Polymerization of Higher alpha-Olefins Using a C-s-Symmetry Hafnium Metallocene Catalyst. Kinetics of the Polymerization and Microstructural Analysis

Vasilios Kotzabasakis; Konstantinos Kostakis; Marinos Pitsikalis; Nikos Hadjichristidis; David J. Lohse; Thomas Mavromoustakos; Constantinos Potamitis

doi:10.1002/pola.23483

Journal article

Polymerization of Higher alpha-Olefins Using a C-s-Symmetry Hafnium Metallocene Catalyst. Kinetics of the Polymerization and Microstructural Analysis

Vasilios Kotzabasakis, Konstantinos Kostakis, Marinos Pitsikalis, Nikos Hadjichristidis, David J. Lohse, Thomas Mavromoustakos and Constantinos Potamitis

Journal of polymer science. Part A, Polymer chemistry, Vol.47(17), pp.4314-4325

01/09/2009

DOI: https://doi.org/10.1002/pola.23483

Abstract

Physical Sciences

Polymer Science

Science & Technology

The C-s-symmetry hafnium metallocene [(p-Et3Si)C6H4](2)C(2,7-di-tert-BuFlu) (C5H4)Hf(CH3)(2) and tetrakis(pentafluorophenyl) borate dimethylanilinium salt ([B(C6F5)(4)](-)[Me2NHPh](+)) were used as the catalytic system for the polymerization of higher alpha-olefins (from hexene-1 to hexadecene-1) in toluene at 0 degrees C. The evolution of the polymerization was studied regarding the variation of the molecular weight, molecular weight distribution and yield with time. The effect of the monomer structure on the polymerization kinetics was established. The role of trioctylaluminum in accelerating the polymerization was investigated. C-13 NMR spectroscopy was used to study the microstructure of the poly(alpha-olefins) by the determination of the pentad monomer sequences. The thermal properties of the polymers were obtained by differential scanning calorimetry, DSC. The results were discussed in connection with the polymer microstructure. (C) 2009 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 47: 4314-4325, 2009

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Title: Polymerization of Higher alpha-Olefins Using a C-s-Symmetry Hafnium Metallocene Catalyst. Kinetics of the Polymerization and Microstructural Analysis
Creators - without role: Vasilios Kotzabasakis - National and Kapodistrian University of Athens
Konstantinos Kostakis - National and Kapodistrian University of Athens
Marinos Pitsikalis - National and Kapodistrian University of Athens
Nikos Hadjichristidis - National and Kapodistrian University of Athens
David J. Lohse - ExxonMobil
Thomas Mavromoustakos - National and Kapodistrian University of Athens
Constantinos Potamitis - National and Kapodistrian University of Athens
Publication Details: Journal of polymer science. Part A, Polymer chemistry, Vol.47(17), pp.4314-4325
Publisher: Wiley
Number of pages: 12
Grant note: Ministry of Education through the Operational Program and Initial Educational Vocational Training on "Polymer Science and its Applications" Research Committee of the University of Athens
Identifiers: 9944211608331
Academic Unit: King Abdullah University of Science & Technology
Language: English
Resource Type: Journal article