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Response behavior of diblock copolymer brushes in explicit solvent
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10.1063/1.4757860
/content/aip/journal/jcp/137/15/10.1063/1.4757860
http://aip.metastore.ingenta.com/content/aip/journal/jcp/137/15/10.1063/1.4757860
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Schematic illustration of solvent response of diblock copolymer brushes with different B block length. The length of A block is fixed. Red lines: A block. Blue lines: B block. A likes solvent, while B does not. The illustration shows all possible morphology of copolymer brushes immersed in explicit solvent: (a) mixed; (b) collapsed; (c) partial-exposed; and (d) exposed.

Image of FIG. 2.
FIG. 2.

Density profiles of solvated copolymer brushes with ρg = 0.1, ρs = 0.8, NA = 50, and NS = 10 at different lengths of B block: (a) NB = 2; (b) NB = 6; (c) NB = 8; (d) NB = 20; (a–d) show the corresponding microstructure previously illustrated in Figure 1. The density profile of B block is enlarged in the inset of (a) to present the mixed structure more clearly.

Image of FIG. 3.
FIG. 3.

Surface free energy (ΩS) versus B block length (NB) with ρg = 0.1, ρs = 0.8, NA = 50, and NS = 10. All the possible morphology (diamond: mixed, rectangle: collapsed, triangle: partial-exposed, cross: exposed) has been marked in the excess free energy diagram. The collapsed-partial-exposed structure phase transition happens at NB = 6. The intersection between the collapsed-partial-exposed structure has a discontinuity of the slope, which indicates the first-order phase transition. (The dotted lines are used to connect different structures.)

Image of FIG. 4.
FIG. 4.

Surface free energy (ΩS) versus B block length (NB) at lower grafting density ρg = 0.05. All the other parameters are the same with Fig. 3 except ρg = 0.05. NB = 12 is considered as the transition chain length.

Image of FIG. 5.
FIG. 5.

Surface free energy (ΩS) versus B block length (NB) at shorter bottom block length NA = 30. All the other parameters are the same with Fig. 4 except NA = 30. NB = 22 is considered as the transition chain length.

Image of FIG. 6.
FIG. 6.

Surface free energy (ΩS) versus B block length (NB) at smaller solvent NS = 1. All the other parameters are the same with Fig. 3 except NS = 1.

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/content/aip/journal/jcp/137/15/10.1063/1.4757860
2012-10-18
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Response behavior of diblock copolymer brushes in explicit solvent
http://aip.metastore.ingenta.com/content/aip/journal/jcp/137/15/10.1063/1.4757860
10.1063/1.4757860
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