New rheological method to measure diffusion coefficient of volatile liquids: Application to butylmethacrylate in molten polyethylene matrix

Authors

  • Pierre-Jacques Liotier,

    1. Laboratoire de Rhéologie des Matières Plastiques, UMR CNRS 5223/Ingeénierie des Mateériaux Polymeères, Université de Saint Etienne, Saint Etienne Cedex 42023, France
    Search for more papers by this author
  • Stephanie Place,

    1. Laboratoire de Rhéologie des Matières Plastiques, UMR CNRS 5223/Ingeénierie des Mateériaux Polymeères, Université de Saint Etienne, Saint Etienne Cedex 42023, France
    Search for more papers by this author
  • Yvan Chalamet,

    1. Laboratoire de Rhéologie des Matières Plastiques, UMR CNRS 5223/Ingeénierie des Mateériaux Polymeères, Université de Saint Etienne, Saint Etienne Cedex 42023, France
    Search for more papers by this author
  • Jean-Charles Majesté

    Corresponding author
    1. Laboratoire de Rhéologie des Matières Plastiques, UMR CNRS 5223/Ingeénierie des Mateériaux Polymeères, Université de Saint Etienne, Saint Etienne Cedex 42023, France
    • Laboratoire de Rhéologie des Matières Plastiques, UMR CNRS 5223/Ingeénierie des Mateériaux Polymeères, Université de Saint Etienne, Saint Etienne Cedex 42023, France
    Search for more papers by this author

Abstract

A rheological method to assess the diffusion behavior of liquids in molten polymers above their boiling point is presented in this article. The evaporation of the liquid and the evolution of the blends complex modulus are followed by rheological measurement. Identification of the Fick's diffusion coefficient and the rate of evaporation of butylmethacrylate in low density polyethylene is done. The values of the diffusion coefficient are in agreement with those obtained by classical methods. The method developed here appears as complementary to the existent ones. It allows the measurement of diffusion coefficient of liquid/polymer system at high temperatures even for volatiles liquids. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010

Ancillary