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Polymer micro and nanocomposites: Structure, interactions, properties
Ja´nos Mo´czo,Be´la Puka´nszky 한국공업화학회 2008 Journal of Industrial and Engineering Chemistry Vol.14 No.5
The characteristics of all heterogeneous polymer systems including composites containing either micro or nanofillers are determined by four factors: component properties, composition, structure and interfacial interactions. The most important filler characteristics are particle size, size distribution, specific surface area and particle shape, while the main matrix property is stiffness. Segregation, aggregation and the orientation of anisotropic particles determine structure. Interfacial interactions lead to the formation of a stiff interphase considerably influencing properties. Interactions are changed by surface modification, which must be always system specific and selected according to its goal. Under the effect of external load inhomogeneous stress distribution develops around heterogeneities, which initiate local micromechanical deformation processes determining the macroscopic properties of the composites. In filled polymers the dominating deformation mechanism is usually debonding. Nanocomposites represent one of the new classes of materials, but further research and development is needed before they gain significant position in the market.
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