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International Journal of Polymer Science
Volume 2009, Article ID 140682, 6 pages
http://dx.doi.org/10.1155/2009/140682
Research Article

Diffusion Characteristics of Toluene into Natural Rubber/Linear Low Density Polyethylene Blends

Department of Polymer and Textile Engineering, Federal University of Technology, Owerri, P.M.B. 1526 Imo State, Nigeria

Received 24 January 2009; Revised 14 July 2009; Accepted 6 December 2009

Academic Editor: Jan-Chan Huang

Copyright © 2009 Henry C. Obasi et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The sorption and diffusion of toluene through blends of natural rubber (NR) and linear low density polyethylene (LLDPE) of varying compositions were studied at 35, 55, and by conventional weight-gain experiments. The effects of blend ratio on the diffusion, sorption, and permeation coefficients were determined. The sorption data were used to estimate the activation energies of diffusion and permeation, parameters which were found to show a decrease when the amount of NR or LLDPE was increased. The transport of toluene through most of the blends was anomalous, althouh at , the transport of toluene through the 60/40 blend was Fickian and at , pseudo-Fickian. The enthalpy of sorption of toluene obtained is positive and suggests a Henry's type sorption.