Moisture permeability of a polymer nanocomposite containing unmodified clay |
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Authors: | R D Maksimov S Gaidukov J Zicans J Jansons |
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Institution: | (1) Institute of Polymer Mechanics, University of Latvia, Riga, LV-1006, Latvia;(2) Institute of Polymer Materials, Riga Technical University, Riga, LV-1048, Latvia |
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Abstract: | Results of an investigation into the kinetics of moisture sorption by an unfilled styrene-acrylate copolymer and a nanocomposite
containing unmodified montmorillonite clay are reported. The sorption tests were performed at 25°C and different levels of
the relative humidity of air up to 80%. The moisture diffusivity was calculated using Fick's equation for one-dimensional
diffusion. Data on the influence of montmorillonite concentration on the coefficients of diffusion, solubility, and permeability
are obtained. The experimental values of the permeability coefficient are compared with those calculated by using a model
taking into account the increased path of a diffusing water molecule caused by the shielding effect of plate like filler particles.
Translated from Mekhanika Kompozitnykh Materialov, Vol. 44, No. 5, pp. 723–736, September–October, 2008. |
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Keywords: | styrene-acrylate copolymer unmodified montmorillonite nanocomposite water vapour permeability |
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