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    Author(s): Mingjun Yuan; Lih-Sheng Turng; Shaoqin Gong; Andreas Winardi
    Date: 2004
    Source: Journal of cellular plastics. Vol. 40 (Sept. 2004): Pages 397-409
    Publication Series: Miscellaneous Publication
    PDF: View PDF  (205 KB)

    Description

    The crystallization behaviors of polyamide-6 (PA-6) and its nanocomposites undergoing the microcellular injection molding process are studied using Transmission Electron Microscopy (TEM), X-ray Diffractometer (XRD), Polarized Optical Microscopy (POM), and Differential Scanning Calorimetry (DSC). The relationships among the morphology, the mechanical property of the molded parts, and the crystallization behavior are investigated. With the addition of nanoclays in microcellular injection molded parts, the growth of the a -form crystal is suppressed and the formation of g -form crystals is promoted. Both nanoclay and dissolved gas have a big influence on PA-6 crystalline structures. The existence of nanoclay increases the initial crystallization rate. But with extra addition of nanoclays in the polymer matrix, the increase of crystallization rate is reduced. Microcellular injection molded nanocomposites with proper amount of nanoclays possess the maximum crystallization activation energy and produce a finer and denser microcell structure which leads to better mechanical properties.

    Publication Notes

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    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Yuan, Mingjun; Turng, Lih-Sheng; Gong, Shaoqin; Winardi, Andreas. 2004. Crystallization behavior of polyamide-6 microcellular nanocomposites. Journal of cellular plastics. Vol. 40 (Sept. 2004): Pages 397-409

    Keywords

    Microcellular injection molding, polyamide-6, nanocomposite, crystallization, montmorillonite, (MMT)

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