Mechanism of Morphological Transition from Lamellar/Perforated Layer to Gyroid Phases

  • Ahn, Jong-Hyun (Department of Materials Science & Engineering, Pohang University of Science and Technology) ;
  • Zin, Wang-Cheol (Department of Materials Science & Engineering, Pohang University of Science and Technology)
  • Published : 2003.06.01

Abstract

We investigated epitaxial relations of phase transitions between the lamellar (L), hexagonally perforated layers (HPL), and gyroid (G) morphologies in styrene-isoprene diblock copolymer (PSI) and polyisoprene (PI)/PSI blend using rheology and small angle X-ray scattering (SAXS) techniques. In HPLlongrightarrowG transitions, six spot patterns of G phase were observed in two-dimensitional SAXS pattern. On the other hand, in direct L-longrightarrowG transition without appearance of HPL phase, the polydomain patterns of G phase were observed. From present study, it was understood that direct LlongrightarrowG transition of blend may be suppressed by high-energy barrier of transition and mismatches in domain orientation between epitaxially related lattice planes.

Keywords

References

  1. Macromolecules v.13 L. Leibler
  2. Macromol. Res. v.10 M. J. Park;K. Char;H. D. Kim;C. H. Lee;B. S. Seong;Y. S. Han
  3. Macromolecules v.27 D. A. Hajduk;P. E. Harper;S. M. Gruner;C. C. kim;E. L. Thomas;L. . Fetters
  4. Macromolecules v.27 S. Forster;A. K. Khandpur;J. Zhao;F. S. Bates;I. W. Hamley;A. J. Ryan;W. Bras
  5. Macromolecules v.28 A. K. Khandpur;S. Forster;F. S. Bates;J. Zhao;A. J. Ryan;W. Bras;I. W. Hamley
  6. Macromolecules v.33 J. -H. Ahn;W. -C. Zin
  7. Phys. Rev. Lett. v.73 M. F. Shulz;F. S. Bates;K. Almadal;K. Mortensen
  8. Macromolecules v.31 M. E. Vigild;K. Almadal;K. Mortensen;I. W. Hamley;J. P. A. Faiclough;A. J. Ryan
  9. J. Phys. Chem. B v.102 D. A. Hajduk;R. -M. Ho;M. A. Hillmyer;F. S. Bates;K. Almdal
  10. Macromolecules v.30 D. A. Hajduk;H. Takenouchi;M. A. Hillmyer;F. S. Bates
  11. Biochemistry v.31 D. C. Turner;S. M. Gruner
  12. Macromolecules v.29 F. S. Bates;M. W. Matsen
  13. Macromolecules v.35 J. -H. Ahn;W. -C. Zin