segregation

in polymers
https://doi.org/10.1351/goldbook.S05545
The rejection of a fraction of macromolecules, or of impurities, or both, from growing crystals. The rejected macromolecules are usually those of insufficient @R05271@, or differing in @C01282@ or configuration (e.g. branching, @T06244@, etc.).
Source:
Purple Book, 1st ed., p. 85 [Terms] [Book]