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Liquid Crystal Polymers: VI. Liquid Crystalline Polyesters of Substituted Hydroquinones

  • W. Jerome JacksonJr.

Synopsis

The use of monosubstituted hydroquinones enables the preparation of liquid crystalline polyesters with lower melting points than can be obtained with hydroquinone. When the substituent is chloro, methyl, tert-butyl, or 1,1-dimethylhexyl, the polyterephthalate homopolyesters still melt at too high a temperature to be injection-molded or melt spun without thermal degradation, but additional modification with a flexible aliphatic component, a kinked rigid group, or 2,6-naphthalenedicarboxylic acid reduces the melting point further and enables the preparation of melt processable liquid crystalline polyesters. The stability of substituted hydroquinone polyesters in air at 150ºC decreases with various substituents in the order of phenyl, tert-butyl, chloro, methyl. At 300ºC in air, the hydroquinone polyesters containing phenyl or tert-butyl substituents are the most stable. The effects of composition on liquid crystallinity and on the properties of injection-molded plastics and melt spun fibers also are discussed.

Keywords

Softening Point Liquid Crystallinity Terephthalic Acid Liquid Crystal Polymer Isophthalic Acid 
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.

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References

  1. 1.
    (a). W. J. Jackson, Jr., Br. Polym. J., 12, No. 4, 153 (1980).Google Scholar
  2. 1.
    V. V. Korshak, Russ. Chem. Rev., 29, 269 (1960).CrossRefGoogle Scholar
  3. 1.
    W. M. Eareckson, J. Polym. Sci., 40, 399 (1959).CrossRefGoogle Scholar
  4. 2.
    I. Goodman, J. E. McIntyre, and J. W.. Stimpson (to ICI), British Patent 989,552 (1965), U.S. Patent 3,321, 437 (1967).Google Scholar
  5. 3.
    I. Goodman, J. E. McIntyre, and D. H. Aldred (to ICI), British Patent 993,272 (1965), U.S. Patent 3,368, 998 (1967).Google Scholar
  6. 4.
    H. F. Kuhfuss and W. J. Jackson, Jr. (to Eastman Kodak Co.), U.S. Patent 3, 778, 410 (1973).Google Scholar
  7. 5.
    H. F. Kuhfuss and W. J. Jackson, Jr. (to Eastman Kodak Co.), U.S. Patent 3, 804, 805 (1974).Google Scholar
  8. 6.
    W. J. Jackson, Jr., and H. F. Kuhfuss, J. Polym. Sci., Polym. Chem. Ed., 14, 2043 (1976).CrossRefGoogle Scholar
  9. 7.
    F. E. McFarlane, V. A. Nicely, and To Go Davis, “Contemporary Topics in Polymer Science,” Vol. 2, E. M. Pierce and J. R. Schaefgen, Eds., Plenum, New York, 1977, p 109.Google Scholar
  10. 8.
    J. J. Kleinschuster, T. C. Pletcher, and J. R. Schaefgen (to Du Pont), Belg. Patent 828, 935 (1975).Google Scholar
  11. 9.
    J. R. Schaefgen (to Du Pont), U.S. Patent 4,118, 372 (1978).Google Scholar
  12. 10.
    C. R. Payet (to Du Pont), U.S. Patent 4,159, 365 (1979).Google Scholar
  13. 11.
    W. J. Jackson, Jr., and H. F. Kuhfuss (to Eastman Kodak Co.), U.S. Patent 4, 360, 658 (1982).Google Scholar
  14. 12.
    W. J. Jackson, Jr., and H. F. Kuhfuss (to Eastman Kodak Co.), U.S. Patent 4, 238, 600 (1980).Google Scholar
  15. 13.
    R. R. Luise (to Du Pont), U.S. Patent 4,183, 895 (1980).Google Scholar
  16. 14.
    W. J. Jackson, Jr., G. G. Gebeau, and H. F. Kuhfuss (to Eastman Kodak Co.), U.S. Patent 4, 153, 779 (1979).Google Scholar
  17. 15.
    J.-I. Jin, So Antoun, Co Ober, and Ro W. Lenz, Br. Polymo Jo, 12, No. 4, 132 (1980).CrossRefGoogle Scholar
  18. 36.
    S. Antoun, R. W. Lenz, and J.-I. Jin, J. Polym. Sci., Polym. Chem. Ed., 19, 1901 (1981).CrossRefGoogle Scholar
  19. 17.
    J. R. Schaefgen (to Du Pont), U.S. Patent 4,075, 262 (1978).Google Scholar
  20. 18.
    W. J. Jackson, Jr., G. G. Gebeau, and H. F. Kuhfuss (to Eastman Kodak Co.), U.S. Patent 4, 242, 496 (1980).Google Scholar
  21. 19.
    W. J. Jackson, Jr., Macromolecules, in press.Google Scholar
  22. 20.
    W. J. Jackson, Jr., and H. F. Kuhfuss (to Eastman Kodak Co.), U.S. Patent 4, 156, 070 (1979).Google Scholar
  23. 21.
    J. C. Morris and W. J. Jackson, Jr. (to Eastman Kodak Co.), U.S. Patent 4, 146, 702 (1979).Google Scholar
  24. 22.
    F. E. McFarlane and T. G. Davis (to Eastman Kodak Co.), U.S. Patent 4,011, 199 (1977).Google Scholar
  25. 23.
    R. W. Lenz, private communication.Google Scholar
  26. 24.
    W. J. Jackson, Jr., and H. F. Kuhfuss (to Eastman Kodak Co.), U.S. Patent 4, 287, 332 (1981).Google Scholar

Copyright information

© Plenum Press, New York 1984

Authors and Affiliations

  • W. Jerome JacksonJr.
    • 1
  1. 1.Research Laboratories, Eastman Chemicals DivisionEastman Kodak CompanyKingsportUSA

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