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Catalyst Deactivation Processes during 1-Hexene Polymerization
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DOI：10.1021/acscatal.0c01607.png)
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Abstract
En 中文
The catalyst [Cp2Zr(mu-Me)(2)AlMe2](+) [B(C6F5)(4)](-) ( 1 ) has been studied by electrospray ionization mass spectrometry in order to better understand the complexities of catalyst deactivation in the polymerization of 1-hexene. Using off-line, online, and flow-based methods, we observe that zirconium pi-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 represents a previously unrecognized pathway for catalyst deactivation.
Keywords:
olefin polymerization
metallocene catalyst
electrospray ionization
mass spectrometry
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