Dynamic-covalent nanostructures prepared by Diels-Alder reactions of styrene-maleic anhydride-derived copolymers obtained by one-step cascade block copolymerization

Bapat, Abhijeet P., Ray, Jacob G., Savin, Daniel A., Hoff, Emily A., Patton, Derek L. and Sumerlin, Brent S. (2012) Dynamic-covalent nanostructures prepared by Diels-Alder reactions of styrene-maleic anhydride-derived copolymers obtained by one-step cascade block copolymerization. Polymer Chemistry, 3 11: 3112-3120. doi:10.1039/c2py20351k


Author Bapat, Abhijeet P.
Ray, Jacob G.
Savin, Daniel A.
Hoff, Emily A.
Patton, Derek L.
Sumerlin, Brent S.
Title Dynamic-covalent nanostructures prepared by Diels-Alder reactions of styrene-maleic anhydride-derived copolymers obtained by one-step cascade block copolymerization
Journal name Polymer Chemistry   Check publisher's open access policy
ISSN 1759-9954
1759-9962
Publication date 2012
Sub-type Article (original research)
DOI 10.1039/c2py20351k
Open Access Status Not Open Access
Volume 3
Issue 11
Start page 3112
End page 3120
Total pages 9
Place of publication Cambridge, United Kingdom
Publisher Royal Society of Chemistry
Language eng
Abstract Macromolecular star formation by Diels-Alder chemistry resulted in dynamic nanomaterials capable of reversibly demonstrating the properties of both linear and highly branched macromolecules. Well-defined block copolymers of maleic anhydride (MAn) and styrene [poly(styrene-alt-MAn)-b-polystyrene (P(S-alt-MAn)-b-PS)] were prepared via a one-pot cascade approach by reversible addition-fragmentation chain transfer (RAFT) polymerization. Subsequent ring opening of the anhydride groups in the P(S-alt-MAn) segments by amidation with furfurylamine led to the formation of block copolymers with pendant furan functionality. Diels-Alder reactions of the furan-functional block copolymer with a bismaleimide crosslinker resulted in core-crosslinked stars by an arm-first approach. Star-like structures were also prepared by first allowing the furan-functional block copolymers to pre-assemble into polymeric micelles in a solvent selective for the polystyrene block. Subsequent addition of a bismaleimide and heating to allow the Diels-Alder reaction resulted in core-crosslinked micelles with similar structures to the polymeric stars prepared by the arm-first approach. Regardless of the synthetic approach employed, the thermoreversibility of the Diels-Alder linkages within the cores rendered the stars/crosslinked micelles dynamic-covalent, as demonstrated by their ability to reversibly dissociate back to the individual arms on heating.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Australian Institute for Bioengineering and Nanotechnology Publications
 
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Created: Sun, 27 Sep 2015, 14:00:55 EST by Abhijeet Bapat on behalf of Examinations