The European Physical Journal E

, Volume 5, Issue 1, pp 5–12

Triblock copolyampholytes from 5-(N,N-dimethylamino)isoprene, styrene, and methacrylic acid: Synthesis and solution properties

  • R. Bieringer
  • V. Abetz
  • A.H.E. Müller

DOI: 10.1007/s101890170081

Cite this article as:
Bieringer, R., Abetz, V. & Müller, A. Eur. Phys. J. E (2001) 5: 5. doi:10.1007/s101890170081

Abstract:

ABC triblock copolymers of the type poly[5-(N,N-dimethylamino)isoprene]-block-polystyrene-block-poly(tert-butyl methacrylate) (AiST) were synthesized and hydrolyzed to yield poly[5-(N,N-dimethylamino)isoprene]-block-polystyrene-block-poly(methacrylic acid) (AiSA) triblock copolyampholytes. Due to a complex solubility behavior the solution properties of these materials had to be investigated in THF/water solvent mixtures. Potentiometric titrations of AiSA triblock copolyampholytes showed two inflection points with the A block being deprotonated prior to the Ai hydrochloride block thus forming a polyzwitterion at the isoelectric point (iep). The aggregation behavior was studied by dynamic light scattering (DLS) and freeze-fracture/transmission electron microscopy (TEM). Large vesicular structures with almost pH-independent radii were observed.

PACS. 61.16.Bg Transmission, reflection and scanning electron microscopy (including EBIC) – 61.25.Hq Macromolecular and polymer solutions; polymer melts; swelling – 81.05.Lg Polymers and plastics; rubber; synthetic and natural fibers; organometallic and organic materials 

Copyright information

© EDP Sciences, Springer-Verlag, Società Italiana di Fisica 2001

Authors and Affiliations

  • R. Bieringer
    • 1
  • V. Abetz
    • 1
  • A.H.E. Müller
    • 1
  1. 1.Makromolekulare Chemie II, Universität Bayreuth, 95440 Bayreuth, GermanyDE
  2. 2.Bayreuther Zentrum für Kolloide und Grenzflächen, 95440 Bayreuth, GermanyDE

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