Effect of chemical structure on the water sorption of amine-cured epoxy resins

Water diffusion and swelling stresses in highly crosslinked epoxy matrices

“…3a is the crossing of the DGEBA 50 C curve with the DEGBA 80 C curve, with a final equilibrium water absorption at 50 C slightly higher than the 80 C. A similar behaviour is also reported in Ref. [20] for similar DGEBA-DDS systems. As demonstrated by Ref.…”

“…[21], and mentioned by Ref. [20], the lack of correlation between the equilibrium water content and the aging temperature is a likely occurrence with systems with a medium polarity, such as the epoxies of this work.…”

Water transport in an epoxy–phenolic coating

“…Despite some apparently contradictory results, a picture has emerged where resins containing a greater proportion of free volume absorb more water when polarity is controlled [29][30][31][32][33]. However, equilibrium water uptake is primarily determined by the hydrogen bonding capability of the network (polarity) [34][35][36][37][38]. Meanwhile, water in epoxy resins has long been established by FTIR techniques to exist in both a free form (not interacting with the resin), and also in a bound state, hydrogen bonded to polymeric sites [39][40][41][42][43].…”

Silane-incorporated epoxy coatings on aluminum alloy (AA2024). Part 1: Improved corrosion performance

“…Organic coatings are commonly used for protecting metals from corrosion, due to their high chemical resistance and strong adhesion to the metal surface. One main challenge for the organic coatings during service is the uptake and penetration of water and corrosive ions [5][6][7], which may deteriorate the adhesion and corrosion resistance of the painting system [8,9].…”