Advertisement

Origin of Crystallinity in Block and Random Terephthalate-Sebacate Copolymers as Studied Using Monte Carlo Methods

  • Tarek M. Madkour

Abstract

Random and block terephthalate-sebacate copolymers are known to have different thermal transitions while maintaining the same chemical structures. A considerable amount of research has been done in order to search for the origin of this behavior. While it is widely believed that sequence distribution in these copolymers is the primary cause, no theory was able to predict the characteristics of the thermal transition of the copolymers. Following up the Windle approach in generating copolymeric chains using Monte Carlo methods, one hundred chains have been simulated in order to allow for a search of crystallinity in these copolymers. According to the amount of crystallinity found in these copolymers at various feed compositions, the melting points of the different samples have been predicted. Other physical properties such as the interfacial free energy, the standard free energy of fusion and Young’s modulus at small extensions were also predicted. The work is also capable of predicting the size of crystals and the minimum sequence length required for crystallization.

Keywords

Block Copolymer Random Copolymer Ethylene Terephthalate Standard Free Energy Feed Composition 
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.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    J. E. Mark, A. Eisenberg, W. W. Graessley, L. Mandelkern and J. L. Koenig. “Physical Properties of Polymers,” American Chemical Society, Washington, D.C. (1984).Google Scholar
  2. 2.
    O. B. Edgar, and E. J. Ellery, Chem. Soc. 2633 (1952).Google Scholar
  3. 3.
    M. Hachiboshi, T. Fukuda, and S. J. Kobayashi, Macromol. Sci. Phys. 3:525 (1969).CrossRefGoogle Scholar
  4. 4.
    J. F. Kenney, Polym. Eng. Sci. 8:216 (1968).CrossRefGoogle Scholar
  5. 5.
    P. J. Flory, Trans. Faraday Soc. 51:848 (1955).CrossRefGoogle Scholar
  6. 6.
    B. Wunderlich, Chem. Phys. 29:1395 (1958).Google Scholar
  7. 7.
    T. M. Madkour, and J. E. Mark, Comput. Polym. Sci. 4:79 (1994).Google Scholar
  8. 8.
    T. M. Madkour, and J. E. Mark, Comput. Polym. Sci. 4:87 (1994).Google Scholar
  9. 9.
    T. M. Madkour, A. Kloczkowski, and J. E. Mark, Comput. Polym. Sci. 4:95 (1994).Google Scholar
  10. 10.
    S. Hanna, and H. Windle, Polymer 29:207 (1988).CrossRefGoogle Scholar
  11. 11.
    S. Hanna, B. L. Hurrell and A. H. Windle, in: “Crystallization of Polymers,” Dosiere, ed., Kluwer Academic Publishers, Dordrecht (1993).Google Scholar
  12. 12.
    J. Brandrup and E. Immergut. “Handbook of Polymer Science,” Wiley, New York (1975).Google Scholar
  13. 13.
    P. J. Flory. “Principles of Polymer Chemistry,” Cornell University Press, Ithaca, New York (1953).Google Scholar
  14. 14.
    B. Wunderlich. “Macromolecular Physics,” Academic Press, New York (1980).Google Scholar
  15. 15.
    L. R. G. Treloar. “The Physics of Rubber Elasticity, Third Edition,” Oxford University Press, Clarendon (1975).Google Scholar
  16. 16.
    J. E. Mark and B. Erman. “Rubberlike Elasticity. A Molecular Primer,” Wiley-Interscience, New York (1988).Google Scholar

Copyright information

© Springer Science+Business Media New York 1995

Authors and Affiliations

  • Tarek M. Madkour
    • 1
  1. 1.Department of ChemistryHelwan UniversityCairoEgypt

Personalised recommendations