Reentrant microphase

Typical example of the phase diagrams for the associating diblock copolymer blends of relatively short chains (jia = b = 20). MST (broken line) and SP (solid lines) are shown on the temperature-concentration plane. Points indicated by (LP) are I. ifshit points, while those shown by (e) and (e ) are eutectic points. Existence of a reentrant microphase (M ) is one of the remarkable features of the associating systems. y = A /fc5 = 3. (a)A.Q=l -20, (b) Xp = 1.26,... 

At extremely low temperatures, we observe that the miscibility gap starts to split again at the point E in the center of the concentration axis, and a new homogeneous microphase (shown by MS ) is stabilized in between. Such a low-temperature microphase (called a reentrant microphase) is stabilized simply because the population of block copolymers becomes so large in this low-temperature region that they homogenize the two demixed fluid phases into a single one. 

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See also in sourсe #XX -- [ ]

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