Cross-linked polymeric materials are utilized in numerous consumer and industrial coating applications due to their unique chemical and physical properties.  However, removal of these materials require environmentally harsh and potentially unsafe chemical treatments to break the covalent bonds within their cross-linked networks.  Further, removal of these cross-linked coatings from polymeric substrates, such as epoxy-based primers, often result in physical damage to the substrate.  This work describes a novel stimuli-responsive silyl-containing polyurethane thermoset, formed from the reaction of aliphatic isocyanates with synthesized silyl-diols and silyl-triols, which can be selectively removed from another cross-linked polymeric network.  The synthesized polyurethanes display excellent thermal stability, rigidity, and high cross-link density, yet can selectively disassemble via multi-directional cascading bond cleavage upon exposure to a fluoride salt stimulus.  Furthermore the rates of removal depend on the structure of the silyl diols/triols imparting tailored removal. Selective, damage-free removal of the polyurethane would enable a life-extension of the polymeric substrate.<br/>

Selective removal of stimuli-responsive cross-linked polyurethanes from polymeric substrates

Macromolecular Chemistry: The Second Century

[Author Benefits](https://scimeetings.acs.org/?utm_source=pubs_content_marketing&utm_medium=website&utm_campaign=0320_MCF_NPI_Launch_Spring_Homepage&ref=pubs_content_marketing)

[How to use SciMeetings](https://storage.googleapis.com/dl.morressier.com/acs/SciMeetings-ACSSpring2020-HowToGuide_M3020-Final.pdf)

[Frequently Asked Questions](https://storage.googleapis.com/dl.morressier.com/acs/SciMtng_ACSNMSp2020_FAQ_M3120_Final.pdf)

ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.