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Dendronized Hyperbranched Macromolecules: Soft Matter with a Novel Type of Segmental Distribution
Author(s) -
Lederer Albena,
Burchard Walther,
Hartmann Tobias,
Haataja Johannes S.,
Houbenov Nikolay,
Janke Andreas,
Friedel Peter,
Schweins Ralf,
Lindner Peter
Publication year - 2015
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201504059
Subject(s) - dendrimer , polyester , soft matter , macromolecule , molar mass , materials science , monomer , rheology , fourth generation , dynamic light scattering , core (optical fiber) , chemical physics , polymer chemistry , chemical engineering , nanotechnology , chemistry , composite material , polymer , nanoparticle , third generation , colloid , computer science , telecommunications , biochemistry , engineering
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.