Nylon 6/day nanocomposites

Fornes, T.D. and Paul, D.R. (2003) Modeling properties of nylon 6/day nanocomposites using composite theories. Polymer, 44 (17), 4993-5013. 

Recently, the advances in synthesis techniques and the abUity to characterize materials on atomic scale have led to a growing interest in nanosized materials. The invention of nylon 6/day nanocomposites by the Toyota Research Group of Japan heralded a new chapter in the field of polymer composites. Polymer nanocomposites combine these two concepts, that is, composites and nanosized materials. Polymer nanocomposites are materials containing inorganic components that have dimensions in nanometers. In this chapter, the discussion is restricted to polymer... 

Nylon 6-day nanocomposites of various day minerals with different cation exchange capadty (CEC) were prepared by in situ polymerization method, and properties such as mechanical, thermal, and gas permeability were compared with respect to pure nylon 6 (N6) polymer by Tsai et al. [35]. It is shown that the nature of the permeation of carbon dioxide gas depends on the exfoliation or intercalation of clay platelets. It is seen that the exfoliated clay platelets offer effective low permeability than the intercalated platelets as seen in Figure 8.2. 

Nanopartides, which have at least one length scale on the order of nanometers, can come in a variety of shapes (e.g., spherical, platdet, or rod-like). A surge of interest in nanocomposites came when Toyota reported the first synthesis of exfoliated nylon-6-day nanocomposite materials that exhibited enhanced mechanical properties over traditional composites. Since then, a wide range of inorganic indusions have been incorporated into polymer materials, resulting in a plethora of material properties. ... 

The increase of stress at break in thermoplastic-based nanocomposites is usually related to the nature of the interactions between the matrix and the filler. Table 5.1 shows the tensile stress values for different matrix day nanocomposites. Nanocomposites such as exfoliated nylon 6-based nanocomposites [78] or intercalated PMMA-based nanocomposites [80] exhibit an increase in the stress at break. This increase is usually due to the polar (PMMA) and even ionic interactions (nylon 6 grafted onto the layers) between the polymer and silicate layers. In polypropylene (PP) and PS nanocomposites, the interactions between polymer matrix and clay interface are weak, so no enhancements in tensile stress were observed. 

Nylon-6 nanocomposites from alkylammonium-modified day the role of alkyl tails on exfoliation. Macromolecules, 37,1793-1798. 

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