Metal Complexes (Single or Combined) in the Polymerization Reactions

ISBN-13: 9783659158124 / Angielski / Miękka / 2012 / 96 str.

Luciano Gomes Furlan; Osvaldo De L. Casagrande Jr; Jean Fran Carpentier

Opis

In this work is reported, in a first step, the effect of different experimental parameters and their relation with polymer properties using the homogeneous binary catalyst system composed by Ni(α-diimine)Cl2 (α-diimine = 1,4-bis(2,6-diisopropylphenyl)-acenaphthenediimine) and {TpMs*}V(Ntbu)Cl2 (TpMs* = hydridobis(3-mesitylpyrazol-1-yl)(5-mesitylpyrazol-1-yl)) activated with MAO. This complexes combination produces, in a single reactor, polyethylene blends with different and controlled properties dependent on the polymerization temperature, solvent and Nickel molar fraction (xNi). In second, the control of linear low density polyethylene (LLDPE) production was possible, using a combination of catalyst precursors NiCl (TpMs = hydridotris(3-mesitylpyrazol-1-yl)) and Cp2ZrCl2, activated with MAO/TMA, as Tandem catalytic system. The catalytic activities as well as the polymer properties are dependent on xNi. Polyethylene with different Mw and controlled branches is produced only with ethylene monomer. Last, the application group 3 metals catalysts based, M(allyl)2Cl(MgCl2)2.4THF (M = Nd, La and Y), in isoprene polymerization with different cocatalysts systems and experimental

O autorze

Luciano Gomes Furlan received his Ph.D. (2005, double degree) in Chemistry (Federal University of Rio Grande do Sul and Universitè de Rennes 1)and post-doc in Polypropylene Nanocomposites (Federal University of Rio Grande do Sul and Braskem S.A.. He is currently Professor at the Federal Institute of Rio Grande do Sul.