Neutron Spin Echo Study of the Dynamics in BIS Cross-Linked Poly(N-Isopropyl Acrylamide) Microgels: Dependence on the Cross-Linker Concentration

  • T. Hellweg
  • W. Eimer
  • S. Pouget
  • K. Kratz
Part of the Lecture Notes in Physics book series (LNP, volume 601)


Neutron spin echo spectroscopy (NSE) is an excellent tool to access the internal dynamics in gels and microgels. NSE directly provides the ensemble averaged intermediate scattering function 〈ISF〉E and due to the Q-range quasi-ergodic scattering behaviour is recovered. In the present study the cross-linker dependence of the internal dynamics of the gel network inside poly(N-isopropyl acrylamide) microgel particles was investigated by means of neutron spin-echo spectroscopy. The measured intermediate scattering functions are well described by single exponential decays, which is in agreement with the model derived by Tanaka et al. [1]. The computed collective diffusion coefficients of the gel network decrease linearly with the number of cross-links introduced in the network for low cross-linker concentrations. This is in contrast with dynamic light scattering (DLS) results obtained for macroscopic gels based on the same polymer by Shibayama et al.[2].


Dynamic Light Scat Relaxation Rate Dynamic Light Scattering Internal Dynamic Microgel Particle 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    T. Tanaka, L.O. Hocker, G.B. Benedek, J. Chem. Phys. 59, 5151 (1973)CrossRefADSGoogle Scholar
  2. 2.
    M. Shibayama, S. Takata, T. Norisuye, Physica A249, 245 (1998)Google Scholar
  3. 3.
    B. Ewen, D. Richter, Advances in Polymer Science 134, 1 (1997)CrossRefGoogle Scholar
  4. 4.
    J.S. Huang, S.T. Milner, B. Farago, D. Richter, Phys. Rev. Lett. 59, 2600 (1987)CrossRefADSGoogle Scholar
  5. 5.
    B. Farago, M. Monkenbusch, K.D. Goecking, D. Richter, J.S. Huang, Physica B213–214, 712 (1995)Google Scholar
  6. 6.
    Th. Hellweg, D. Langevin, Phys. Rev. E 57, 6825 (1998)CrossRefADSGoogle Scholar
  7. 7.
    Th. Hellweg, A. Brûlet, T. Sottmann, Phys. Chem. Chem. Phys. 2, 5168 (2000)CrossRefGoogle Scholar
  8. 8.
    M. Hirai, R.K. Hirai, H. Iwase, S. Arai, S. Mitsuya, T. Takeda, H. Seto, M. Nagao, J. Physics and Chem. of Solids 60, 1359 (1999)CrossRefADSGoogle Scholar
  9. 9.
    P.N. Pusey, W. van Megen, Physica A157, 705 (1989)ADSGoogle Scholar
  10. 10.
    A.M. Hecht, E. Geissler, J. Physique 39, 631 (1978)CrossRefGoogle Scholar
  11. 11.
    G.D. Patterson, Rubber Chemistry and Technology 62, 498 (1989)Google Scholar
  12. 12.
    J.G.H. Joosten, E.T.F. Gelade, P.N. Pusey, Phys. Rev. A 42, 2161 (1990)CrossRefADSGoogle Scholar
  13. 13.
    J.G.H. Joosten, J.L. McCarthy, P.N. Pusey, Macromolecules 24, 6690 (1991)CrossRefADSGoogle Scholar
  14. 14.
    K. Dusek, Responsive Gels: Volume Transitions I, Advances in Polymer Science, Vol. 109 (Springer Verlag, Berlin, 1993)CrossRefGoogle Scholar
  15. 15.
    R. Pelton, Adv. Colloid Interf. Sci. 85, 1 (2000)CrossRefGoogle Scholar
  16. 16.
    F. Gröhn, M. Antonietti, Macromolecules 33, 5938 (2000)CrossRefADSGoogle Scholar
  17. 17.
    M. Antonietti, J. Hartmann, M. Neese, U. Seifert, Langmuir 16, 7634 (2000)CrossRefGoogle Scholar
  18. 18.
    S. Mallam, A.-M. Hecht, E. Geissler, P. Pruvost, J. Chem. Phys. 91, 6447 (1989)CrossRefADSGoogle Scholar
  19. 19.
    M. Shibayama, T. Tanaka, C.C. Han, J. Chem. Phys. 97, 6829 (1992)CrossRefADSGoogle Scholar
  20. 20.
    M. Shibayama, T. Tanaka, J. Chem. Phys. 102, 9392 (1995)CrossRefADSGoogle Scholar
  21. 21.
    H.M. Crowther, B.R. Saunders, S.J. Mears, T. Cosgrove, B. Vincent, S.M. King, G.-E. Yu, Colloids and Surfaces A: Physicochemical and Engineering Aspects 152, 327 (1999)CrossRefGoogle Scholar
  22. 22.
    Th. Hellweg, C.D. Dewhurst, E. Brückner, K. Kratz, W. Eimer, Colloid & Polymer Sci. 278, 972 (2000)CrossRefGoogle Scholar
  23. 23.
    M. Shibayama, T. Norisuye, S. Nomura, Macromolecules 29, 8746 (1996)CrossRefADSGoogle Scholar
  24. 24.
    M. Takeda, T. Norisuye, M. Shibayama, Macromolecules 33, 2909 (2000)CrossRefADSGoogle Scholar
  25. 25.
    M. Shibayama, Y. Fujikawa, S. Nomura, Macromolecules 29, 6535 (1996)CrossRefADSGoogle Scholar
  26. 26.
    C. Wu and S. Zhou, Macromolecules 29, 1574 (1996)CrossRefADSGoogle Scholar
  27. 27.
    K. Kratz, Th. Hellweg, W. Eimer, Ber. Bunsenges. Phys. Chem. 102, 1603 (1998)Google Scholar
  28. 28.
    R.H. Pelton, P. Chibante, Colloids and Surfaces 20, 247 (1986)CrossRefGoogle Scholar
  29. 29.
    K. Kratz, W. Eimer, Ber. Bunsenges. Phys. Chem. 102, 848 (1998)Google Scholar
  30. 30.
    W. Brown, Dynamic Light Scattering (Clarendon Press, Oxford, 1993)Google Scholar
  31. 31.
    P.R. Bevington, Data Reduction and Error Analysis for the Physical Sciences (McGraw-Hill Book Company, New York, 1969)Google Scholar
  32. 32.
    K. Kratz, Th. Hellweg, W. Eimer, Polymer 42, 6631 (2001)CrossRefGoogle Scholar
  33. 33.
    T. Tanaka, D. Fillmore, S.-T. Sun, I. Nishio, G. Swislow, A. Shah, Phys. Rev. Lett. 45, 1636 (1980)CrossRefADSGoogle Scholar
  34. 34.
    E. Sato Matsuo, T. Tanaka, J. Chem. Phys. 89, 1695 (1988)CrossRefADSGoogle Scholar
  35. 35.
    M. Shibayama, T. Tanaka, Volume Phase Transition and Related Phenomena of Polymer Gels, in Responsive Gels: Volume Transitions I, Advances in Polymer Science, Vol. 109, ed. by K. Dusek (Springer Verlag, Berlin, 1993) p. 1Google Scholar
  36. 36.
    H.M. Crowther, B. Vincent, Colloid Polym. Sci. 276, 46 (1998)CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2002

Authors and Affiliations

  • T. Hellweg
    • 1
  • W. Eimer
    • 2
  • S. Pouget
    • 3
  • K. Kratz
    • 4
  1. 1.Iwan-N.-Stranski Institut für Physikalische und Theoretische ChemieTU BerlinBerlinGermany
  2. 2.Fakultät für ChemieUniversität BielefeldBielefeldGermany
  3. 3.Institut Laue-LangevinGrenoble Cedex 9France
  4. 4.mnemoscience GmbHUbach-PalenbergGermany

Personalised recommendations