Syndiotactic polypropene with MCM-41 supported metallocene [Me2C(Cp)(Flu)]ZrCl2

Autor:	Christian Strübel, Seong Ihl Woo, Hans Lechert, Dieter Genske, Walter Kaminsky
Rok vydání:	2000
Předmět:	Polymers and Plastics Organic Chemistry Catalysis Propene chemistry.chemical_compound chemistry MCM-41 Sandwich compound Tacticity Polymer chemistry Materials Chemistry Melting point Mesoporous material Metallocene
Zdroj:	Macromolecular Rapid Communications. 21:909-912
ISSN:	1521-3927 1022-1336
DOI:	10.1002/1521-3927(20000801)21:13<909::aid-marc909>3.0.co;2-d
Popis:	Mesoporous aluminosilicates - type MCM-41 - were used as carriers for syndiospecific propolymerisation using [Me 2 C(Cp)(Flu)]ZrCl 2 /MAO catalyst. Alumina-free mesoporous MCM-41 reveals a far greater polymerisation activity than the analogous carrier containing alumina. The use of MCM-41 as carrier material at low propene concentration and high polymerisation temperature produces syndiotactic polypropene (sPP) with higher syndiotacticity and higher melting points than achieved when using a homogenous system or a supported system based on spherical SiO 2 . formula chim. rrrr-Pentad and melting-point of the syndiotactic polypropene produced by [Me 2 C(Cp)(Flu)]ZrCl 2 /MAO/MCM-41, [Me 2 C(Cp)(Flu)]ZrCl 2 /MAO/SiO 2 and [Me 2 C(Cp)(Flu)]ZrCl 2 / MAO under variation of the propene concentration.
Databáze:	OpenAIRE
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