Abstract
The lateral diffusion of individual polymer chain of polyethylene oxide (PEO) at oil-water interfaces was studied using fluorescence correlation spectroscopy (FCS). The diffusion coefficient of PEO was systematically under variable salt concentration of NaCl in the aqueous phase and it was found that the diffusion coefficient of the adsorbed polymer chain was very much determined by the viscosity of the oil phase. This fact indicates an enhanced hydrophobic interaction of the PEO chain with the oil phase.
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