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Macromolecular metamorphosis via stimulus-induced transformations of polymer architecture

journal contribution
posted on 2017-02-20, 00:00 authored by Hao Sun, Christopher P Kabb, Yuqiong Dai, Megan R Hill, Ion Ghiviriga, Abhijeet Bapat, Brent S Sumerlin
Macromolecular architecture plays a pivotal role in determining the properties of polymers. When designing polymers for specific applications, it is not only the size of a macromolecule that must be considered, but also its shape. In most cases, the topology of a polymer is a static feature that is inalterable once synthesized. Using reversible-covalent chemistry to prompt the disconnection of chemical bonds and the formation of new linkages in situ, we report polymers that undergo dramatic topological transformations via a process we term macromolecular metamorphosis. Utilizing this technique, a linear amphiphilic block copolymer or hyperbranched polymer undergoes ‘metamorphosis’ into comb, star and hydrophobic block copolymer architectures. This approach was extended to include a macroscopic gel which transitioned from a densely and covalently crosslinked network to one with larger distances between the covalent crosslinks when heated. These architectural transformations present an entirely new approach to ‘smart’ materials.

History

Journal

Nature chemistry

Volume

9

Issue

August

Pagination

817 - 823

Publisher

Springer Nature

Location

London, Eng.

ISSN

1755-4330

eISSN

1755-4349

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2017, Macmillan Publishers Limited, part of Springer Nature.

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