The effect of asymmetry of the coil block on self-assembly in ABC coil-rod-coil triblock copolymers
Using the self-consistent field approach, the effect of asymmetry of the coil block on the microphase separation is focused in ABC coil-rod-coil triblock copolymers. For different fractions of the rod block fB, some stable structures are observed, i.e., lamellae, cylinders, gyroid, and core-shell h...
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| Date: | 2017 |
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| Main Authors: | , , , |
| Format: | Article |
| Language: | English |
| Published: |
Інститут фізики конденсованих систем НАН України
2017
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| Series: | Condensed Matter Physics |
| Online Access: | http://dspace.nbuv.gov.ua/handle/123456789/157029 |
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| Journal Title: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Cite this: | The effect of asymmetry of the coil block on self-assembly in ABC coil-rod-coil triblock copolymers / X.-G. Han, H.-H. Meng, Y.-H. Ma, S.-L. Ouyang // Condensed Matter Physics. — 2017. — Т. 20, № 4. — С. 43601: 1–9. — Бібліогр.: 34 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| Summary: | Using the self-consistent field approach, the effect of asymmetry of the coil block on the microphase separation
is focused in ABC coil-rod-coil triblock copolymers. For different fractions of the rod block fB, some stable structures are observed, i.e., lamellae, cylinders, gyroid, and core-shell hexagonal lattice, and the phase diagrams are
constructed. The calculated results show that the effect of the coil block fraction fA is dependent on fB. When
fB = 0.2, the effect of asymmetry of the coil block is similar to that of the ABC flexible triblock copolymers;
When fB = 0.4, the self-assembly of ABC coil-rod-coil triblock copolymers behaves like rod-coil diblock copolymers under some condition. When fB continues to increase, the effect of asymmetry of the coil block reduces.
For fB = 0.4, under the symmetrical and rather asymmetrical conditions, an increase in the interaction parameter between different components leads to different transitions between cylinders and lamellae. The results
indicate some remarkable effect of the chain architecture on self-assembly, and can provide the guidance for
the design and synthesis of copolymer materials. |
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