| 摘要 |
<p>Semipermeable porous membranes having an average pore diameter in the range 0.01-3 mu m, and porosity in the range 30%-90%, based on semi-crystalline fluoropolymers and the respective preparation process, wherein the semi-crystalline fluoropolymers comprise: (a) from 10 to 70% by moles of ethylene, (b) from 30 to 90% by moles of a fluorinated monomer selected from tetrafluoroethylene, chlorotrifluoroethylene, or mixtures thereof, (c) from 0.1 to 30% by moles, with respect to the total amount of monomers (a) and (b), of a hydrogenated monomer of formula: CH2=CH-(CH2)n-R1 wherein R1 = -OR2, or -(O)tCO(O)pR2 wherein t and p are integers equal to 0.1 and R2 is a linear or branched C1-C20 alkyl, or a cycloalkyl, optionally containing heteroatoms and/or chlorine atoms, preferably heteroatoms are O or N; R2 can optionally contain one or more functional groups, preferably selected from OH, COOH, epoxy, ester and ether group; R2 can optionally contain double bonds, or it can be H; n is an integer in the range 0-10.</p> |
