Catalyst Deactivation Processes During 1-Hexene Polymerization

06 April 2020, Version 1
This content is a preprint and has not undergone peer review at the time of posting.

Abstract

The catalyst [Cp2Zr(μ-Me)2AlMe2]+[B(C6F5)4] (1) has been studied by electrospray ionisation mass spectrometry (ESI-MS) in order to better understand the complexities of catalyst deactivation in the polymerisation of 1-hexene. Using offline, online and flow-based methods, we observe that zirconium π-allyl species are unstable in solution and previously unobserved dimethylalane complexes are more stable. The dimethylalane complexes are resistant to further 1-hexene additions and their formation represent a new pathway for catalyst deactivation.

Keywords

Polymerization
catalyst deactivation
dimethylalane
electrospray ionization
mass spectrometry
1-hexene

Supplementary materials

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