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.

引用

页码：7195 / 7206

页数：12

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