Bulletin of the Chemical Society of Japan
Online ISSN : 1348-0634
Print ISSN : 0009-2673
ISSN-L : 0009-2673
The Polymer-like Property of a Non-ionic Detergent Having a Long Polyoxyethylene Chain
Fumikatsu Tokiwa
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1963 Volume 36 Issue 2 Pages 222-226


The solubilization and viscosity of polyoxyethylene dodecyl ether (PODE) solutions were studied as a function of the polyoxyethylene chain-length (p). The solubilization is in accordance with the isotherm S=Kcn, where S is the extent of solubilization, c, the concentration of detergent, and n and K, constants. The value of n increases with the p value and is slightly greater than unity for PODE of p>27. The K′-value calculated from Huggins’ equation, which is dependent on the p value, decreases at first with the p value and then somewhat increases in spite of the increasingly hydrophilic nature. The effective volume, Φ⁄c, of PODE, which is nearly independent of c except for the case of PODE in which p=7.6, increases regularly as the p value becomes larger. On the basis of these results, the polymer-like property of PODE of a considerably large p value and the interaction among aggregates of PODE were discussed in connection with ultracentrifugal data reported previously.

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