title: Dendronized Hyperbranched Macromolecules: Soft Matter with a Novel Type of Segmental Distribution.
abstract: Dendronization of a hyperbranched polyester with different generation dendrons leads to pseudo-dendritic structures. The hyperbranched core is modified by the divergent coupling of protected monomer units to the functional groups. Compared to dendrimers, the synthetic effort is significantly less, but the properties are very close to those of high-generation dendrimers. The number of functional groups, molar mass, and rheology behavior even in the early generation (G1-G4) pseudo-dendrimers strongly resembles the behavior of dendrimers in higher generations (G5-G8). Comparison of the segmental and internal structure with perfect dendrimers is performed using SANS, dynamic light scattering and viscosity analysis, microscopy and molecular dynamics simulation. The interpretation of the results reveals unique structural characteristics arising from lower segmental density of the core, which turns into a soft nano-sphere with a smooth surface even in the first generation.
authors: Polymer Separation Group, Institute of Macromolecular Chemsitry, Leibniz-Institut für Polymerforschung Dresden e.V. Hohe Strasse 6, 01109 Dresden (Germany) http://www.polymerseparation.de. lederer@ipfdd.de.|Technische Universität Dresden, 01062 Dresden (Germany). lederer@ipfdd.de.
authors: Albena
authors: A
authors: Lederer
authors: Institute of Macromolecular Chemistry, Albert-Ludwigs-University Freiburg, Stefan-Meier-Strasse 31, 79104 Freiburg (Germany).
authors: Walther
authors: W
authors: Burchard
authors: Polymer Separation Group, Institute of Macromolecular Chemsitry, Leibniz-Institut für Polymerforschung Dresden e.V. Hohe Strasse 6, 01109 Dresden (Germany) http://www.polymerseparation.de.|Technische Universität Dresden, 01062 Dresden (Germany).
authors: Tobias
authors: T
authors: Hartmann
authors: Molecular Materials, Department of Applied Physics, Aalto University, 00076 Aalto, Espoo (Finland).
authors: Johannes S
authors: JS
authors: Haataja
authors: Molecular Materials, Department of Applied Physics, Aalto University, 00076 Aalto, Espoo (Finland).
authors: Nikolay
authors: N
authors: Houbenov
authors: Leibniz-Institut für Polymerforschung Dresden e.V. Hohe Strasse 6, 01109 Dresden (Germany).
authors: Andreas
authors: A
authors: Janke
authors: Leibniz-Institut für Polymerforschung Dresden e.V. Hohe Strasse 6, 01109 Dresden (Germany).
authors: Peter
authors: P
authors: Friedel
authors: Institut Laue-Langevin (ILL), 6 Rue Jules Horowitz, 38042 Grenoble (France).
authors: Ralf
authors: R
authors: Schweins
authors: Institut Laue-Langevin (ILL), 6 Rue Jules Horowitz, 38042 Grenoble (France).
authors: Peter
authors: P
authors: Lindner
keywords: branching parameters; dendrimers; draining parameter; hyperbranched; pseudo-dendrimer