Phase inversion (chemistry) Phase inversion (chemistry) Phase inversion is a chemical phenomenon exploited in the fabrication of artificial membranes. It is performed by removing the solvent from a liquid-polymer solution, leaving a porous, solid membrane. Phase inversion is a common method to form filtration membranes, which are typically formed using artificial polymers. The method of phase inversion is highly dependent on the type of polymer used and the solvent used to dissolve the polymer. Phase inversion can be carried out through one of four typical methods: The rate at which phase inversion occurs and the characteristics of the resulting membrane are dependent on
A Girl in a Million Worlds", "Courage of Lassie", "Mildred Pierce", "The Spiral Staircase"' and "Brief Encounter", "The Years Between" and "The Dolly Sisters". Sandra Brennan wrote in Allmovie, "feminists beware! This blatantly sexist comedy may definitely raise a few hackles" ; while David Parkinson in the Radio Times called it "an object lesson in how tastes change, this chauvinistic comedy was co-scripted (with producer-husband Sydney) by Muriel Box, who was one of the few female creatives with clout in postwar British cinema. Moreover, it made a star of Joan Greenwood in a role that basically dismisses women as blethering nuisances who should be seen