Thermoreversible Gelation of Crystallisable Polymers and Its Relevance for Applications

  • A. Keller
Part of the Polymer Science and Technology book series

Abstract

By definition macromolecular gels are networks of macromolecules imbibed with a liquid, which is a potential solvent, with chain continuity throughout the whole macroscopic sample. In most traditionally studied gels the junctions are chemical cross-links, and hence permanent. In the gels we shall be concerned with here the junctions are physical associations, and in particular they correspond to crystals, which comprise only a comparatively small portion of the chains. These crystals, like all polymer crystals, form under appropriate supercoolings when solutions of polymers are cooled. On heating, the crystals dissolve and thus the network falls apart, the gelation — dissolution on cooling and heating being repeatable, hence the term “thermoreversible gels”.

Keywords

Polyethylene Rubber Polysaccharide Hexagonal Polystyrene 

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References

  1. 1.
    G. Rehage, Prog. Colloid Polymer Sci., 57:7 (1975).CrossRefGoogle Scholar
  2. 2.
    M. Girolamo, A. Keller, K. Miyasaka, and N. Overbergh, J. Polymer Sci., Physics Ed., 15:211 (1977).ADSCrossRefGoogle Scholar
  3. 3.
    Faraday Discussion No. 68 (1979).Google Scholar
  4. 4.
    H. Berghmans, N. Overbergh, and F. Gavearts, J. Polymer Sci., Physics Ed., 17:1251 (1979).ADSCrossRefGoogle Scholar
  5. 5.
    P. Hawkins, C.G. Cannon, A.G. Coombes, and A. Keller, unpublished observations.Google Scholar
  6. 6.
    S.J. Guerrero, A. Keller, P.L. Soni, and P.H. Geil, J. Polymer Sci., Physics Ed., 18:1533 (1980).ADSCrossRefGoogle Scholar
  7. 7.
    S.J. Guerrero, A. Keller, P.L. Soni, and P.H. Geil, presented at International Conference on PVC, Cleveland (1980), to appear in J. Macromol. Sci. B 20:161 (1981).CrossRefGoogle Scholar
  8. 8.
    P.J. Lemstra, O. Acs, and A. Keller, unpublished works.Google Scholar
  9. 9.
    J.S. Shapiro and A. Keller, to be published.Google Scholar
  10. 10.
    A.G. Coombes, Ph.D. Thesis, Bristol (1979).Google Scholar
  11. 11.
    C.G. Cannon, unpublished communication.Google Scholar
  12. 12.
    S. Fulton and A. Keller, to be published.Google Scholar
  13. 13.
    R. Benson, J. Maxfield, D.E. Axelson, and Mandelkern, L., J. Polymer Sci., Physics Ed., 19:1583 (1978).ADSCrossRefGoogle Scholar
  14. 14.
    A. Takahashi, Polymer J., 4:379 (1973).CrossRefGoogle Scholar
  15. 15.
    E.D.T. Atkins, I.A. Nieduszynski, W. Mackie, K.D. Parker, and E.E. Smolko, Biopolymers, 12:1865 (1973).CrossRefGoogle Scholar
  16. 16.
    R.S. Straff and D.R. Uhlmann, J. Polymer Sci., Physics Ed., 14:35 (1976).Google Scholar
  17. 17.
    P.J. Lemstra, A. Keller, and M. Cudby, J. Polymer Sci., Physics Ed., 16:1507 (1978).ADSCrossRefGoogle Scholar
  18. 18.
    S.J. Guerrero and A. Keller, paper presented at International Conference on PVC, Cleveland (1980), to appear in J. Macromol. Sci. B 20:167 (1981).CrossRefGoogle Scholar
  19. 19.
    J.A. Juijn, J.H. Gisolf, and W.A. de Jong, Kolloid Z.u.Z. Polymere, 251:456 (1973).CrossRefGoogle Scholar
  20. 20.
    S.J. Guerrero, Ph.D. Thesis, Bristol (1980).Google Scholar
  21. 21.
    T. Alfrey, N. Wiederhorn, R. Stein, and A. Tobolsky, Ind. and Eng. Chem., 41:701 (1949).CrossRefGoogle Scholar
  22. 22.
    E.D.T. Atkins, D.H. Isaac, A. Keller, and K. Miyasaka, J. Polymer Sci., Physics Ed., 15:211 (1977).ADSCrossRefGoogle Scholar
  23. 23.
    D.Y. Yoon, P.R. Sundararajan, and P. Flory, Macromolecules, 8:776 (1975).ADSCrossRefGoogle Scholar
  24. 24.
    L. Beck and P.C. Hägele, Colloid Polymer Sci., 254:288 (1976).Google Scholar
  25. 25.
    E.D.T. Atkins, D.H. Isaac, and A. Keller, J. Polymer Sci., Physics Ed., 18:71 (1980).ADSCrossRefGoogle Scholar
  26. 26.
    P.R. Sundararajan, Macromolecules, 12:575 (1979).ADSCrossRefGoogle Scholar
  27. 27.
    P. Corradini, G. Guerra, V. Petracone, and B. Pirozzi, Europ. Polymer J., 16:1089 (1980).CrossRefGoogle Scholar
  28. 28.
    E.D.T. Atkins, A. Keller, P.J. Lemstra, and J.S. Shapiro, Polymer, 22:1161 (1981).CrossRefGoogle Scholar
  29. 29.
    C. Reiss and H. Benoit, J. Polymer Sci., C16:3079 (1968).Google Scholar
  30. 30.
    A.M. North, A. Richard, H. Petrick, and Poh Beng Teik, Polymer, 21:769 (1980).CrossRefGoogle Scholar
  31. 31.
    M.J. Miles, K. Tanaka, and A. Keller, to be published.Google Scholar
  32. 32.
    A. Zwijnenburg and A.J. Pennings, Colloid and Polymer Sci., 259:868 (1978).Google Scholar
  33. 33.
    P.J. Barham, M.J. Hill, and A. Keller, Colloid and Polymer Sci., 258:899 (1980).CrossRefGoogle Scholar
  34. 34.
    A. Keller and P.J. Barham, Plastics and Rubber International, 6:19 (1981).Google Scholar
  35. 35.
    P. Smith and P.J. Lemstra, J. Material Sci., 15:505 (1980).ADSCrossRefGoogle Scholar
  36. 36.
    P. Smith, P.J. Lemstra, B. Kalb, and A.J. Pennings, Polymer Bull., 1:733 (1979).CrossRefGoogle Scholar
  37. 37.
    B. Kalb and A.J. Pennings, Polymer, 21:3 (1980).CrossRefGoogle Scholar
  38. 38.
    P. Smith and P.J. Lemstra, and H.C. Booig, J. Polymer Sci., Physics Ed., 19:877 (1981).ADSCrossRefGoogle Scholar
  39. 39.
    A.J. Pennings, Polymer Symposia, 59:55 (1977).CrossRefGoogle Scholar
  40. 40.
    A. Keller and M.J. Machin, J. Macromol. Sci., Bl:41 (1967).CrossRefGoogle Scholar
  41. 41.
    A. Keller and M.R. Mackley, Pure and Appl. Chem., 39:195 (1974).CrossRefGoogle Scholar
  42. 42.
    E.H. Andrews, Proc. Roy. Soc, A277:562 (1964).ADSGoogle Scholar
  43. 43.
    A. Posthuma de Boer and A.J. Pennings, Faraday Discussion, 68:345 (1979).CrossRefGoogle Scholar
  44. 44.
    K.A. Narh, P.J. Barham, and A. Keller, Macromolecules, 15: 464 (1982).ADSCrossRefGoogle Scholar
  45. 45.
    S. Wellinghoff, J. Shaw, and E. Baer, Macromolecules, 12:932 (1979).ADSCrossRefGoogle Scholar

Copyright information

© Plenum Press, New York 1983

Authors and Affiliations

  • A. Keller
    • 1
  1. 1.H. H. Wills Physics LaboratoryUniversity of BristolBristolUK

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