A reevaluation of bicontinuous cubic phases in starblock copolymers
- Princeton Univ., NJ (United States). Dept. of Physics
- Massachusetts Inst. of Technology, Cambridge, MA (United States). Dept. of Materials Science and Engineering
- Exxon Research and Engineering Co., Annandale, NJ (United States)
Recently, a new equilibrium microstructure, a second bicontinuous cubic morphology similar in many respects to the ordered bicontinuous double diamond (OBDD) structure, has been identified in a weakly segregated polystyrene-polyisoprene (SI) diblock copolymer melt. X-ray diffraction indicated that the new cubic phase was more consistent with a microstructure based on the Schoen G or ``gyroid`` minimal surface than with an analogous model of the OBDD morphology based on the Schwarz D minimal surface. This new cubic phase was therefore entitled the ``gyroid*``, with the ``*`` symbol serving to distinguish the block copolymer morphology from the G minimal surface. This paper reviews the studies of the microstructures of these two copolymers and discusses the difficulties encountered.
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- FG02-87ER60522
- OSTI ID:
- 43116
- Journal Information:
- Macromolecules, Journal Name: Macromolecules Journal Issue: 7 Vol. 28; ISSN MAMOBX; ISSN 0024-9297
- Country of Publication:
- United States
- Language:
- English
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