The intrusion of polydimethylsiloxane (PDMS) top layers in Zirfon(R) (polys
ulfone filled with zirconium oxide) and polyvinylidenefluoride (PVDF) asymm
etric support layers is studied. Parameters such as the porosity of the sup
port, the concentration of the coating solution, the presence of additives
in the support during coating and pre-wetting of the supports are investiga
ted with spectroscopical techniques, thermal analysis and pervaporation. (C
) 1999 Elsevier Science B.V. All rights reserved.