Identification and Count of the Active Sites in Olefin Polymerization Catalysis by Oxygen Quench | Zendy

Cipullo Roberta | Zendy; Mellino Simona | Zendy; Busico Vincenzo | Zendy

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Identification and Count of the Active Sites in Olefin Polymerization Catalysis by Oxygen Quench

Author(s) -

Cipullo Roberta,

Mellino Simona,

Busico Vincenzo

Publication year - 2014

Publication title -

macromolecular chemistry and physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.57

H-Index - 112

eISSN - 1521-3935

pISSN - 1022-1352

DOI - 10.1002/macp.201400156

Subject(s) - polymerization , catalysis , olefin fiber , chemistry , polymer chemistry , polymer , kinetics , olefin polymerization , oxygen , photochemistry , organic chemistry , quantum mechanics , physics

A simple method for the counting and structural elucidation of the different active sites in an olefin polymerization catalyst system is introduced, based on a reaction quench by O 2 under controlled kinetics, followed by NMR analysis of the OH‐labeled chain end‐groups formed upon acidic work‐up of the polymer. The method is successfully benchmarked using a molecular bis(phenoxyamino)Zr(IV)‐based catalyst characterized by a comparatively long‐lasting controlled kinetic transient at room temperature.

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