Wet-heat durability of bonded joint of functional acrylic oligomers and microgels toughening epoxy

two modified systems, functional acrylic oligomers/epoxy and microgels/epoxy, were studied to observe shear strength and durability of bonded joint under hot and wet condition. From the wet heat test and wedge test, it could be found that wet hot resistance of PACR1 and PACR2/epoxy systems, in which the intensity retention was 81.7% and 80.0% respectively , and wet-hot resistance of microgel/epoxy system were good. A good joint durability were achieved when PACR2 and microgel were used as toughening agents.