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ISSN Print: 1543-1649
ISSN Online: 1940-4352
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INTERPHASE AND AGGREGATION: TWO EFFECTIVE PARAMETERS ON MECHANICAL BEHAVIOR OF POLYMER NANOCOMPOSITES
ABSTRACT
In this study, the quasistatic mechanical behavior of Nylon-6/silica nanocomposite is examined through a hybrid experimentalcomputational approach. Two factors, particle aggregation and the interphase layer, which affect the properties of such nanocomposites, are investigated. The polymer matrix behavior in the bulk and interphase regions is described using a hyperelastic material model calibrated by experimental tension test results conducted at room and reduced temperatures. The characteristics of the interphase and bulk polymer identified are used in a finite element representative volume element (RVE) to study the effects of particle aggregation and the presence of the interphase layer. The degree of particle dispersion in the RVE is defined using a parameter termed the degree of aggregation. Simulation results show that in the absence of an interphase layer, the mechanical properties of nanocomposites are independent of the degree of aggregation. However, with the presence of an interphase layer, the aggregation of nanoparticles decreases the mechanical properties of Nylon-6/silica nanocomposite.
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