Advertisement

Springer Nature is making SARS-CoV-2 and COVID-19 research free. View research | View latest news | Sign up for updates

Crystallization-induced sequential reordering in poly(trimethylene terephthalate)/polycarbonate blends

Abstract

Transesterification between poly(trimethylene terephthalate) (PTT) and bisphenol-A-polycarbonate (PC) is studied by differential scanning calorimetry (DSC) and nuclear magnetic resonance (NMR) spectroscopy. When the blend of PTT/PC is annealed at higher temperatures, the samples do not show any melting peak at an initial stage, indicating the samples completely lose their crystallinity due to the formation of random copolymers. However, when the random copolymer is annealed at temperatures lower than the melting temperature of PTT, a melting peak is observed, indicating that the random copolymers are sequentially reordered. The melting point and the heat of fusion of crystals formed from the crystallization-induced sequential reordering depend upon the annealing temperature and time. The average sequence length determined from NMR is increased as the blocks are regenerated.

This is a preview of subscription content, log in to check access.

References

  1. (1)

    L. H. Wang, Z. Huang, T. Hong, and R. S. Porter,J. Macromol. Sci. Phys.,B29, 155 (1990).

  2. (2)

    K. F. Su and K. H. Wei,J. Appl. Polym. Sci.,56, 79 (1995).

  3. (3)

    J. S. Kollodge and R. S. Porter,Macromolecules,28, 4097 (1995).

  4. (4)

    J. S. Kollodge and R. S. Porter,Macromolecules,28, 4106 (1995).

  5. (5)

    R. S. Porter, J. M. Jonza, M. Kimura, C. R. Desper, and E. R. George,Polym. Eng. Sci.,29, 55 (1989).

  6. (6)

    R. S. Porter and L. H. Wang,Polymer,33, 2019 (1992).

  7. (7)

    R. Lenz, J. I. Jin, and K. A. Feichtinger,Polymer,24, 327 (1983).

  8. (8)

    S. Fakirov, M. Sarkissova, and Z. Denchev,Macromol. Chem. Phys.,197, 2837 (1996).

  9. (9)

    I. M. Ward, M. A. Wilding, and H. Brody,J. Polym. Sci. Polym. Phys.,14, 263 (1976).

  10. (10)

    J. Devaux, R. Godard, and P. Mercier,J. Polym. Sci. Polym. Phys.,20, 1875 (1982).

Download references

Author information

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Bae, W.J., Jo, W.H. & Park, Y.H. Crystallization-induced sequential reordering in poly(trimethylene terephthalate)/polycarbonate blends. Macromol. Res. 10, 145–149 (2002). https://doi.org/10.1007/BF03218264

Download citation

Keywords

  • poly(trimethylene terephthalate)
  • polycarbonate
  • crystallization-induced sequential reordering