Products Cited in Publications Worldwide Controlled anionic polymerization mediated by carbon dioxide

Controlled anionic polymerization mediated by carbon dioxide

Jacky, Paige E; Easley, Alexandra D; Fors, Brett P

DOI: PMID:

Abstract

Anionic polymerizations of vinyl monomers are powerful synthetic platforms for making well-defned materials. However, these reactions are extremely sensitive to moisture and oxygen, require the use of highly purifed reagents, must be run at low temperatures, and use hazardous and difcult-to-handle alkyl lithium initiators. Together, these drawbacks limit the practicality of these polymerizations and impede their widespread usage. On this basis, the development of a user-friendly anionic polymerization process for methacrylates is a grand challenge. Here we report an anionic polymerization of methacrylates mediated by CO2 that can be run at elevated temperatures and uses an easy-to-handle solid initiator. The reversible addition of CO2 to the enolate chain end efciently tempers the reactivity of the anion, giving polymers with narrow molar mass distributions and excellent molecular weight targeting at elevated temperatures. Our scalable and more user-friendly CO2-mediated method improves the accessibility and safety of anionic polymerizations and facilitates the production of a variety of polymeric materials.

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