Regensburg 2010 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 8: Crystallization and Self Assembly I

CPP 8.6: Vortrag

Montag, 22. März 2010, 12:30–12:45, H48

Structure formation of triphilic block copolymers micelles in water — Karsten Busse, Samuel Kyeremateng, and •Jörg Kressler — Nat.Fak. II, Institut für Chemie, Martin-Luther-Universität Halle-Wittenberg, 06099 Halle (Saale)

The micelle formation in water of a new type of triphilic block copolymers [1] (hydrophilic poly(glycero monomethacrylate) PGMA + hydrophobic poly(propylene oxide) PPO + fluorophilic fluorodecyl F) in different compositions like ABC or CABAC structure was investigated by light and Neutron scattering.[2] The hydrophobicity of the PPO part is temperature and molecular weight dependent. The micellar structure depends on the composition of the block copolymer and temperature, and different behaviors can be observed. Due to the temperature dependence of the solubility of the PPO block in water, a collapse of the PPO should appear during heating within the observed temperature range between 5 and 60 °C. This should lead to a shrinking of the core. Depending on the length of the hydrophilic part, the shell can increase in size, due to better solubility. The aggregation behavior of two pentablock copolymers with different hydrophilic amount have been investigated in more detail by NMR, AFM, and TEM.[3]

References 1. Kyeremateng, S. O.; Amado, E.; Blume, A.; Kressler, J. Macromol. Rapid Commun. 2008, 29, 1140. 2. Kyeremateng, S. O.;Busse, K.; Kressler, J. in preparation 3. Kyeremateng, S. O.; Kressler, J. in preparation