Physico-Mechanical Properties and Morphology of Nanocomposites

Physico-Mechanical Properties and Morphology of Nanocomposites

DOI: 10.4018/978-1-7998-9728-6.ch010
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Abstract

The technology of nanocomposites based on polyamide-6 (PA-6) and modified montmorillonite is developed. The technological parameters of extrusion and injection molding, and their influence on the formation of nanoscale inorganic phase of the polyamide are investigated. Morphology and thermal behavior of polyamide-6, composites based on PA-6 and modified montmorillonite are studied by WAXS, XRD, DTA and DSC data. New γ-phase formation is revealed in composite polyamide-6 – 1 – 2% of modified montmorillonite. Optimal concentrations of modified montmorillonite in the composites stated as 1 – 2% are shown to correspond with composites improved properties as compared to initial polyamide-6. It is explained by increasing crystallinity degree, which resulted from acting of modified montmorillonite particles as nucleation heterogenetic agents.
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Production Technology, Morphology And Physical And Mechanical Properties Of Nanocomposites Based On Thermoplastics And Organomodified Montmorillonite

Physico-mechanical characteristics of nanocomposites are one of the most significant in the study of changes that occur during the transition from macro to nanostructure.

In obtaining nanocomposites based on polymer matrices of different nature and clay minerals, a significant increase in the physical and mechanical properties of composites with a relatively low content of clay mineral is quite naturally and predictably observed. Such a change in the properties of polymer composites is inherent in the transition from macro to nanoscale structure.

As mentioned above, the physical and mechanical properties of polymer nanocomposites are influenced by the following factors:

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    the size and shape of the filler particles;

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    the orientation of the filler particles and their relative position in the matrix;

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    degree of filling;

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    interaction between filler and binder;

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    characteristics of the polymer matrix.

Moreover, the influence on the physical and mechanical properties of the technological parameters of injection molding in the production of products should be taken into account.

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