Quantification of active sites in single-site group 4 metal olefin polymerization catalysis

摘要

This review gives an overview of approaches and techniques used for the assessment of active sites count in homogeneous group 4 metal single-site alpha-olefin polymerization. The main advantages and limitations of these methods, in particular their ability to selectively and quantitatively discern the catalytic sites effectively at work, leaving aside dormant sites and other metal species not directly involved in propagation, as well as the results of their application onto some important single-site olefin polymerization catalyst systems are exemplified. The associated mechanistic information is of interest for engineering more efficient catalytic systems reluctant towards side reactions. (C) 2019 Elsevier B.V. All rights reserved.