miscibility gap
Area within the coexistence curve of an isobaric phase diagram (temperature
vs
composition) or an isothermal phase diagram (pressure
vs
composition).
Note:
A
miscibility
gap is observed at temperatures below an
upper critical solution temperature
(
UCST
) or above the lower
critical solution temperature
(
LCST
). Its location depends on pressure. In the
miscibility
gap, there are at least two phases coexisting.
Source:
PAC, 2004,
76
, 1985
(Definition of terms related to polymer blends, composites, and multiphase polymeric materials (IUPAC Recommendations 2004))
on page 1996