Chemistry Publications
Document Type
Article
Publication Date
Fall 12-14-2016
Journal
Macromolecules
Volume
49
Issue
24
First Page
9309
Last Page
9319
URL with Digital Object Identifier
https://doi.org/10.1021/acs.macromol.6b02320
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 disulfi de, 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 endcap 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.
Notes
This is an author-accepted version. Final, published version available at hhtps://doi.org/10.1021/acs.macromol.6b02320