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Isothermal crystallization kinetics of glass fiber and mineral-filled polyamide 6 composites

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Abstract

In this study, isothermal crystallization kinetics of polyamide 6 (PA6) composites reinforced with surface-treated glass fiber (GF) and natural, clay-type mineral (MN) were investigated by differential scanning calorimetry method in the presence and absence of a nucleating agent (NA). Microstructural features of the composites and interfacial interactions between filler and polyamide phases were also quantified by rheological measurements. The kinetic parameters for the isothermal melt-crystallization process of the samples were determined with the Avrami and Lauritzen–Hoffman models. The crystallization activation energies were determined by the Arrhenius method. It was found that the both fillers yielded a significant increase in the storage modulus of PA6. Kinetic calculations showed that the MN has a more pronounced acceleration effect on the crystallization rate of PA6 than the GF. Introduction of a small amount of NA significantly favored the isothermal crystallization rate of GF-reinforced PA6 but did not accelerate that of MN-reinforced one. Based on the results, it has been highlighted that PA6 composites reinforced with surface-treated GFs and including a small amount of clay-like mineral as a cheap and easy-accessible minor filler could yield the best performance for the injection-molded PA6 parts because the GF enhances the mechanical properties and the clay-like mineral accelerates the crystallization rate.

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Authors and Affiliations

  1. R&D Department, EPSAN Plastics, Ali Osman Sönmez Cad. No:16, Bursa, Turkey

    Selen Şanlı

  2. Department of Chemical Engineering, Engineering Faculty, Istanbul University, 34320, Avcılar, Istanbul, Turkey

    Ali Durmus & Nevra Ercan

Authors
  1. Selen Şanlı
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  2. Ali Durmus
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  3. Nevra Ercan
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Correspondence to Ali Durmus.

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Şanlı, S., Durmus, A. & Ercan, N. Isothermal crystallization kinetics of glass fiber and mineral-filled polyamide 6 composites. J Mater Sci 47, 3052–3063 (2012). https://doi.org/10.1007/s10853-011-6137-9

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  • DOI: https://doi.org/10.1007/s10853-011-6137-9

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