Isothermal Phase Diagrams of PVDF / DMAc / water Systems

Isothermal ternary phase diagram of polyvinylidene fluoride (PVDF)/ dimethylacetamide (DMAc)/ water system were prepared. The effect of polyethylene glycol (PEG) inclusion into PVDF was investigated at 30 wt % concentration and at two distinct coagulation bath temperatures, i.e.25 °C and 60°C. Due to increase in system thermodynamic stability, the binodal line shifted to the right side of diagram at higher bath temperature. Whereas, the PEG inclusion resulted the binodal line to shift to the left side of diagram mainly due to PEG weak non-solvent effect.

کلیدواژه ها:

Poly(vinylidene fluoride) ، phase diagrams ، polyethylene glycol