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Materials With Improved Properties From Polymer-Ceramic Nanocomposites

Published online by Cambridge University Press:  10 February 2011

Frank-Dieter Kuchta ,
Piet J. Lemstra ,
Andrew Keller ,
Lawrence F. Batenburg  and
Hartmut R. Fischer
Frank-Dieter Kuchta
Affiliation:
Dutch Polymer Institute, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
Piet J. Lemstra
Affiliation:
Dutch Polymer Institute, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
Andrew Keller
Affiliation:
H. H. Wills Physics Laboratory, University of Bristol, Bristol BS8 1 TL, United Kingdom
Lawrence F. Batenburg
Affiliation:
TNO-TPD Materials Research & Technology, P. O. Box 595, 5600 AN Eindhoven, The Netherlands
Hartmut R. Fischer
Affiliation:
TNO-TPD Materials Research & Technology, P. O. Box 595, 5600 AN Eindhoven, The Netherlands
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Abstract

In order to link the fundamental research field of polymer crystallization with the technical important field of composite materials polymer-layered silicate nanocomposites from polyethylene (PE) are prepared and their morphology and properties are investigated. The effect of an external confinement introduced by highly anisotropic silicate layers of organically modified clay minerals on crystal growth and nanocomposite properties has been studied. The prepared nanocomposites of organically modified clay minerals and PE exhibit not only a homogeneous distribution of individual silicate layers but also of tactoids. The isothermal crystallization rate of PE in the corresponding nanocomposite at 120 °C is increased in the composite material due to the action of the silicate layers. A significant effect on crystal phase has not been observed so far but from X-ray experiments, however the crystal size seems to be influenced. The thermal stability of the nanocomposites is significantly enhanced and the decomposition mechanism has been changed due to the presence of the layered silicates within the host polymer acting as a barrier for the diffusion of small molecules like oxygen. Due to the none permanent attachment of the polymer chains to the silicate surface the thermal-mechanical properties are only moderately enhanced at low temperature while the glass transition temperature remains unaffected.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 576: Symposium DD – Organic/Inorganic Hybrid Materials II , 1999 , 363
Copyright
Copyright © Materials Research Society 1999

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References

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