Polymers and Rubber Elasticity: Thermodynamics of Large Dimensional Changes in Amorphous Systems

  • Burak Erman
Part of the Nato ASI Series book series (NSSA, volume 132)

Abstract

Polymeric molecules constitute a large fraction of the living material They may be in the form of a single macromolecule dissolved in a suitable fluid, or may exist as a three dimensional topological network swollen — to equilibrium — with the surrounding fluid. In either case, the polymersolvent system constitutes a semi—open thermodynamic system where the solvent molecules of much smaller size may enter or leave the space pervaded by the polymeric molecules. The size of the polymer-solvent system changes upon transport of the solvent. At equilibrium, the size of the polymer-solvent system is determined by the equality of the activity of the solvent in the polymer-solvent system to that in the surrounding region, which in most cases is the pure solvent. The solvent activity depends predominantly on i) the constitution of the polymeric chains and the network, and ii) the thermodynamic interaction between the solvent molecules and the polymer. Presence of solvent in a polymeric network dilates the configurations of the macromolecules constituting the network. On the other hand, the connectivity of the network chains opposes dilation. The balance between these two opposing effects determines the equilibrium degree of swelling of the network.

Keywords

Permeability Entropy Rubber Turkey Macromolecule 

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References

  1. 1.
    P.J. Flory, “Principles of Polymer Chemistry”, Cornell University Press, Ithaca, New York (1953).Google Scholar
  2. 2.
    P.J. Flory and Y. Tatara, J. Polym. Sci. Polym. Phys. Ed., 13:683 (1975).CrossRefGoogle Scholar
  3. 3.
    P.J. Flory, Disc. Faraday Soc., 49:7 (1970).CrossRefGoogle Scholar
  4. 4.
    B.E. Eichinger and P.J. Flory, Trans. Faraday Soc., 64:2035 (1968).CrossRefGoogle Scholar
  5. 5.
    P.J. Flory, Proc. R. Soc. Rond. A, 351:351 (1976).CrossRefGoogle Scholar
  6. 6.
    B. Erman and P.J. Flory, to appear in Macromolecules, Sept. 1986.Google Scholar
  7. 7.
    F. Harrary, “Graph Theory”, Reading, Mass., U.S.A.: Addison-Wesley (1971).Google Scholar
  8. 8.
    P.J. Flory and B. Erman, Macromolecules, 15:800 (1982).CrossRefGoogle Scholar
  9. 9.
    B. Erman and P.J. Flory, Macromolecules, 15:806 (1982).CrossRefGoogle Scholar
  10. 10.
    T. Tanaka, Phys. Rev. Lett., 40:820(1978).CrossRefGoogle Scholar
  11. 11.
    M. Ilavsky, Polymer, 22:1687 (1981); 15:782 (1982).CrossRefGoogle Scholar

Copyright information

© Plenum Press, New York 1987

Authors and Affiliations

  • Burak Erman
    • 1
  1. 1.School of EngineeringBoğaziçi UniversityBebekTurkey

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