The molecular weight dependence of intrinsic viscosity of rod-like micelles of dodecyldimethylammonium chloride |
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Authors: | D Staszewska M Bohdanecký |
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Institution: | (1) Institute of Macromolecular Chemistry, Czechoslovak Academy of Sciences, Prague, Czechoslovakia;(2) Present address: Institute of Chemistry, N. Copernicus University, 87100 Toru , Poland |
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Abstract: | It is shown that the non-linear logarithmic dependence of the intrinsic viscosity on the molecular weight for rod-like micelles of dodecyldimethylammonium chloride (as reported by Ozeki and Ikeda 1]) can be interpreted in terms of the Yamakawa-Fujii theory of worm-like chains. Characteristic parameters of the micelles are estimated: persistence length (a=14 nm), linear mass density (M
L=4800 nm–1), diameter (d=3 nm), molecular pitch (b=0.052), and the number of surfactant chains in a layer of rod-like micellen=12. The results are compared with those derived from light-scattering measurements. |
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Keywords: | Micelles dodecyldimethylammoniumchloride intrinsicviscosity worm-like cylindermodel |
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