Residual Degassing and Use of Stripping Agents

The equilibrium concentration can be reflected in polymer solutions using the Flory Huggins solution theory 

Vp0) Volumetric concentration of the polymer X Reciprocal action parameter 

The so-called Flory Huggins diagrams show the vaporization pressure p in the equilibrium point GG after an indefinite time for a specified solvent concentration in the polymer at a specific temperature T (see Fig. 10.4). In these diagrams, the equilibrium concentration GG is often applied logarithmically first with respect to the vaporization pressure p, then for a constant temperature T. 

As the temperature T rises, the equilibrium concentration GG decreases, while the vaporization pressure p remains constant. Using these curves, it is possible to estimate whether and at which residual content point degassing can take place. 

Local cooling of the polymer melt by the addition of water can be determined using the enthalpy of vaporization as follows  

---