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Interactions between sodium tetradecyl sulfate and a series of homogeneous polyoxyethyleneglycol‐ n‐ dodecyl ethers
Author(s) -
Meguro Kenjiro,
Kanbe Tetsuya,
Esumi Kunio
Publication year - 1983
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02660228
Subject(s) - ethylene oxide , sodium dodecyl sulfate , micelle , chemistry , surface tension , critical micelle concentration , sulfate , sodium , homogeneous , ethylene , analytical chemistry (journal) , inorganic chemistry , chromatography , aqueous solution , organic chemistry , thermodynamics , polymer , catalysis , copolymer , physics
The surface tensions of a mixed system of sodium tetradecyl sulfate (STS) and a series of polyoxyethyleneglycol‐ n ‐dodecyl ethers (nED) were measured at temperatures of 30 and 40 C, respectively. When the STS concentration was fixed, the surface tension curves of the mixed system showed a flat portion in the range of which the mixed micelles would be formed. With a decrease of the added STS concentration, the length of the flat portion in these curves decreased gradually, and finally disappeared in the presence of 0.05 mM STS. Furthermore, when the concentration of STS was fixed at 1.0 mM, which is below the critical micelle concentration (CMC), the flat portion length in the surface tension curves de‐creased with decreasing ethylene oxide chain length in nED and with increasing temperature. The influence of increment of temper‐ature was comparable to that for reducing the length of ethylene oxide chain in nED.