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Assessing the transport properties of organic penetrants in low-density polyethylene using free volume models
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2007 (English)In: Journal of Polymer Science Part B: Polymer Physics, ISSN 0887-6266, E-ISSN 1099-0488, Vol. 45, no 6, p. 723-734Article in journal (Refereed) Published
Abstract [en]

Three models, two of them relying on free volume-the Cohen-Turnbull-Fujita (CTF) model and the Vrentas-Duda (VD) model, and the third being empirical using an exponential concentration dependence of the diffusivity, were applied to desorption data for a series of alkane penetrants (2,2-dimethylbutane, cyclohexane, n-hexane, n-decane, and n-tetradecane) in low-density polyethylene. The CTF model described the desorption data very well and better than the exponential diffusion law. The VD model with the attractive feature of being based on independently determined parameters was unsuccessful in describing the desorption data. Diffusivity data indicated that the three components outside the crystal core were less accessible to n-tetradecane than to the other penetrants. This indication was further substantiated by solubility data.

Place, publisher, year, edition, pages
2007. Vol. 45, no 6, p. 723-734
Keyword [en]
diffusion, free-volume, polyethylene, theory, polymer-solvent systems, multicomponent diffusion, self-diffusion, coefficients, films, desorption, parameters, liquids, zero
Identifiers
URN: urn:nbn:se:kth:diva-16424DOI: 10.1002/polb.21083ISI: 000244614800011Scopus ID: 2-s2.0-33947592225OAI: oai:DiVA.org:kth-16424DiVA, id: diva2:334466
Note
QC 20100525Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2017-12-12Bibliographically approved

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Gedde, Ulf W.
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Fibre and Polymer Technology
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