Transition metal alkyl compounds heterogeneous polymerization catalysts

IV. Heterogeneous Polymerization Catalysts Derived from Transition Metal Alkyl Compounds... 

For catalytic olefin polymerization on heterogeneous ZN catalysts, it is accepted that surface alkyl compounds of transition metals should be considered as the active centers. These species contain a growing polymer chain as an alkyl group. For analysis of the kinetics and mechanism of polymerization on ZN catalysts, it is all-important to have data on the number of active centers (Cp). The number of... 

Both homogeneous and heterogeneous Ziegler-Natta catalysts must be activated by a cocatalyst. Cocatalysts are alkyl aluminum compounds such as trimethyl aluminum (TMA) and triethyl aluminum (TEA). Cocatalysts are essential for polymerization with Ziegler-Natta, metallocene and late transition metal catalysts, as will be explained below. 

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