Cross-linked networks, such as thermosetting and UV-curable polyurethanes, are utilized in numerous commercial applications due to the unique mechanical, thermal, and chemical resistive properties imparted by the formation of irreversible covalent bonds.  However, cross-linked networks are difficult to degrade unless harsh chemical or thermal treatments are employed, which often results in environmental and safety issues.  To address this issue, we have developed novel silyl-containing polyurethane networks that possess degradable capabilities.  These coatings are thermally stable and highly cross-linked, yet will disassemble on-demand via cascading bond cleavage when exposed to selective, mild, and relatively benign fluoride salt solutions.  Furthermore, these networks are resistant to disassembly with strong acid and base solutions, which demonstrates their selectivity and robustness compared to other degradable cross-linked networks.  This presentation will focus on the synthesis of the silyl-based molecules used in these novel polyurethane networks.<br/>

Cross-linked networks that disassemble in fluoride salt solutions

2019 Spring National Meeting

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