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Kinetics of polymerization of 1-octene with the catalyst systems VO(acac)2-AlEt3 (or AlEt2Br)

✍ Scribed by H. Kothandaraman; M.Saroja Devi

Publisher: Elsevier Science
Year: 1996
Tongue: English
Weight: 729 KB
Volume: 32
Category: Article
ISSN: 0014-3057
DOI: 10.1016/0014-3057(95)00147-6

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✦ Synopsis

The kinetics of I-octene polymerization by the catalyst systems VO(acac),-AlEt, (I) and VO(acac),-AlEt,Br (II) was investigated. A linear dependence of the rate of polymerization on the monomer and catalyst concentrations as well as the overall activation energy of 44.5 kJ/mol for both the catalyst systems was found. The dependence of the rate of polymerization on aluminium alkyl concentration is explained by Langmuir-Hinshelwood adsorption of the monomer and the aluminium alkyl. Characterization of the structure of the polymer by r3C-NMR spectra revealed the isotactic content. The mechanism of polymerization is discussed in relation to the kinetic data obtained.

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