Polymer-solvent-precipitant systems ternary phase diagram

The Ternary Phase Diagram. The ternary phase diagrams of various polymer-solvent-precipitant systems have been determined. The results shown in Figure 11 indicate that the phase diagrams determined for the systems... 

Formation of the hollow-fiber precursor results from the exchange between the solvent and the nonsolvent (coagulant), which induces the precipitation of polymer in the suspension and hence consolidates the ceramic material [8]. This process is known as phase inversion [9], and the basic concept of this process can be explained using the ternary phase diagram of a polymeric system, which involves the polymer, solvent, and nonsolvent, as shown in Figure 11.3. 

These phase diagrams were assessed accurately in preliminary studies, since the phase separation method is based on the precipitation of a shell material from the phase behavior of the ternary system. Actually, the core material served as a poor solvent for the shell polymer. During evaporation of the solvent, a precipitation of the shell polymer on the surface of core droplets occurs. 

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