Tm. Aminabhavi et Rs. Munnolli, MOLECULAR-TRANSPORT CHARACTERISTICS OF A CHLOROSULFONATED POLYETHYLENE GEOMEMBRANE IN THE PRESENCE OF AROMATIC ESTERS, Journal of chemical technology and biotechnology, 63(1), 1995, pp. 69-77
Results of a study on sorption and diffusion of chlorosulfonated polye
thylene geomembrane with methyl benzoate, ethyl benzoate, methyl salic
ylate, iso-butyl salicylate, phenyl acetate, and diethyl phthalate in
the temperature range 25-60 degrees C are presented. A gravimetric sor
ption method is used to calculate the diffusion and permeation coeffic
ients from the Fickian relationship. The diffusion results are depende
nt on penetrant-membrane interactions, temperature, and on penetrant c
oncentration. The values of diffusion coefficients range from 0.02 x 1
0(-7) cm(2) s(-1) for diethyl phthalate at 25 degrees C to 1.81 x 10(-
7) cm(2) s(-1) for ethyl benzoate at 60 degrees C. The activation ener
gies for diffusion range from 21 to 50 kJ mol(-1). The values of heat
of sorption ranged between 2.2 and 6.4 kJ mol(-1). Sorption results ar
e also analyzed using a first-order sorption kinetic equation. Experim
ental results and calculated parameters are used to discuss the transp
ort behavior. None of the esters used have shown any chemical attack t
oward the geomembrane.