Figure 1.

Calculated ternary phase diagrams for a) P(VDF‐TrFE)/THF/water and b) P(VDF‐TrFE)/DMF/water. The binodal curves (dark gray) have been fitted against experimentally determined cloud point compositions (purple diamonds). The spinodal curves are indicated in light gray and tie‐lines in black. The colored dots in diagram (a) indicate the initial compositions of dopes THF1 (orange), THF2 (yellow), THF3 (green), and THF4 (blue). The colored dots in diagram (b) indicate the initial composition of dopes DMF1 (green) and DMF2 (blue). The colored curves in diagrams (a,b) (green and blue overlapping) represent mean composition trajectories calculated for processing under conditions with elevated humidity; the dashed curves in diagram (b) represent the same calculation though assuming a higher effective mass transfer coefficient for DMF than water and a low effective humidity.