| 摘要 |
POLYPHOSPHAZENE FLUID SEPARATION MEMBRANES Polyphosphazenes are disclosed as fluid separation membranes, Such polyphosphazenes represent a composition of matter having a repeating structural unit of the formula: where Y and Y' can be the same or different and selected from oxygen, nitrogen or sulfur and where R and R' can be the same or different and selected from substituted alkyl, aryl, and substituted aryl, alkyl, and n is an integer of from about 100 to about 70,000. Fluid separation membranes comprised of polyphosphazenes having halogenated side groups are disclosed as exhibiting effective preferential selectivity and permeabilities for polar fluids relative to non-polar fluids contained in feedstream mixtures. The polyphosphazene are in general rubbery polymers having attractive fluids transport properties and improved thermal and chemical stability, Processes utilizing the phosphazene membranes for separating fluids from fluid mixtures are also disclosed. |
