Peculiarities of Ethylene Polymerization Reactions with Bis(imino)pyridyl Complexes of CoCl2 and FeCl2.

Autor:	Rishina, Laura A., Kissin, Yury V., Lalayan, Svetlana S., Antonov, Artem A., Krasheninnikov, Vadim G., Gulin, Alexander A.
Předmět:	TRANSITION metal catalysts ETHYLENE POLYMERIZATION MOLECULAR weights
Zdroj:	Chinese Journal of Polymer Science (Springer Science & Business Media B.V.); Apr2024, Vol. 42 Issue 4, p492-500, 9p
Abstrakt:	The article describes ethylene polymerization reactions with transition metal catalysts based on complexes of CoCl2 and FeCl2 with an N,N,N-tridentate ligand 2,6-bis[1-(2,6-dimethylphenylimino)ethyl]pyridine. The complexes are converted into polymerization catalysts by reacting them either with polymethylalumoxane (MAO) or with a combination of Al(C2H5)2Cl and Mg(C4H9)2 at an [Al]:[Mg] ratio of ~3. Both MAO-activated complexes readily polymerize ethylene at 35 °C with the formation of linear, low molecular weight polymers with a narrow molecular weight distribution. The same complexes, when activated with the Al(C2H5)2Cl-Mg(C4H9)2 combination, form multi-center catalysts and generate polyethylenes with a broad molecular weight distribution. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
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