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The Daoud and Cotton blob model and the interaction of star-shaped polymers

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Abstract.

Since it was first proposed in 1982, the Daoud and Cotton (DC) model for star-shaped polymers was intensively used also for self-assembled copolymers and small colloids grafted with long polymers. We try to clarify the position of the DC model and focus on the star partition function which plays a central role in self-assembly and gives access to the star-star interaction. While the predicted star-star interaction agrees with scattering data by Likos et al. (Phys. Rev. Lett. 80, 4450 (1998)), an extensive simulation by Hsu et al. (Macromolecules, 37, 4658 (2004)) does not recover the prediction for the partition function. We try to reconcile this seemingly conflicting results. We discuss star-star interactions, star free energy in \( \theta\) -solvents, mixing of A/B branches in copolymer stars, within or beyond the Daoud and Cotton blob model.

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Authors and Affiliations

  1. Institut Charles Sadron CNRS, Université de Strasbourg, Rue du Loess, 67034, Strasbourg Cedex 2, France

    Albert Johner

  2. Department of Physics, Sejong University, 05006, Seoul, South Korea

    Nam-Kyung Lee

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  1. Albert Johner
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  2. Nam-Kyung Lee
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Correspondence to Albert Johner.

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Johner, A., Lee, NK. The Daoud and Cotton blob model and the interaction of star-shaped polymers. Eur. Phys. J. E 41, 88 (2018). https://doi.org/10.1140/epje/i2018-11698-3

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