Liquid-liquid phase separation was observed in the blends of Nafion and poly(vinylidene fluoride) (PVDF) above the crystal melting temperature of PVDF crystals. The kinetics of thermally induced phase separation in Nafion/PVDF blends was investigated by means of time-resolved small-angle light scattering. A temperature-composition phase diagram was established on the basis of cloud point measurements. The phase behavior is a lower critical solution temperature (LCST) type and reversible in character. Temperature-jump (T-jump) experiments were undertaken from room temperature to 220 and 240°C. Phase separation was dominated by the late stages of spinodal decomposition. The time evolution of scattering curves was analyzed in the context of nonlinear theories and dynamic scaling laws.
|Number of pages||5|
|Publication status||Published - Jan 8 1990|
ASJC Scopus subject areas
- Materials Chemistry