Abstract
Small-angle neutron scattering (SANS) data have been obtained for (i) a series of solutions of C m H2m+1(OCH2−CH2)2SO4Na, for m=18, 16, and 14; (ii) an approximately 0.07M solution of C14H29(OCH2−CH2)2SO4Na to which different amounts of NaCl were added; and (iii) a series of solutions of variable concentration of C12H25(OCH2−CH2)SO4Na. The increase of the number of carbon atoms of the hydrocarbon chain produces a noticeable increase of the aggregation number of the micelles, while the salt tolerance decreases with increasing m. All the data can be described in terms of a monodispersed, charged, hard-spheres model interacting via a screened Coulombic potential, except the run at highest salt concentration, for which an ellipsoid model gives better results.
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References
V. H. Schievelbein, U. S. Patent 4,460,481 (1984).
H. Morita, Y. Kawada, T. Ukigai, and J. Yamada, U. S. Patent 4,534,411 (1985).
R. Triolo, E. Caponetti, and V. Graziano,J. Phys. Chem. 89, 5743 (1985).
E. Caponetti and R. Triolo,J. Solution Chem. 14, 815 (1985).
R. Triolo and E. Caponetti,J. Solution Chem. 15, 377 (1986).
R. Triolo and E. Caponetti, inMagnetic Resonance and Scattering in Surfactant Systems, (Plenum, New York, 1986) in press.
G. D. Wignall and F. S. Bates,J. App. Cryst., in press.
L. Van Hove,Phys. Rev. 94, 1228 (1954).
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Caponetti, E., Triolo, R. & Johnson, J.S. Small-angle neutron scattering from micelles of alkylpolyoxyethylene sulfate: Effect of chain length. J Solution Chem 16, 295–306 (1987). https://doi.org/10.1007/BF00646121
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DOI: https://doi.org/10.1007/BF00646121