Ethylene polymerisation with hafnocene difencholate/MAO system: a comparison with other hafnocenes

Catalytic behaviour of Cp2Hf(OC10H17)2 in homogenous ethylene polymerisation activated by MAO is discussed in comparison with Cp2HfCl2/MAO and Cp2Hf(OC11H17)2/MAO systems. The influence of σ-bonded bridged alicyclic alcoholato-ligand on polymerisation process and polymer properties is shown. Dependence of the catalytic activity and the Mw of the polyethylene obtained on independent and dependent variables of the process are compared and discussed.