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Dynamic light scattering of CTAB:NaSal threadlike micelles in the semidilute regime. II. effect of surfactant concentration

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Abstract

Dynamic light scattering measurements are made on networks formed by elongated threadlike micelles of cetyltrimethylammonium bromide (CTAB) in aqueous sodium salicylate (NaSal) solutions at 25°C. The surfactant concentrationC D of the samples is varied from 0.006 to 0.3 M and the ratio of the salt concentrationC s toC D is fixed at unity. The time correlation functionA q (t) of light intensity scattered from the solutions exhibits transition from the unimodal to the bimodal distribution of the decay rate Γ at aroundC D=0.05 M. The dependence of the first cumulant Γe on the scattering vectorq for the samples withC D≦0.03 M is described by the dynamic scaling law. The cooperative diffusion coefficientD c is obtained from extrapolation of Γe/q2 for the samples withC D≦0.03 M and of Γf/q2 forC D≧0.05 M where Γf is the first cumulant from the fast mode. TheD c is found in proportion toC D 0.45, being in agreement with the theoretical prediction for a rigid rod in the semidilute regime by the scaling law. The decay rate Γs characteristic of the slow mode is independent ofq, and Γ −1s roughly agrees with the mechanical relaxation time τ estimated from a fit of the dynamic viscoelastic data of the same samples by a Maxwell type of model with the single relaxation time τ.

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References

  1. Shikata T, Sakaiguchi Y, Uragami H, Tamura A, Hirata H (1987) J Colloid Interface Sci 119:291

    Google Scholar 

  2. Clausen TM, Vinson PK, Minter JR, Davis HT, Talman Y, Miller WG (1992) J Phys Chem 96:474

    Google Scholar 

  3. Shikata T, Hirata H, Kotaka T (1987) Langmuir 3:1081

    Google Scholar 

  4. Shikata T, Hirata H, Kotaka T (1988) Langmuir 4:354

    Google Scholar 

  5. Yamamura T, Kusaka T, Takatori E, Inoue T, Nemoto N, Osaki K, Shikata T, Kotaka T (1991) Nihon Reoroji Gakkaishi 19:45 (in Japanese)

    Google Scholar 

  6. Kern F, Zana R, Candau SJ (1991) Langmuir 7:1344

    Google Scholar 

  7. Hashimoto K, Imae T, Nakazawa K (1992) Colloid Polym Sci 270:249

    Google Scholar 

  8. Nemoto N, Kishine M, Inoue T, Osaki K (1990) Macromolecules 23:659

    Google Scholar 

  9. Nemoto N, Kishine M, Inoue T, Osaki K (1991) Macromolecules 24:1648

    Google Scholar 

  10. Nemoto N (1990) In Collyer AA, Utracki LA (eds) Polymer Rheology and Processing, Elsvier: London pp 3

    Google Scholar 

  11. Rodge TP, Rotstein NS, Prager S (1990) Adv Chem Phys 79:1

    Google Scholar 

  12. Nemoto N, Yamamura T, Osaki K, Shikata T (1991) Langmuir 7:2607

    Google Scholar 

  13. Doi M, Edwards SF (1986) The Theory of Polymer Dynamics, Oxford University Press: Oxford

    Google Scholar 

  14. Makhloufi R, Hirsch E, Candau SJ (1989) J Phys Chem 93:8095

    Google Scholar 

  15. Imae T (1990) J Phys Chem 94:5953

    Google Scholar 

  16. Ng Sc, Gan LM, Chew CH (1992) Colloid Polym Sci 270:64

    Google Scholar 

  17. Candau SJ, Hirsch E, Zana R (1985) J Colloid Interface Sci 105:521

    Google Scholar 

  18. Candau SJ, Hirsch E, Zana R, Adam M (1988) J Colloid Interface Sci 122:430

    Google Scholar 

  19. Nemoto N, Kuwahara M (1993) Langmuir 9:419

    Google Scholar 

  20. Appell J, Porte G (1990) Europhys Lett 12:185

    Google Scholar 

  21. Brown W, Johansson K, Almagren M (1989) J Phys Chem 93:5888

    Google Scholar 

  22. Kawasaki K (1971) In Green MS (eds) Critical Phenomena, Academic Press: New York pp 342

    Google Scholar 

  23. In preparation

  24. De Gennes PG (1976) Scaling Concepts in Polymer Physics, Cornell University Press: New York

    Google Scholar 

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Koike, A., Yamamura, T. & Nemoto, N. Dynamic light scattering of CTAB:NaSal threadlike micelles in the semidilute regime. II. effect of surfactant concentration. Colloid Polym Sci 272, 955–961 (1994). https://doi.org/10.1007/BF00658893

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