Fatty acid esters of polyethylene glycols are biodegradable non-ionic surfactants with application in many industrial segments such as oil and gas, pharmaceutical, cosmetics, and food. Esters of polyethylene glycols based on natural fatty acids such as stearic acid and palmitic acid, were synthesized and characterized, and their Langmuir films were obtained. The viscoelastic properties of these hydrophobically modified polymers at the air/water interface have been investigated. Thus it was also possible to evaluate the Langmuir isotherm (Pi-A) and mechanical properties of the monolayers by calculating the compression modulus (Cs-1). The surface dilatational elasticity and dynamic surface tension of the adsorbed films were analyzed by the pendant drop method with a goniometer apparatus. The oscillatory dynamic storage and loss modules of the bulk of the aqueous surfactant solution were studied in a shear rheometer. The dynamic surface tension studies show that the kinetics of the surfactant adsorption at the air-water interface is reasonably fast, reaching the meso-equilibrium region in approximately 1 to 2 min. It was demonstrated an elastic behavior of these hydrophobic modified polymers in two and three dimensions (interface and bulk). Consequently, it was achieved a good capacity for them to act as oil herding agents in presence or absence of electrolytes in the aqueous subphase.