TY - JOUR
T1 - Effect of hydrophobic chain on CMC in ethoxylated surfactants
AU - Garti, N.
AU - Aserin, A.
PY - 1986/1/1
Y1 - 1986/1/1
N2 - Ethoxylated oleyl alcohol or esters and its selected derivatives were found to behave abnormally in aqueous solutions. It has been demonstrated that when plotting ℓn CMC versus ethylene oxide (E0) units of the unsaturated compounds, negative slopes are obtained, while positive slopes are expected for the corresponding saturated surfactants. Preparation of dihydroxy-, dichloro- and dibromostearyl ethers or esters of ethoxylated surfactants and selected polyglycerol esters confirmed these anomalies. It has been shown also that no common intercept could be expected for such compounds at zero EO units. An explanation based on steric hindrance of the surfactant on micelle packing is proposed.
AB - Ethoxylated oleyl alcohol or esters and its selected derivatives were found to behave abnormally in aqueous solutions. It has been demonstrated that when plotting ℓn CMC versus ethylene oxide (E0) units of the unsaturated compounds, negative slopes are obtained, while positive slopes are expected for the corresponding saturated surfactants. Preparation of dihydroxy-, dichloro- and dibromostearyl ethers or esters of ethoxylated surfactants and selected polyglycerol esters confirmed these anomalies. It has been shown also that no common intercept could be expected for such compounds at zero EO units. An explanation based on steric hindrance of the surfactant on micelle packing is proposed.
UR - http://www.scopus.com/inward/record.url?scp=0022440514&partnerID=8YFLogxK
U2 - 10.1080/01932698608943450
DO - 10.1080/01932698608943450
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AN - SCOPUS:0022440514
SN - 0193-2691
VL - 7
SP - 81
EP - 93
JO - Journal of Dispersion Science and Technology
JF - Journal of Dispersion Science and Technology
IS - 1
ER -