Study on crystallization of nylon 6 (polycapramide). III. Effect of “crystalline memory” on crystallization kinetics

Authors

  • E. Turska,

    1. Technical University of Lodz, Institute of Synthetic Fibers, Department of Physical Chemistry of Polymers, 90-924 Lodz, Poland
    Current affiliation:
    1. Institute of Polymers, Polish Academy of Sciences, 41-800 Zabrze, Poland
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  • S. Gogolewski

    1. Technical University of Lodz, Institute of Synthetic Fibers, Department of Physical Chemistry of Polymers, 90-924 Lodz, Poland
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Abstract

The effect of the initial degree of crystallinity on the isothermal crystallization kinetics from the melt of nylon 6 has been examined. The investigations were carried out in the conditions which allow to maintain a “crystalline memory.” For the investigations, dilatometric and microscopic methods were used depending on the temperature range used. It has been found that for samples of initial crystallinity up to 15% there exists a possibility of the growth of spherulites either from the sporadic or simultaneous nucleation depending on the crystallization temperature. For samples with initial degree of crystallinity higher than 15% the growth of spherulites occurred always from the predetermined nuclei within the investigated range of the crystallization temperature. The crystallization rate of the samples increased with rise in initial degree of crystallinity of the samples.

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