent years. To circumvent the use of volatile organic compounds, ultraviolet light curing has attracted considerable attention, especially with the recent advances in light emitting diodes (LEDs), wherein one of the most important components is the photoinitiator. Since UV-LED curing has a narrower wavelength spectrum than regular UV curing, the choice of photoinitiator is crucial. In this study, the influence of six types of photoinitiators in the curing of polyester acrylate varnishes was investigated. The post-curing optical, thermal, mechanical, dynamic mechanical, and morphological properties of these varnishes were examined. All varnishes were completely cured, and the resins cured with LED 1711 and diphenyl (acyl) phosphine oxide exhibited the lowest post-curing photoyellowing. Satisfactory mechanical and dynamic mechanical properties were achieved for all samples. However, due to the thickness of the films, more studies are needed to optimize the surface roughness of the varnishes. |
| Note de contenu : |
- EXPERIMENTAL METHODS AND MATERIALS : Materials - Varnish preparation - Varnish application and curing - Characterization
- RESULTS AND DISCUSSION : Characterization of the photoinitiators - Curing and thermal analysis - Dynamic mechanical analysis - Tensile testing - Colorimetry - Morphology of the varnishes
- Table 1 : Photoinitiators (PIs) and their respective supplier, viscosity, visual aspect, components, and attributed sample name
- Table 2 : Varnish formulation with the respective components and weight percentages (%wt)
- Table 3 : Mass loss events obtained from the first derivative curves of the TGA analysis
- Table 4 : Tensile strength results of the varnish films: tensile strength (MPa), elongation at break (%), and elastic modulus (MPa)
- Table 5 : Colorimetry results of the varnishes |
| DOI : |
https://doi.org/10.1007/s11998-022-0679-x |
| En ligne : |
https://link.springer.com/content/pdf/10.1007/s11998-022-00679-x.pdf?pdf=button |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38850 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 1 (01/2023) . - p. 393-402
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Influence of different photoinitiatiors in the UV-LED curing of polyester acrylated varnishes in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 1 (01/2023)
