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CPP: Chemische Physik und Polymerphysik

CPP 15: POSTER: Polymers and Biomaterials

CPP 15.43: Poster

Dienstag, 9. März 2004, 17:00–19:00, B

Micellization Behaviour of Diblock Copolymers based on 2-(acetoacetoxy)ethyl methacrylate — •Reinhard Sigel, Theodora Krasia, and Helmut Schlaad — Max Planck Institute of Colloids and Interfaces, D-14476 Potsdam-Golm

Micelles of poly(n-butyl methacrylate)-block-poly[2-(acetoacetoxy)ethyl methacrylate] (PBMA-b-PAEMA) block copolymers in cyclohexane were investigated by static and dynamic light scattering. A shape transition from spherical micelles to wormlike chains is induced by shortening the soluble BMA block or swelling the AEMA core with the selective solvent 2,2,2-trifluoroethanol. The discussion within a model introduced by Förster and Antonietti [1] connects the occurence of this shape transition to the high value of the Flory-Huggins interaction parameter χ, which is estimated to be χ≈0.8.

[1] S. Förster, M. Zisenis, E. Wenz, M. Antonietti; J. Chem. Phys. 104, 9956 (1996)