Abstract

GC data on oligomers formed in ethylene homopolymerization and copolymerization reactions with several α-olefins (1-butene, 1-pentene, 1-hexene, 4-methyl-1-pentene) using Ti- and V-based catalysts are presented. Structural analysis of the oligomers provided a detailed confirmation of the chemical mechanism of chain formation in olefin polymerization with Ziegler-Natta catalysts. The mechanism includes chain initiation (monomer insertion into M-C or M-H bonds), chain growth (predominantly head-to-tail olefin insertion), and chain termination with hydrogen, monomer, and an organoaluminum compound

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