Kinetics of phase separation of perfluorinated Nafion ionomer and poly(vinylidene flouride) blends

Jen Chang Yang, Thein Kyu

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17 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)182-186
Number of pages5
JournalMacromolecules
Volume23
Issue number1
Publication statusPublished - Jan 8 1990
Externally publishedYes

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ASJC Scopus subject areas

  • Materials Chemistry

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