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Worm–like micelles in water solutions of 1, 4 poly(1, 3 butadiene)-polyethilene oxide Diblock copolymer.

The rheological behavior of worm-like micelle solutions of typical surfactants is not followed by this system. The system steadily shear thins as shear rate increases reaching very low viscosity values at large shear rates ; there are not shear thickening peaks. In tixotropic loops, up-shear and down-shear curves can be superimposed ; the micellar solution does not present hysteresis. The viscoelastic spectra do not follow the Maxwell model at low and intermediate frequencies, which is atypical in a worm-like micellar solution. This uncommon behavior was explained as a consequence of the impediment of any micellar rearrangement, due to the extremely high hydrophobicity of the PB block.

wormlike micelles; doblock copolymer; selforganisation

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