Coordinative chain transfer copolymerization of ethylene and styrene using an ansa-bis(fluorenyl) neodymium complex and dialkylmagnesium - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Polymer Chemistry Année : 2018

Coordinative chain transfer copolymerization of ethylene and styrene using an ansa-bis(fluorenyl) neodymium complex and dialkylmagnesium

Résumé

Coordinative chain transfer copolymerization of ethylene and styrene was successfully achieved using an ansa-bisfluorenyl neodymium complex, a dialkylmagnesium as a chain transfer agent and di-n-butylether (Bu2O) as a co-solvent. Under these conditions, a controlled chain growth was observed during the polymerization. Chain-end functionalization was performed and it revealed that both styryl and alkyl terminated chains shuttle between neodymium and magnesium. The analysis of the microstructure revealed that up to 3 mol% of styrene can be incorporated into the polymer. A computational mechanistic study at the DFT level was performed to characterize insertion selectivities and it further revealed the role of magnesium species in assisting β-H elimination.

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Chimie
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Dates et versions

hal-01877443 , version 1 (19-09-2018)

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Winnie Nzahou Ottou, Sebastien Norsic, Marie-Noelle Poradowski, Lionel Perrin, Franck d'Agosto, et al.. Coordinative chain transfer copolymerization of ethylene and styrene using an ansa-bis(fluorenyl) neodymium complex and dialkylmagnesium. Polymer Chemistry, 2018, 9 (23), pp.3262-3271. ⟨10.1039/c8py00712h⟩. ⟨hal-01877443⟩
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