Mesophases between Coupling Agents and Main Phases in Particulates

Abstract

Recent progress in the science of composites has resulted in the introduction of an inter mediate phase between the two main phases of the composite which plays the role either of a coupling agent to increase the adhesion between matrix and inclusions, or of an appro priate mesophase whose purpose is to improve the weaker properties of the composite, such as its toughness or ultimate strength. Previous papers introduced unfolding models based on the principle of smooth and progressive transition of the properties of one phase to those of the other. These models were appropriate for describing the bonding layer be tween an inert phase and a polymeric one. When two polymeric phases are in contact, cre ating their own mesophase, as in the case of polymeric coupling agents (for instance si lanes or rubber coatings), and polymeric matrices, a new model should be introduced to describe such mesophases based on the diffusion processes of these phases. Such a model is presented in this paper, and its characteristic properties are extensively discussed. Ex perimental evidence indicates the validity of the results derived from such diffused phase models.

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References

Theocaris, P.S. "The Mesophase and its Influence on the Mechanical Properties of Composites ," New Developments in the Characterization of Polymers in the Solid State, Advances in Polymer Science, Vol. 66. H. H. Kausch and H G. Zachmann , eds. Springer Verlag, chapt. 6, pp. 149-187 (1985).

Theocaris, P.S. and Th. Philippidis. "Theoretical Evaluation of the Extent of Mesophase in Particulate and Fibrous Composites," Jnl. Reinf. Plastics and Comp. , 4(2):173-185 (1985).

Theocaris, P.S. The Concept of Mesophase in Composites. Berlin: Springer Verlag (1987).

Kinloch, A.J. "The Science of Adhesion," Review, Part I., Jnl. of Material Science, 15:2141-2166 (1980).

Froment, G.F. and K.B. Bischoff. Chemical Reactor Analysis and Design. New York:John Wiley (1979).

Ishida, H. "A Review of Recent Progress in the Studies of Molecular and Microstructure of Coupling Agents and Their Functions in Composites, Coatings and Adhesive Joints:" Polymer Composites, 5(2).101-123 (1984).

Theocaris, P.S. "Synergism Phenomena Between Phases in Composites: The Mesophase" Colloid and Polymer Science ( 1987).

Jones, R. Mechanics of Composite Materials. New York: McGraw-Hill Publ (1975).

Theocaris, P.S. and Th. Philippidis. "Influence of the Mesophases on the Mechanical Properties of Three-Phase Composites," Jnl. Materials Science, vol. 22 (1987).