Abstract
AbstractThe effects of the dispersion of organic rectorite (OREC) and the cooling rate on the crystallization behavior of nylon 6/OREC nanocomposites have been systematically investigated with X‐ray diffraction, transmission electron microscopy, differential scanning calorimetry, and the modified Ozawa model. Some important parameters have been calculated, including the crystallization half‐time, crystallization peak temperature, and relative crystallinity. Experimental results indicate that the crystallization rate of the nylon 6/OREC nanocomposites is faster than that of nylon 6 at a given cooling rate, and the difference in the values of the Ozawa exponent for nylon 6 and nylon 6/OREC nanocomposites reveals tridimensional growth with heterogeneous nucleation. The analysis of the Ozawa exponent m has suggested that the better the dispersion of OREC is, the more suitable it will be for the formation of spherulitic growth. On the other hand, in analyses of the melting behavior, we have found an unusual phenomenon: the lower the cooling rate is, the more favorable it is for the formation of the γ form. Our experimental results indicate that the dispersion of OREC plays an important role in determining the crystallization behavior of nylon 6/OREC nanocomposites. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008
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