13C NMR determination of the microstructure of polypropylene obtained with the DADNi(NCS)2/methylaluminoxane catalyst system

Autor: Galland, Griselda Barrera, Silva, Luciana P. Da, Dias, Marcos L., Crossetti, Geraldo L., Ziglio, Cláudio M., Filgueiras, Carlos A. L.
Zdroj: Journal of Polymer Science Part A: Polymer Chemistry; 1 May 2004, Vol. 42 Issue: 9 p2171-2178, 8p
Abstrakt: A complete 13C NMR characterization of a polymer synthesized with a new Ni-diimine complex [DADNi(NCS)2, where DAD = 2,6-iPr&bond;C6H3&bond;N&dbond;C(Me)&bond;C(Me)&dbond; N&bond;2,6-iPr&bond;C6H3] activated by methylaluminoxane by homopolymerization of propylene is presented. The amorphous material was made up mainly of blocks of syndiotactic polypropylene and ethylene–propylene copolymer. Some degree of propylene inversion (<1.2 mol %) and of long isobutyl and 2-methyl hexyl branching (<1 mol %) were assigned and quantified. © 2004 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 42: 2171–2178, 2004
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