Colloid and Polymer Science

, Volume 285, Issue 1, pp 27–37

Langmuir monolayer and Langmuir–Blodgett films of amphiphilic triblock copolymers with water-soluble middle block

  • Chiranjeevi Peetla
  • Karlheinz Graf
  • Jörg Kressler
Original Contribution

DOI: 10.1007/s00396-006-1527-2

Cite this article as:
Peetla, C., Graf, K. & Kressler, J. Colloid Polym Sci (2006) 285: 27. doi:10.1007/s00396-006-1527-2

Abstract

Langmuir monolayers and Langmuir–Blodgett (LB) film morphology of amphiphilic triblock copolymers are studied using surface pressure-area measurements and atomic force microscopy (AFM), respectively. The triblock copolymers are composed of long water-soluble poly(ethylene oxide) (PEO) chains as middle block with very short poly(perfluorohexylethyl methacrylate) (PFMA) end blocks. The surface pressure-area isotherms show phase transitions in the brush regime. This phase transition is due to a rearrangement of PFMA block at the air–water interface. It becomes more significant with increasing PFMA content in the copolymer. LB films transferred at low surface pressures from the air–water interface to hydrophilic silicon substrates show surface micelles in the size range of 50–100 nm. A typical crystalline morphology of the corresponding PEO homopolymer is observed in LB films of copolymers with very short PFMA blocks, transferred in the brush region at high surface pressure. This crystallization is hindered with increasing PFMA content in the copolymer.

Keywords

Langmuir monolayers Langmuir–Blodgett films Surface micelles 

Copyright information

© Springer-Verlag 2006

Authors and Affiliations

  • Chiranjeevi Peetla
    • 1
  • Karlheinz Graf
    • 2
  • Jörg Kressler
    • 1
  1. 1.Department of Chemistry, Institute of Physical ChemistryMartin Luther University Halle-WittenbergHalle (Saale)Germany
  2. 2.Max Planck Institute for Polymer ResearchMainzGermany

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