Deakin University
Browse

File(s) under permanent embargo

Oximes as reversible links in polymer chemistry: dynamic macromolecular stars

journal contribution
posted on 2014-01-01, 00:00 authored by S Mukherjee, Abhijeet Bapat, M Hill, B Sumerlin
We demonstrate the formation of oxime-functional macromolecular stars that are able to dissociate and reconstruct themselves upon application of a stimulus. The reversible nature of the oxime bond in the presence of externally added alkoxyamines or carbonyl compounds enables reconfiguration via competitive exchange. Reversible addition–fragmentation chain transfer (RAFT) polymerization was utilized to prepare well-defined amphiphilic block copolymers in which a hydrophobic keto-functional block allowed self-assembly into micelles in water. Adding a difunctional alkoxyamine small molecule to these solutions resulted in crosslinking of the micelles to yield macromolecular stars. The reversible nature of the O-alkyl oxime linkages was demonstrated via competitive exchange with excess of carbonyl compounds or monofunctional alkoxyamine under acidic conditions and at elevated temperatures to result in dissociation of the stars to unimolecular oxime-functional polymer chains.

History

Journal

Polymer chemistry

Volume

5

Issue

24

Pagination

6923 - 6931

Publisher

Royal Society of Chemistry

Location

Cambridge, Eng.

ISSN

1759-9954

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2014, The Royal Society of Chemistry

Usage metrics

    Research Publications

    Categories

    No categories selected

    Keywords

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC