Assessing the transport properties of organic penetrants in low-density polyethylene using free volume models
2007 (English)In: Journal of Polymer Science Part B: Polymer Physics, ISSN 0887-6266, E-ISSN 1099-0488, Vol. 45, no 6, 723-734 p.Article in journal (Refereed) Published
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, 723-734 p.
diffusion, free-volume, polyethylene, theory, polymer-solvent systems, multicomponent diffusion, self-diffusion, coefficients, films, desorption, parameters, liquids, zero
IdentifiersURN: urn:nbn:se:kth:diva-16424DOI: 10.1002/polb.21083ISI: 000244614800011ScopusID: 2-s2.0-33947592225OAI: oai:DiVA.org:kth-16424DiVA: diva2:334466
QC 201005252010-08-052010-08-05Bibliographically approved