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Predicting particle transport through an aging polymer using vacancy diffusion
Aaron W. Thornton,Anita J. Hill,Kate M. Nairn,James M. Hill 한국물리학회 2008 Current Applied Physics Vol.8 No.3,4
Understanding the process of particle transport is important for various applications such as separation, storage and blockage ofselected particles within a polymer. The diusivity of particles has been related to the fractional free volumefwithin a sample by theexpressionD(f)=A exp(. B/f A and B.Polymers are known to undergo physical aging such that the free volumedistribution changes over time towards an equilibrium. This phenomenon has been well explained by the vacancy diusion model estab-lished by Curro et al. [J.G. Curro, R.R. Lagasse, R. Simha, Macromolecules 15 (1982) 1621]. Using both the diusion expression and thevacancy diusion model, this paper models particle transport in aging, unaged and aged polymer samples.