Influence of different photoinitiatiors in the UV-LED curing of polyester acrylated varnishes / Ricardo Dossin in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 1 (01/2023)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 1 (01/2023) . - p. 393-402 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 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
23928	-	Périodique	Bibliothèque principale	Documentaires	Disponible

---

1 (1 - 1 / 1)