Ring opening polymerisations of cyclic esters and carbonate by rare-earth LnCp3 |
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| Authors: | Seema Agarwal Mario Puchner |
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| Affiliation: | Philipps-Universität Marburg, Fachbereich Chemie, Institut für Physikalische Chemie, Kern-chemie und Makromolekulare Chemie und Wissenschaftliches Zentrum für Materialwissenschaften, Hans-Meerwein Strasse, D-35032, Marburg, Germany |
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| Abstract: | The ring opening polymerisation of cyclic esters (ε-caprolactone and l-lactide) and cyclic carbonate (1,3-dioxan-2-one (TMC)) initiated with LnCp3 complexes (Ln=Sm, Er, Pr, Gd and Ce) is reported. The size of the metal atom has an effect on the catalytic activity. The order of reactivity was found to be Er∼Gd>Sm>Pr>Ce. The polyester chains were found to be living for successful synthesis of block copolymers. Polycarbonate (polyTMC) was obtained without CO2 elimination using LnCp3 as an initiator. |
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| Keywords: | LnCp3 catalysts Ring opening polymerisations Cyclic esters and carbonate |
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