Macromolecular Rapid Communications, Vol.24, No.3, 251-254, 2003
Influence of alkylaluminium activators and mixtures thereof on ethylene polymerization with a tridentate bis(imino)pyridinyliron complex
The effect of various alkylaluminium compounds and their mixture on ethylene polymerization catalyst is studied. Triethylaluminium and trihexylaluminium are good cocatalysts but yield polyethylenes with broad molar mass distribution (MMD) whereas triisobutylaluminum, a less efficient activator, gives polyethylenes with unimodal and narrow MMD. Specific mixtures of branched and linear alkylaluminium compounds yield highly active catalytic systems and polyethylenes with unimodal and tunable MMD.