Abstract
Inorganic fillers usually depress the perme-ability of most polymers, whereas the opposite isobserved for the so-called superglassy polymers,characterized by very high free volume and per-meability. The higher permeability obtained bydispersing fine particles of hydrophobic silica inPTMSP, PMP and Teflon AF membranes is prof-itable for different purposes [1]. In this work,zeolites of different size have been modified andincluded in Teflon AF 1600. The transport prop-erties of the resulting dense, defect-free mixedmatrix membranes have been determined by gaspermeation experiments.
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