Inability of a mixture to form a single phase.
  1. Immiscibility may be limited to certain ranges of temperature, pressure, and composition.
  2. Immiscibility depends on the chemical structures, molar-mass distributions, and molecular architectures of the components.
PAC, 2004, 76, 1985. (Definition of terms related to polymer blends, composites, and multiphase polymeric materials (IUPAC Recommendations 2004)) on page 1990 [Terms] [Paper]