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New rheological method to measure diffusion coefficient of volatile liquids: Application to butylmethacrylate in molten polyethylene matrix
Author(s) -
Liotier PierreJacques,
Place Stephanie,
Chalamet Yvan,
Majesté JeanCharles
Publication year - 2010
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.32468
Subject(s) - rheology , diffusion , polymer , boiling point , materials science , evaporation , thermodynamics , polyethylene , polymer chemistry , composite material , physics
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