Interfacial rheology and conformations of triblock copolymers adsorbed onto the water-oil interface

► Conformational changes were observed by dilatational rheology measurements. ► When the limiting elasticity is plotted against the surface pressure a unique curve is obtained. ► A 2D “stretched chain” conformation at low surface pressure values is inferred. ► Ellipsometric measurements can be explained if PPO is partially in both phases. ► Four surface pressure regions with different surface conformations have been proposed.