Rheological behavior of polyamide 11 with varying initial moisture content

Authors

  • Stefano Acierno,

    1. Department of Chemical Engineering, Katholieke Universiteit Leuven, W. de Croylaan 46, B-3001 Leuven, Belgium
    Current affiliation:
    1. Università degli Studi di Napoli “Federico II” Dipartimento di Ingegneria Chimica Piazzule V. Tecchio, 8080125 Napoli, Italy
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  • Peter Van Puyvelde

    Corresponding author
    1. Department of Chemical Engineering, Katholieke Universiteit Leuven, W. de Croylaan 46, B-3001 Leuven, Belgium
    • Department of Chemical Engineering, Katholieke Universiteit Leuven, W. de Croylaan 46, B-3001 Leuven, Belgium
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Abstract

The rheological behavior of polyamide 11 samples with different initial moisture levels is investigated. More specifically, the time evolution of the linear viscoelastic properties is monitored at a given frequency. The time dependence of these properties is exponential in time, reflecting postcondensation reactions in the samples. The crossover time, at which the storage modulus and loss modulus intersect, can be used as a characteristic timescale for the reaction. This crossover time and the corresponding complex viscosity can be used as fingerprints of the material, reflecting the moisture content in the material. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 97: 666–670, 2005

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