Controlling polymer composition starting from mixtures of monomers is an important, but rarely achieved, target. Here a single switchable catalyst for both ring-opening polymerization (ROP) of lactones and ring-opening copolymerization (ROCOP) of epoxides, anhydrides, and CO2 is investigated, using both experimental and theoretical methods. Different combinations of four model monomers-ε-caprolactone, cyclohexene oxide, phthalic anhydride, and carbon dioxide-are investigated using a single dizinc catalyst. The catalyst switches between the distinct polymerization cycles and shows high monomer selectivity, resulting in block sequence control and predictable compositions (esters and carbonates) in the polymer chain. The understanding gained of the orthogonal reactivity of monomers, specifically controlled by the nature of the metal-chain end group, opens the way to engineer polymer block sequences.
|Number of pages||12|
|Journal||Journal of the American Chemical Society|
|Early online date||22 Mar 2016|
|Publication status||Published - 30 Mar 2016|
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- Department of Chemistry - Royal Society University Research Fellow
- Centre for Sustainable and Circular Technologies (CSCT)
- Institute for Sustainability
Person: Research & Teaching, Core staff, Researcher
High Performance Computing (HPC) Facility
Steven Chapman (Manager)University of Bath