Calcium-catalysed ring-opening copolymerisation of epoxides and cyclic anhydrides
Novel dinuclear calcium complexes have been employed as bifunctional catalysts for the ring-opening copolymerisation reaction of epoxides and cyclic anhydrides. The catalysts exhibited good performance and quantitative formation of ester linkages for the poly(CHO-alt-PA) production under mild reacti...
| Autores: | , , , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2014 |
| País: | España |
| Institución: | Universidad de Castilla-La Mancha |
| Repositorio: | RUIdeRA. Repositorio Institucional de la UCLM |
| OAI Identifier: | oai:ruidera.uclm.es:10578/42897 |
| Acceso en línea: | https://doi.org/10.1039/D4PY00379A https://hdl.handle.net/10578/42897 |
| Access Level: | acceso abierto |
| Palabra clave: | Calcium complexes Bifunctional catalysts Ring-opening copolymerisation Epoxides Cyclic anhydrides Polyester |
| Sumario: | Novel dinuclear calcium complexes have been employed as bifunctional catalysts for the ring-opening copolymerisation reaction of epoxides and cyclic anhydrides. The catalysts exhibited good performance and quantitative formation of ester linkages for the poly(CHO-alt-PA) production under mild reaction conditions and in the absence of a cocatalyst. Furthermore, these catalysts demonstrated tolerance to a variety of bio-sourced epoxides/phthalic anhydrides, providing access to a range of potentially functionalisable polyesters. On the other, polymerisation kinetic analyses revealed a half-order dependence on catalyst concentration and first-order dependence on cyclic anhydride concentration, whilst MALDI-ToF analyses supported an initiation step involving the ring-opening of the epoxide. Taken together, these findings underpin a mononuclear pathway, with the ring-opening of the cyclic anhydride identified as the rate-limiting step in the process. |
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