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Journal of Chemical Physics / Volume 117 / Issue 4 / ARTICLES / Polymers, Biopolymers, and Complex Systems

J. Chem. Phys. 117, 1869 (2002); http://dx.doi.org/10.1063/1.1486209 (9 pages)

Gaussian effective interaction between flexible dendrimers of fourth generation: A theoretical and experimental study

C. N. Likos1, S. Rosenfeldt2, N. Dingenouts2, M. Ballauff2, P. Lindner3, N. Werner4, and F. Vögtle4

1Institut für Theoretische Physik II, Heinrich-Heine-Universität Düsseldorf, Universitätsstraße 1, D-40225 Düsseldorf, Germany
2Polymer-Institut, Universität Karlsruhe, Kaiserstraße 12, D-76128 Karlsruhe, Germany
3Institut Laue-Langevin, B.P. 156X, 38042 Grenoble Cedex, France
4Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Str. 1, D-53121 Bonn, Germany

(Received 28 January 2002; accepted 25 April 2002)

We propose a theory for the effective interaction between soft dendritic molecules that is based on the shape of the monomer density profile of the macromolecules at infinite dilutions. By applying Flory-type arguments and making use of the experimentally measured density profiles, we derive a Gaussian effective interaction whose parameters are determined by the size and monomer number of the dendrimers that are derived from small-angle neutron scattering (SANS) measurements. By applying this theory to concentrated dendrimer solutions we calculate theoretical structure factors and compare them with experimental ones, derived from a detailed analysis of SANS-data. We find very good agreement between theory and experiment below the overlap concentration, where drastic shape deformations of the dendrimers are absent. © 2002 American Institute of Physics.

© 2002 American Institute of Physics

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KEYWORDS and PACS

Keywords

neutron diffraction, dendrites, molecule-neutron collisions, liquid structure, macromolecules

PACS

  • 61.25.-f

    Studies of specific liquid structures

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.1486209

PUBLICATION DATA

ISSN

0021-9606 (print)  
1089-7690 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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    References

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