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Issue 5, 2010
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Swelling and rheology of thermoresponsive gradient copolymer micelles

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Abstract

Poly(laurylmethacrylate-block-styrene-block-laurylmethacrylate) gradient copolymers (PLMA-PS-PLMA) in a selective solvent for PLMA, self-assemble into spherical colloidal micelles. The structure and the dynamics of the solutions are investigated as a function of temperature and concentration using small angle X-ray scattering (SAXS) and rheology. When the temperature is increased, the micellar cores shrink and the coronas increase due to the gradual solubilization of the domains where S and LMA segments are mixed. The swelling of the micelles is perfectly correlated to the increase of the viscosity. The variations of the low-shear viscosity over a wide range of concentrations and temperatures are rescaled onto a universal curve and compared to those for other soft colloidal systems like star polymers, hairy particles and dendrimer solutions.

Graphical abstract: Swelling and rheology of thermoresponsive gradient copolymer micelles

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Publication details

The article was received on 10 Sep 2009, accepted on 20 Nov 2009 and first published on 05 Jan 2010


Article type: Paper
DOI: 10.1039/B918854A
Citation: Soft Matter, 2010,6, 984-993
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    Swelling and rheology of thermoresponsive gradient copolymer micelles

    N. Merlet-Lacroix, E. Di Cola and M. Cloitre, Soft Matter, 2010, 6, 984
    DOI: 10.1039/B918854A

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