| Titre : |
Hybrid organic/inorganic coatings produced using a dual-cure mechanism |
| Type de document : |
texte imprimé |
| Auteurs : |
Jie He, Auteur ; Bret J. Chisholm, Auteur ; Bret A. Mayo, Auteur ; Hanzhen Bao, Auteur ; Jared Risan, Auteur ; David A. Christianson, Auteur ; Crystal L. Rafferty, Auteur |
| Année de publication : |
2012 |
| Article en page(s) : |
p. 423-431 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Anticorrosion
Matériaux hybrides
Polyacrylates
Réticulation (polymérisation)
Revêtements -- Entretien et réparations
Revêtements -- Séchage sous rayonnement ultraviolet
SiliconesLes silicones, ou polysiloxanes, sont des composés inorganiques formés d'une chaine silicium-oxygène (...-Si-O-Si-O-Si-O-...) sur laquelle des groupes se fixent, sur les atomes de silicium. Certains groupes organiques peuvent être utilisés pour relier entre elles plusieurs de ces chaines (...-Si-O-...). Le type le plus courant est le poly(diméthylsiloxane) linéaire ou PDMS. Le second groupe en importance de matériaux en silicone est celui des résines de silicone, formées par des oligosiloxanes ramifiés ou en forme de cage (wiki).
Sol-gel, Procédé
|
| Tags : |
Revêtements hybrides organiques / inorganiques - séchage UV revêtements mécanisme de guérison double Sol-gel |
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
A coating precursor containing both acrylate functionality and trimethoxysilane functionality was produced by reacting bisphenol-A glycerolate diacrylate with 3-isocyanatopropyltimethoxysilane. With this precursor, two different crosslinked networks can be produced. A polyacrylate network can be produced using a radiation-cure mechanism while a polysiloxane network can be produced by hydrolysis and condensation reactions involving the trimethoxysilane groups. The objective of the study was to determine the utility of this dual-cure system for generating rapid-cure coatings for corrosion protection. Coating properties were determined as a function of cure conditions. The results of the study showed that the formation of siloxane crosslinks was significantly hindered by the crosslinked network induced by the UV-curing process. Even though the overall conversion of trimethoxysilane groups to siloxane crosslinks was relatively low, coating barrier properties were significantly enhanced and coating free volume reduced. At ambient conditions, additional crosslinking occurring through siloxane bond formation increased within the first 4 days after UV-curing. Beyond this period, siloxane bond formation remained unchanged as did coating properties. |
| Note de contenu : |
- Materials
- Coating preparation and processing
- Instrumentation |
| DOI : |
10.1007/s11998-011-9389-z |
| En ligne : |
https://link.springer.com/content/pdf/10.1007%2Fs11998-011-9389-z.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15993 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 9, N° 4 (07/2012) . - p. 423-431
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Hybrid organic/inorganic coatings produced using a dual-cure mechanism in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 9, N° 4 (07/2012)
