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Command-Destruct Thermosets via Photoinduced Thiol-Catalyzed ß-Scission of Acyclic Benzylidene Acetals

preprint
submitted on 23.07.2020 and posted on 24.07.2020 by William Walker, Michael Sandoz, Samuel Roland, Tony Buster, John Newman, Derek Patton

Photoinduced thiol-catalyzed hydrogen abstraction and ß-scission of acyclic benzylidene acetals is demonstrated as a new route to “command-destruct” polymer thermosets. Using this approach, we show that poly(thioether acetal) networks synthesized via thiol-ene photopolymerization rapidly degrade to alkyl benzoate byproducts when triggered with light, transitioning from solid to liquid within seconds. The light-driven construction and destruction processes, accessible via distinct differences in kinetics, are readily amendable for photopatterning, additive/subtractive manufacturing and wavelength-selective applications.

Funding

National Science Foundation CHE-1710589

National Science Foundation DGE-1449999

U.S. Army Engineer Research and Development Center, Contract No. W912HZ-18-C-0022

History

Email Address of Submitting Author

derek.patton@usm.edu

Institution

University of Southern Mississippi

Country

United States

ORCID For Submitting Author

0000-0002-8738-4750

Declaration of Conflict of Interest

No conflicts of interest

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