Abstract
Micelles of pentaoxyethylene C12E5, hexaoxyethylene C12E6, hepatoxyethylene dodecyl ethers C12E7, and heptaoxyethylene tetradecyl ether C14E7 in dilute aqueous solutions were characterized by viscometry. The intrinsic viscosity [η] of the micelles whose size are concentration-dependent were able to be determined at finite concentrations by applying an equation derived by combining the Huggins and Fuoss–Mead equations. The results of [η] as a function of the molar mass of the micelle were successfully analyzed by the hydrodynamic theory for wormlike polymers formulated with the touched bead model, indicating that the micelles assume a flexible cylindrical shape. The values of the cross-sectional diameter d have suggested that the surfactant molecules take a randomly coiled form in the micelles.
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Shirai, S., Yoshimura, S. & Einaga, Y. Intrinsic Viscosity of Polyoxyethylene Alkyl Ether CiEj Micelles. Polym J 38, 37–43 (2006). https://doi.org/10.1295/polymj.38.37
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DOI: https://doi.org/10.1295/polymj.38.37