Abstract
The polymerization of ethylene has been studied in the presence of novel catalytic systems based on various sterically hindered phenol precursor complexes of titanium containing grafted phenoxyammonium ligands. The presence of the grafted ammonium salt in the phenolate ligand leads to an increase in the activity of the catalyst and originates single-site catalytic systems. As evidenced by IR and 13C NMR studies and DSC measurements, the resulting polymers are linear, possess a narrow molecular-mass distribution (Mw/Mn = 2–4), and are characterized by a wide range of thermal properties.
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