Star-shaped Poly(2-oxazoline)s by Dendrimer Endcapping
Hanneke M. L. Lambermont-Thijs A , Martin W. M. Fijten A , Ulrich S. Schubert A B D and Richard Hoogenboom A C D
+ Author Affiliations
- Author Affiliations
A Laboratory of Macromolecular Chemistry and Nanoscience, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands.
B Laboratory of Organic and Macromolecular Chemistry (IOMC) and Jena Center for Soft Matter (JCSM), Friedrich-Schiller-University Jena, Humboldtstrasse 10, 07743 Jena, Germany.
C Supramolecular Chemistry group, Department of Organic Chemistry, Ghent University, Krijgslaan 281-S4, B-9000 Ghent, Belgium.
D Corresponding authors. Email: ulrich.schubert@uni-jena.de; richard.hoogenboom@ugent.be
Australian Journal of Chemistry 64(8) 1026-1032 https://doi.org/10.1071/CH11128
Submitted: 1 April 2011 Accepted: 5 May 2011 Published: 19 August 2011
Abstract
The synthesis of star-shaped poly(2-ethyl-2-oxazoline) is reported by direct end-capping of the living polymer chains with dendritic multiamines. The end-capping kinetics after addition of a first generation polypropylenimine dendrimer are discussed based on monitoring by size exclusion chromatography, revealing less efficient end-capping with larger poly(2-ethyl-2-oxazoline) chains and increasing dendrimer generation. In addition, it is demonstrated that the solution viscosity and cloud point temperature of the star-shaped polymers are much less affected by chain length compared with their linear analogues.
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