Transition to Lamellar-Catenoid Structure in Block-Copolymer Melts

M. Olvera de la Cruz*, A. M. Mayes, B. W. Swift

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

58 Scopus citations

Abstract

The microphase transition in symmetric and nearly symmetric diblock-copolymer melts is studied expanding the density of the periodic structures in multiple harmonics. We analyze the periodicity in the weak segregation regime minimizing the Landau mean field free energy of the structure. The density distribution inside the unit cell is constructed for various morphologies. A three-dimensional hexagonal structure, identified as a “lamellar-catenoid”, is found to be the equilibrium structure at the transition. It consists of alternating lamellar domains connected by an orthogonal array of hexagonally packed cylinders.

Original languageEnglish (US)
Pages (from-to)944-948
Number of pages5
JournalMacromolecules
Volume25
Issue number2
DOIs
StatePublished - Mar 1 1992

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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