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Clay-Polymer Nanocomposites: Polyether and Polyimide Systems

Published online by Cambridge University Press:  21 February 2011

Thomas J. Pinnavaia ,
Tie Lan ,
Padmananda D. Kaviratna  and
Muh S. Wang
Thomas J. Pinnavaia
Affiliation:
Department of Chemistry and Center for Fundamental Materials Research Michigan State University, East Lansing, Michigan 48824
Tie Lan
Affiliation:
Department of Chemistry and Center for Fundamental Materials Research Michigan State University, East Lansing, Michigan 48824
Padmananda D. Kaviratna
Affiliation:
Department of Chemistry and Center for Fundamental Materials Research Michigan State University, East Lansing, Michigan 48824
Muh S. Wang
Affiliation:
Department of Chemistry and Center for Fundamental Materials Research Michigan State University, East Lansing, Michigan 48824
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Abstract

A new type of clay-polyether nanocomposite has been prepared by the self-polymerization of diglycidyl ether of bisphenol A in the galleries of acidic alkylammonium ion exchanged forms of montmorillonite. The acid catalyzed intragallery polymerization process leads to the spontaneous exfoliation to the 10Å-thick clay layers. Intra- and extragallery polymerization processes are distinguishable by DSC.

Clay-polyimide hybrid composites have also been prepared by the intercalation of polyamic acid in montmorillonites and subsequent thermal conversion to polyimide. In contrast to the completely exfoliated clay-polyether system, the polyimide system contain regularly intercalated clay aggregates in the polymer matrix. Although regular face-face clay layer aggregation is extensive, the clay-polyimide hybrid composite films exhibit greatly improved CO2 barrier properties.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 346: Symposium N – Better Ceramics Through Chemistry VI , 1994 , 81
Copyright
Copyright © Materials Research Society 1998

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References

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