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2016-04-11 - Article/Dans un journal avec peer-review - Anglais - 11 page(s)

Poorteman Marc , Olivier Marie-Georges , Dubois Philippe , Bonnaud Leila , Dumas Ludovic, Escobar Julien, Renaud Alexis, "Thermal curing of para-phenylenediamine benzoxazine for barrier coating applications on 1050 aluminum alloys." in Progress in Organic Coatings, 97, 99-109

  • Edition : Elsevier (Netherlands)
  • Codes CREF : Chimie des surfaces et des interfaces (DI1327), Connaissance des matériaux (DI2111), Corrosion des matériaux (DI2114), Contrôle des matériaux (DI2830)
  • Unités de recherche UMONS : Science des Matériaux (F502)
  • Instituts UMONS : Institut de Recherche en Science et Ingénierie des Matériaux (Matériaux)
  • Centres UMONS : Ingénierie des matériaux (CRIM)
Texte intégral :

Abstract(s) :

(Anglais) Polybenzoxazine coatings have been applied by spin coating of a solution, prepared from a laboratory synthesized phenol, para-phenylenediamine benzoxazine (P-pPDA), on 1050 aluminum alloy. A heat treatment was performed on the coating to polymerize the benzoxazine monomer by a ring opening mechanism attested for by Fourier Transform Infrared spectroscopy (FT-IR) and followed by Differential Scanning Calorimetry (DSC). Dielectric Analysis (DEA) showed curing to proceed at a temperature range up to 230 °C, without thermal decomposition taking place, as has already been reported in the literature for commercial Bisphenol-a benzoxazines (Ba-A). The barrier protection has been evaluated by Electrochemical Impedance Spectroscopy (EIS) for 30 days in a sodium chloride solution (0.1M). The results were fitted with equivalent electrical circuits in order to understand the electrochemical behavior of such a system. The initial barrier properties of both precursor and polymerized coatings appear to be excellent for coatings having a thickness of only 5 μm. Though delamination occurs in the polymerized coating during saline tests after several days of immersion, such kind of coatings have remarkable properties with respect to epoxy coatings as they show a high geometrical stability during curing and a very low water uptake during saline tests

Identifiants :
  • DOI : 10.1016/j.porgcoat.2016.03.026