New Wholly-Aromatic Thermotropic Polyesters with Controlled Flexibility

Abstract

In this work, we present the synthesis and characterization of a new series of wholly-aromatic copolyesters derived from the condensation of various weight fractions of 4,4’-(o- phenylenedioxy)dibenzoic acid (OPDB) and substituted terephthalic acid (BTA) with 2-phenylhydroquinone (PHQ). The Higashi method, involving tosyl chloride and pyridine as solvent, was employed to yield polymer with significant molecular weight. These polymers are intended to enable accessible clearing transition and to control the balance of stiffness and toughness in melt-spun fibers systematically. We report the synthetic details along with characterization of quiescent phase behavior and morphology.

This is a preview of subscription content, access via your institution.

References

  1. 1.

    P.T. Mather, A. Romo-Uribe, C.D. Han, S.S. Chang, Macromolecules, 30, p.7977 (1997).

    CAS  Article  Google Scholar 

  2. 2.

    In, “ Liquid crystallinity in polymers: principles and fundamental properties,” edited by Alberto Ciferri. New York: VCH Publishers, (1991).

  3. 3.

    H. Han and P.K. Bhowmik, Prog. Polym. Sci., 22, p.1431 (1997).

    CAS  Article  Google Scholar 

  4. 4.

    P.T. Mather, H.R. Sttiber, K.P. Chaffee, T.S. Haddad, A. Romo-Uribe, and J.D. Lichtenhan, Mat. Res. Soc. Symp. Proc., 425, p.137 (1997).

    Article  Google Scholar 

  5. 5.

    D.S. Nagvekar, P.T. Mather, H.G. Jeon, and L.-S. Tan, Manuscript in Preparation (1999).

    Google Scholar 

  6. 6.

    L.-S. Tan; N. Venkatasubramanian, J. Polym. Sci. Part A, Polym. Chem., 34, p.3539 (1996).

    CAS  Article  Google Scholar 

  7. 7.

    F. Higashi in “New Methods for Polymer Synthesis,” ed. W. I. Mijs, Plenum Press, New York, pg.112 (1992).

  8. 8.

    F. Higashi, N. Akiyama, I. Takahashi, and T. Koyama, J. Polym. Sci. A: Polym Chem. Ed., 22, p.1653 (1984).

    CAS  Google Scholar 

  9. 9.

    W.R. Krigbaum, H. Hakemi, and R. Kotek, Macromolecules, 18, p.965 (1985).

    CAS  Article  Google Scholar 

  10. 10.

    M.G. Dobb, D.J.Johnson, B.P. Saville, J. Polym. Sci.: Polym. Phys. Ed., 15, p.2201 (1977).

    CAS  Google Scholar 

  11. 11.

    C. Viney, A.M. Donald, A.H. Windle, J. Mater. Sci., 18, p.1136 (1983).

    CAS  Article  Google Scholar 

  12. 12.

    The orientation parameter, <P2>, is measured by azimuthal scanning of the primary reflection and subsequent numerical analysis following, e.g., W. Haase, Z.X. Fan, and H.J. Müller, J. Chem. Phys. 89, p.3317 (1988).

    CAS  Article  Google Scholar 

Download references

Author information

Affiliations

Authors

Corresponding author

Correspondence to Devdatt S. Nagvekar.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Nagvekar, D.S., Mather, P.T., Jeon, H.G. et al. New Wholly-Aromatic Thermotropic Polyesters with Controlled Flexibility. MRS Online Proceedings Library 559, 165–170 (1999). https://doi.org/10.1557/PROC-559-165

Download citation