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Viscoelastic and Mechanical Properties of Polyimide-Clay Nanocomposites

Published online by Cambridge University Press:  01 February 2011

Mohamed O. Abdalla ,
Derrick Dean  and
Sandi Campbell
Mohamed O. Abdalla
Affiliation:
Tuskegee-Center for Advanced Materials, 101 Chappie James Center, Tuskegee University, Tuskegee, Alabama 36088
Derrick Dean
Affiliation:
Tuskegee-Center for Advanced Materials, 101 Chappie James Center, Tuskegee University, Tuskegee, Alabama 36088
Sandi Campbell
Affiliation:
NASA Glenn Research Center, Cleveland, Ohio, 44135.
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Abstract

Polyimide-clay nanocomposites were prepared by blending 2.5 and 5 wt.% of PGV (Na+-montmorillonite) and two organically modified PGV (PGVC10COOH, PGVC12) with a methanol solution of PMR-15 precursor. DMA results showed a significant increase in the thermomechanical properties (E' and E'') of 2.5 wt.% clay loaded nanocomposites in comparison with the neat polyimide. Increasing the clay loading to 5 wt.% degraded these properties. Higher Tgs were observed for 2.5 wt.% nanocomposites compared to the neat polyimide. A lower CTE was observed only for the PGV/PMR-15 nanocomposite. Flexural properties measurements for the 2.5 wt.% nanocomposites showed an improvement in the modulus, strength and elongation. This trend in the tensile properties was not observed for the 5 wt.% nanocomposites.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 726: Symposium Q – Hybrid Organic-Inorganic Materials , 2002 , Q6.30
Copyright
Copyright © Materials Research Society 2002

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