End-Capping Strategies for Triggering End-to-End Depolymerization of Polyglyoxylates

Bo Fan, John F. Trant, Elizabeth R. Gillies

Research output: Contribution to journalArticleResearchpeer-review

34 Citations (Scopus)

Abstract

Polymers that undergo end-to-end depolymerization in response to the cleavage of a stimuli-responsive end-cap are promising for diverse applications from drug delivery to responsive coatings and plastics. It is critical that the end-cap is designed to respond to an appropriate stimulus for the application. In the current work, end-caps for triggering the depolymerization of poly(ethyl glyoxylate) (PEtG) were explored. First, a phenylboronate, a disulfide, and an azobenzene were utilized to impart redox-responsive properties to PEtG. Then, methoxy-substituted trityl groups were used to provide sensitivity to mild acid. A multiresponsive platform was also introduced, allowing PEtG to respond to multiple stimuli, either simultaneously or independently. Incorporation of a cross-linkable trialkene end-cap enabled the preparation of networks that could subsequently be depolymerized. Finally, high molar mass PEtG could be depolymerized by mechanical stimulation independent of the end-cap. It is anticipated that the versatility in end-capping strategies and potential depolymerization stimuli will not only expand PEtG’s utility for different applications but also be useful for other classes of end-to-end depolymerizable polymers.

Original languageEnglish
Pages (from-to)9309-9319
Number of pages11
JournalMacromolecules
Volume49
Issue number24
DOIs
Publication statusPublished - 27 Dec 2016
Externally publishedYes

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