Phase behavior of vesicle-forming block copolymers in aqueous solutions

Jörg Braun, Nico Bruns, Thomas Pfohl, Wolfgang Meier

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

The binary phase diagram of amphiphilic poly(ethylene oxide)-block- poly(γ-methyl-ε-caprolactone) block copolymers in water is examined for four polymers having the same hydrophilic block length but different hydrophobic block lengths across the whole concentration range. The bulk polymers show no ordered morphology. With increasing water concentration the polymers undergo transitions from lamellar phases to packed vesicles and subsequently all polymers self-assemble into vesicles in dilute aqueous solutions. Additionally, the largest polymer forms an inverse hexagonal phase, and the smallest polymer self-aggregates into rod-like micelles and showed a hexagonal phase.(Figure Presented)

Original languageEnglish
Pages (from-to)1245-1254
Number of pages10
JournalMacromolecular Chemistry and Physics
Volume212
Issue number12
DOIs
Publication statusPublished - 15 Jun 2011

Keywords

  • amphiphiles
  • block copolymers
  • phase diagrams
  • self-assembly
  • vesicles

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