Understanding of water uptake mechanisms in an epoxy joint characterized by pore-type defects

Andreea Tintatu (1) , C. Badulescu (1, 2) , Pierre Bidaud (1, 2) , Philippe Le Grognec (1, 2) , Jérôme Adrien (3) , E Maire (3) , Hervé Bindi (4) , Corentin Coguenanff (4)

1 IRDL - Institut de Recherche Dupuy de Lôme
2 ENSTA Bretagne - École Nationale Supérieure de Techniques Avancées Bretagne
3 MATEIS - Matériaux, ingénierie et science [Villeurbanne]
4 Thales DMS France, SAS

Understanding of water uptake mechanisms in an epoxy joint characterized by pore-type defects This work aims to characterize the water uptake mechanisms of a two-component epoxy adhesive joint immersed in deionized water. The pore-type defects in the bulk adhesive after the cure cycle are highlighted and characterized using X-ray µ-tomography. Two population patterns of defects are generated and analyzed, for two different thicknesses. The waterfront is not detectable by µ-tomography for this adhesive because the densities of the water and the adhesive remain relatively close to each other. Instead, the volume variation and kinetics of pore water filling have been accurately identified. This analysis was completed by optical observations and gravimetric measurements.

Keywords: structural bonding; water aging; X-ray µ-tomography; pores

Domains: Materials

Andreea Tintatu, C. Badulescu, Pierre Bidaud, Philippe Le Grognec, Jérôme Adrien, et al.. Understanding of water uptake mechanisms in an epoxy joint characterized by pore-type defects. The Journal of Adhesion, 2024, 100 (1), ⟨10.1080/00218464.2023.2187293⟩. ⟨hal-04027291⟩