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Issue 3, 2012
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Equilibrium exchange kinetics in n-alkyl–PEO polymeric micelles: single exponential relaxation and chain length dependence

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Abstract

In this communication we present first results on the chain exchange kinetics of n-alkyl–PEO polymeric micelles by time-resolved small angle neutron scattering. We found that the rate strongly depends on the alkyl-chain length and that the relaxation function almost perfectly follows the single exponential decay predicted by theory. The key achievement of this study is the experimental verification that core block polydispersity accounts for the almost logarithmic time decay in block copolymer micelles as recently suggested by Choi et al. The results thus directly show that unimer exchange is the main mechanism for molecular exchange in block copolymer micelles.

Graphical abstract: Equilibrium exchange kinetics in n-alkyl–PEO polymeric micelles: single exponential relaxation and chain length dependence

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Publication details

The article was received on 22 Sep 2011, accepted on 16 Nov 2011 and first published on 01 Dec 2011


Article type: Communication
DOI: 10.1039/C1SM06809A
Citation: Soft Matter, 2012,8, 623-626
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    Equilibrium exchange kinetics in n-alkyl–PEO polymeric micelles: single exponential relaxation and chain length dependence

    T. Zinn, L. Willner, R. Lund, V. Pipich and D. Richter, Soft Matter, 2012, 8, 623
    DOI: 10.1039/C1SM06809A

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