The co-polymerization of ethylene with 1-hexene has been performed with titanium precursors based on carboxylato ligands in the presence of organoaluminium compounds as activators to afford linear low-density polyethylenes (LLDPEs). The influence of the polymerization parameters was studied with particular reference to the type and amount of catalyst components, solvent, temperature, ethylene pressure, 1-hexene concentration. The chloro-substituted bis-carboxylato titanium complex resulted the most active precursor in the co-polymerization, allowing to obtain copolymers with modulable composition in the 1-5 mol% range of 1-hexene units. The obtained copolymers were characterized by thermal analysis, X-ray diffraction spectroscopy, FTIR and NMR techniques. (c) 2007 Elsevier Ltd. All rights reserved.
|Autori:||Carlini C; D'Alessio A; Giaiacopi S; Pracella M; Raspolli Galletti A; Sbrana G|
|Titolo:||Linear low-density polyethylenes by co-polymerization of ethylene with 1-hexene in the presence of titanium precursors and organoaluminium co-catalysts|
|Anno del prodotto:||2007|
|Digital Object Identifier (DOI):||10.1016/j.polymer.2007.01.009|
|Appare nelle tipologie:||1.1 Articolo in rivista|