nucleation of phase separation

in polymer chemistry
https://doi.org/10.1351/goldbook.NT07272
@[email protected] of @[email protected] formation through the presence of heterogeneities.
Note:
In a @[email protected] region of a phase diagram, @[email protected] is initiated only by nucleation.
Source:
PAC, 2004, 76, 1985. (Definition of terms related to polymer blends, composites, and multiphase polymeric materials (IUPAC Recommendations 2004)) on page 1997 [Terms] [Paper]