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Nanostructures and phase diagrams of ABC star triblock copolymers in pore geometries
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10.1063/1.3697764
/content/aip/journal/jcp/136/12/10.1063/1.3697764
http://aip.metastore.ingenta.com/content/aip/journal/jcp/136/12/10.1063/1.3697764
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Nanostructures and phase diagram of ABC star triblock copolymers in bulk. The interaction parameters are selected to be symmetric, i.e., χ AB N = χ BC N = χ AC N = 32. The red, green, and blue colors represent the A-block, B-block, and C-block rich domains, respectively. (a) Several typical nanostructure with the designations and periods in x and y directions list below. (b) The triangular phase diagram. The red dash line represents the isopleths of AC boundary.

Image of FIG. 2.
FIG. 2.

Structures of ABC star triblock copolymers confined in a pore geometry with small diameter, d = 9.2 R g . The red, green, and blue colors represent the A-block, B-block, and C-block rich domains, respectively. The phase symbols and designations are also shown below the corresponding structures, respectively.

Image of FIG. 3.
FIG. 3.

Triangular phase diagrams of ABC star triblock copolymers confined in a pore geometry with small diameter, d = 9.2 R g , arranged as the volume fractions. All the phase denotations are the same as those in Figure 2. The phase with symbol and designation, whose free energy is very close, is list near the phase diagram where the phase point is also labeled. The red dashed line is the isopleths of AC boundary.

Image of FIG. 4.
FIG. 4.

Typical examples of order-order phase transitions with volume fraction of A block in the pores with small diameters, d = 9.2 R g , when f C = 0.4. The order-order transition points are denoted as OOT, and the nanostructures and the symbols are also inserted in the corresponding positions.(a). The free energies as functions of volume fraction. We subtract a linear function from the scaled free energies in order to highlight where the curve cross, and plot ΔF/nk B T = F min/nk B T − [7.05(f C − 0.17) + 8.23]. (b). The phase stability regions as function of volume fraction.

Image of FIG. 5.
FIG. 5.

Structures of ABC star triblock copolymers confined in a pore geometry with large diameter, d = 20 R g The red, green, and blue colors represent the A-block, B-block, and C-block rich domains, respectively. The phase symbols and designations are also shown below the corresponding structures, respectively.

Image of FIG. 6.
FIG. 6.

Triangular phase diagrams and phase transitions of ABC star triblock copolymers in a pore geometry with large diameter, d = 20 R g , arranged as the volume fractions. All the phase denotations are the same as those in Figure 5. (a). Triangular phase diagram with the phase symbols and designations, whose free energy is very close to one phase point, is also shown. (b) The free energy as function of volume fraction of A-block blocks, when f C = 0.4. The nanostructures are also inserted in the corresponding positions.

Image of FIG. 7.
FIG. 7.

Refined triangular phase diagrams and phase transitions of ABC star triblock copolymers in a pore with large diameter, d = 20 R g , arranged as the volume fractions. All the phase denotations are the same as those in Figure 5. The order-order transition points are denoted as OOT, while the order-disorder transition is denoted as ODT. The nanostructures are also inserted in the corresponding positions. (a) The refined triangular phase diagram for the zone labeled as blue line in Figure 6. (b) The order-order and order-disorder phase transitions with volume fractions of C blocks, when f A = f B . We subtract a linear function from the scaled free energies in order to highlight where the curves cross, and plot ΔF/nk B T = F min/nk B T − [18.31 − 15.63 f C ].

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/content/aip/journal/jcp/136/12/10.1063/1.3697764
2012-03-29
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Nanostructures and phase diagrams of ABC star triblock copolymers in pore geometries
http://aip.metastore.ingenta.com/content/aip/journal/jcp/136/12/10.1063/1.3697764
10.1063/1.3697764
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