[article]
| Titre : |
Preparation and characterization of a novel ultraviolet/thermal dual-curing thiol-ene/polyurethane acrylate coating |
| Type de document : |
texte imprimé |
| Auteurs : |
Dijun Huang, Auteur ; Yongxia Ren, Auteur ; Ruoning Yang, Auteur ; Zhiguo He, Auteur ; Youwei Yao, Auteur |
| Année de publication : |
2021 |
| Article en page(s) : |
p. 1109-1116 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Caractérisation
Copolymère uréthane acrylate
Dureté (matériaux)
Formulation (Génie chimique)
Photoréticulation
Réaction thiol-ène
Temps de séchage
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
A novel ultraviolet (UV)/thermal dual-curing thiol-ene/polyurethane acrylate (PUA) coating of PUA oligomer, tripropylene glycol diacrylate, 2,4,6-trimethylbenzoyldiphenyl phosphine oxide, and trimethylolpropane tris (3-mercaptopropionate) was prepared. The coating had a rapid surface drying rate with UV radiation (400 W, 50 W/cm2). For example, the surface of the novel thiol-ene/PUA coating dried within 3 s. The hardness, gel content, and initial decomposition temperature at 5 wt% weight loss of the UV/thermal dual-cured sample after 10 min of UV irradiation, followed by heating at 150°C for 20 min, were 37 D, 90.3%, and 302.2°C, respectively, which were higher than the 30 D, 87.7% and 284.9°C of the UV curing control after 10 min of UV irradiation. The curing time of the 1-mm-thick coating was 4.5 min in indoor sunlight (2.3 ± 0.3 mW/cm2) with a gel content of 83.8%. This coating could be applied in the rapid prototyping field with UV or sunlight exposure. Thermal treatment after UV curing could increase the crosslinking degree and influence the sample performance. |
| Note de contenu : |
- EXPERIMENTAL : Materials - Preparation of thiol-ene/polyurethane acrylate coatings - Preparation of cured samples - Characterization
- RESULTS AND DISCUSSION : FTIR characterization - Surface drying time with UV irradiation and curing time in sunlight - Gel fraction - Hardness - Thermal stability - Dynamic mechanical thermal performance
- Table 1 : Detailed formulations of coatings 1/2
- Table 2 : Surface drying time of coatings 1/2 with UV irradiation
- Table 3 : Actual curing time of coatings 1/2 in indoor sunlight
- Table 4 : Gel content of cured samples of thiol-ene/PUA coating 1
- Table 5 : Hardness of cured samples
- Table 6 : Thermal properties of different samples under Ar
- Table 7 : DMTA properties and crosslink density of thiol-ene/PUA-cured samples |
| DOI : |
https://doi.org/10.1007/s11998-021-00464-2 |
| En ligne : |
https://link.springer.com/content/pdf/10.1007/s11998-021-00464-2.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36217 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 4 (07/2021) . - p. 1109-1116
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Preparation and characterization of a novel ultraviolet/thermal dual-curing thiol-ene/polyurethane acrylate coating in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 4 (07/2021)
