Article (Scientific journals)
Metallocene catalyzed polymerization of ethylene in the presence of graphite. 1. Synthesis and characterization of the composites
Alexandre, Michaël; Pluta, Miroslaw; Dubois, Philippe et al.
2001In Macromolecular Chemistry and Physics, 202 (11), p. 2239-2246
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Keywords :
nanostructured material; nanocomposite; carbon graphite; metallocene-mediated polymerization; alkene
Abstract :
[en] Polyethylene/graphite composites have been prepared by two different methods. In a first approach, the ethylene polymerization has been catalyzed by metallo-cene in the presence of neat graphite particles (NGC composites). A second series of composites (TGC) has been prepared by the polymerization-filling technique, which requires that the metallocene/methylalumoxane catalyst is fixed onto the graphite surface prior to the ethylene polymerization. The two series of composites exhibit significantly different morphology and thermal properties. The filler distribution is very heterogeneous in the NGC series. The morphology changes from an intimate mixture of PE and filler particles at low graphite content to graphite covered by patches of PE at high filler loading. The graphite distribution is much more homogeneous in the TGC samples, and the morphology consists of particles covered by a layer of PE in the whole composition range. Differences in the thermal properties are discussed in relation to the morphology.
Research center :
Center for Education and Research on Macromolecules (CERM)
Disciplines :
Materials science & engineering
Chemistry
Author, co-author :
Alexandre, Michaël ;  Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Pluta, Miroslaw;  Polish Academy of Sciences, Lodz, Poland > Center of Molecular and Macromolecular Studies
Dubois, Philippe ;  Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Jérôme, Robert ;  Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Language :
English
Title :
Metallocene catalyzed polymerization of ethylene in the presence of graphite. 1. Synthesis and characterization of the composites
Publication date :
July 2001
Journal title :
Macromolecular Chemistry and Physics
ISSN :
1022-1352
eISSN :
1521-3935
Publisher :
Wiley-V C H Verlag Gmbh, Weinheim, Germany
Volume :
202
Issue :
11
Pages :
2239-2246
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
BELSPO - SPP Politique scientifique - Service Public Fédéral de Programmation Politique scientifique
Dow Europe, Terneuzen, The Netherlands
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