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Pearl Necklace Architecture : New Threaded Star-Shaped Copolymers

Title data

Plamper, Felix A. ; Reinicke, Stefan ; Elomaa, Matti ; Schmalz, Holger ; Tenhu, Heikki:
Pearl Necklace Architecture : New Threaded Star-Shaped Copolymers.
In: Macromolecules. Vol. 43 (9 March 2010) Issue 5 . - pp. 2190-2203.
ISSN 0024-9297
DOI: https://doi.org/10.1021/ma902568d

Official URL: Volltext

Project information

Project financing: Deutscher Akademischer Austauschdienst
Academy of Finland, Grant Number 127329

Abstract in another language

The synthesis of star-shaped polymers, which are threaded regularly along a common backbone, is described. Thus, two different approaches for preparation of so-called pearl necklace polymers (synonyms: multigraft copolymers, barbwire or centipedes polymers, multiple dumbbells or star-oligomers) are presented. Poly(ethylene oxide) (PEO) was used as a thread and poly(dimethylaminoethyl methacrylate) (PDMAEMA) stars were used as pearls. In the first approach, a polycondensation reaction of PEO macromonomers with partly protected dipentaerythritol leads First to a multiblock PEO. Afterward, the protected hydroxy groups of dipentaerythritol, which is situated at the junction points of the blocks, call be released for the anchoring of PDMAEMA chains. In the second approach, anionic polymerization of ethylene oxide leads directly to a diblock PEO with an interior dipentaerythritol unit. The chain ends can be modified with further dipentaerythritols, giving access after selective deprotection to either star dimers or star trimers. PDMAEMA was either attached by ``grafting from'' procedure using atom transfer radical polymerization or ``grafting to'' approach using click chemistry. The advantages and disadvantages of the different approaches are discussed.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: TRANSFER RADICAL POLYMERIZATION; BLOCK-COPOLYMERS; CLICK CHEMISTRY; SUPRAMOLECULAR ASSEMBLIES; CATIONIC SUPRAMOLECULES; MULTIGRAFT COPOLYMERS; POLY(ETHYLENE GLYCOL); AQUEOUS-SOLUTIONS; MODEL NETWORKS; GENE DELIVERY
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Macromolecular Chemistry II
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Macromolecular Chemistry II > Chair Macromolecular Chemistry II - Univ.-Prof. Dr. Andreas Greiner
Profile Fields > Advanced Fields > Polymer and Colloid Science
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Profile Fields
Profile Fields > Advanced Fields
Result of work at the UBT: No
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 14 Apr 2015 07:17
Last Modified: 14 Apr 2015 07:17
URI: https://eref.uni-bayreuth.de/id/eprint/10075