Catalyst Deactivation Processes during 1-Hexene Polymerization

被引：23
|
作者：
Joshi, Anuj [1 ]
Zijlstra, Harmen S. [1 ]
Collins, Scott [1 ]
McIndoe, J. Scott [1 ]
机构：
[1] Univ Victoria, Dept Chem, Victoria, BC V8W 2Y2, Canada
来源：
ACS CATALYSIS | 2020年 / 10卷 / 13期
基金：
加拿大自然科学与工程研究理事会;
关键词：
olefin polymerization; metallocene catalyst; electrospray ionization; mass spectrometry; MASS-SPECTROMETRIC CHARACTERIZATION; PRESSURIZED SAMPLE INFUSION; ZIRCONIUM-ALLYL COMPLEXES; PROPENE POLYMERIZATION; OLEFIN POLYMERIZATION; ETHYLENE POLYMERIZATION; ALUMINUM ALKYLS; METALLOCENE; IONIZATION; KINETICS;
D O I：
10.1021/acscatal.0c01607
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
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.
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页码：7195 / 7206
页数：12
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