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Materials 2014, 7(3), 1995-2013; doi:10.3390/ma7031995

Metallocene Based Polyolefin Nanocomposites

Institute for Technical and Macromolecular Chemistry, University of Hamburg; Bundesstr. 45, 20146 Hamburg, Germany
Received: 25 November 2013 / Revised: 12 February 2014 / Accepted: 14 February 2014 / Published: 10 March 2014
(This article belongs to the Special Issue Nanocomposites of Polymers and Inorganic Particles 2013)
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Abstract

One of the most efficient and versatile ways to synthesize polyolefin nanocomposites is the in-situ polymerization of olefins in the presence of nano particles by metallocene catalysts. Metallocene/methylaluminoxane (MAO) catalysts are soluble in hydrocarbons and therefore they can be absorbed perfectly in solution onto the surface of particles or fibers and after addition of ethene or propene they can then catalyze a polyolefin film on the surface. Metallocene/MAO and other single site catalysts allow the synthesis of polymers with a precisely defined microstructure, tacticity, and stereoregularity as well as new copolymers with superior properties such as film clarity, high tensile strength and lower content of extractables. The polymer properties can be enlarged by the incorporation of nanofillers. The resulting polyethylene or polypropylene nanocomposites give a tremendous boost to the physical and chemical properties such as dramatically improved stiffness, high gas barrier properties, significant flame retardancy, and high crystallization rates.
Keywords: polyolefin nanocomposites; metallocene catalysts; inorganic particles; silica balls; carbon nanotubes; polyethylene; polypropylene polyolefin nanocomposites; metallocene catalysts; inorganic particles; silica balls; carbon nanotubes; polyethylene; polypropylene
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Kaminsky, W. Metallocene Based Polyolefin Nanocomposites. Materials 2014, 7, 1995-2013.

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