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Phase Transition Between Matrix and Inclusions in Polymeric Composites

Published online by Cambridge University Press:  21 February 2011

P.S. Theocaris*
Affiliation:
Department of Theoretical and Applied Mechanics, The National Technical University of Athens 5, Heroes of Polytechnion Avenue, GR–157 73 Athens, Greece.
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Abstract

The influence of boundary layer on the coefficient of adhesion between fibers and matrix in polymer composites was investigated. A multilayer model was introduced consisting of the two main-phases of the composite,that is the elastic inclusion and the viscoelastic matrix and a third intermediate phase consisting of a series of cylindrical layers of mechanical and physical properties varying between the limit values of the matrix and inclusion. The extent of the interlayer between main phases may be determined from the overall properties of the composite and the matrix. The model proved to be very flexible and describes conveniently the behaviour of the material. Moreover, the model allowed the definition of an adhesion coefficient, convenient to describe the quality of adhesion of the component materials and the introduction of an improved expression for the law of mixtures in polymeric composites.

Type
Research Article
Copyright
Copyright © Materials Research Society 1984

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References

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