| Titre : |
Polyimide–polyester hybrid UV-curable powder coating |
| Type de document : |
texte imprimé |
| Auteurs : |
Hamideh M. Shokouhi Mehr, Auteur ; Theodore J. Hammer, Auteur ; Mark D. Soucek, Auteur |
| Année de publication : |
2021 |
| Article en page(s) : |
p. 1445-1459 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Analyse thermique
Caractérisation
Formulation (Génie chimique)
Matériaux hybrides
Polyesters
Polyimides
Polymères -- Synthèse
Revêtements -- Séchage sous rayonnement ultraviolet
Revêtements organiques
Revêtements poudre
Rhéologie
|
| Résumé : |
A new UV-curable maleimide-terminated polyimide was prepared and characterized using gel-permeation chromatography, infrared, and nuclear magnetic resonance spectroscopy. The polyimide was formulated with a commercially available UV-curable polyester resin via twin-screw extrusion to prepare a hybrid powder coating system. The hybrid powder coatings were cured by exposing the molten formulation to UV light. The films were studied by dynamic mechanical analysis (DMA), thermomechanical analysis, and differential scanning calorimetry. DMA highlighted the viscoelastic behavior of the films and showed that an increase in Tg was obtained with increasing polyimide content, as determined via the α-transition in the tanδ curve. Thermogravimetric analysis showed an improvement in the thermal stability of the polyester with the addition of the polyimide. Deformation resistance of the UV-cured films was investigated by SAOS and LAOS rheological methods to investigate the relative endurance of these coatings when subjected to different strains. The viscoelastic properties of the hybrid system were most improved when 16% weight percent of polyimide was added into the system. |
| Note de contenu : |
- EXPERIMENTAL : Material - Synthesis of maleimide-terminated polyimide (PI) - Instrumentation and characterization - Processing parameters and formulations - Powder aplication and curing - Wide-angle X-ray scattering - Atomic Force Microscopy (AFM)
- RESULTS AND DISCUSSION : POlymer synthesis and characterization - Thermal analysis
- Table 1 : FTIR absorption assignment of UVECOAT, PI, and PI–PE-1 post-UV-cure
- Table 2 : Summary of the UV-curable formulations (by weight %) that were used in this study
- Table 3 to 5 : Summary of thermal properties of UV-curable formulations
- Table 6 : Summary of the viscoelastic properties of the UV-curable formulations
- Table 7 : Summary of the molecular weight and polydispersity data of the UV-cured samples
- Table 8 : Represents the summary of coating properties of PI-PEs with different ratios of polyimide |
| DOI : |
https://doi.org/10.1007/s11998-021-00470-4 |
| En ligne : |
https://link.springer.com/content/pdf/10.1007/s11998-021-00470-4.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36801 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 6 (11/2021) . - p. 1445-1459
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Polyimide–polyester hybrid UV-curable powder coating in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 6 (11/2021)
