Title
EPDM as a selective membrane material in pervaporation
Author
Meuleman, E.E.B.
Willemsen, J.H.A.
Mulder, M.H.V.
Strathmann, H.
Publication year
2001
Abstract
Various types of ethylene-propylene-diene terpolymers (EPDM) and crosslinking procedures have been investigated with pervaporation, vapor sorption, liquid sorption and gas permeation experiments. The EPDM parameters that have been changed are ethylene content, molecular weight, choice of third monomer, type of branching and various crosslinking procedures. The permeability coefficients were determined from pervaporation experiments and were about 40,000 Barrer for toluene and 700 Barrer for water. However, from vapor sorption measurements, a value of 22,000 Barrer for toluene was obtained which is somewhat lower. It should be realized that these data can only be compared qualitatively; the permeabilities obtained from sorption isotherms are derived data while in case of the pervaporation experiments it is experimentally measured. There is an indication that toluene behaves independently from water but the presence of toluene does influence the water flux during pervaporation. Gas permeation experiments resulted in permeabilities for CO2, O2 and N2 of 120, 24 and 11 Barrer, respectively. No clear differences were found for both EPDM-variation and different crosslinking procedures. © 2001 Published by Elsevier Science B.V.
Subject
Crosslinking
EPDM
Thermodynamic interaction
Toluene/water
Carbon dioxide
Ethylene
Isotherms
Molecular weight
Monomers
Pervaporation
Sorption
Terpolymers
Polymeric membranes
Ethylene derivative
Monomer
Nitrogen
Oxygen
Diffusion coefficient
Gas permeability
Water permeability
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TNO identifier
236141
Publisher
Elsevier, Amsterdam
ISSN
0376-7388
Source
Journal of Membrane Science, 188 (2), 235-249
Document type
article