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http://hdl.handle.net/11375/30043
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DC Field | Value | Language |
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dc.contributor.advisor | Shi, An-Chang | - |
dc.contributor.author | Rehel, Desiree | - |
dc.date.accessioned | 2024-08-14T20:10:10Z | - |
dc.date.available | 2024-08-14T20:10:10Z | - |
dc.date.issued | 2024 | - |
dc.identifier.uri | http://hdl.handle.net/11375/30043 | - |
dc.description.abstract | In this project, the sensitivity of the phase behaviour of AB diblock copolymers to the addition a single C-monomer is investigated using self-consistent mean-field theory. The reference diblock copolymers are composed of the minority A block with N_A = 12 monomers and the majority B block with N_B monomers. The blocks are mutually repulsive and their interaction is characterised by χ_{ij} and acts over range σ_{ij}, where i and j represent the monomer species. When a C-monomer is added to the junction of the diblock copolymers, we observe a notable shift of the phase boundaries to the larger NB and smaller χ_{AB}. The shift to larger NB is due to an increased polymer stretching. When the C-monomers is nearly-neutral, the shift does not strongly depend on the interaction strength. Similarly, the shift is not visibly affected by changing σ_{AC} and σ_{BC}. However, when the the strength of the interaction is selective such that χ_{AC} = χ_{AB} + α and χ_{BC} = χ_{AB} − α, the shift size decreases with increasing α. Conversely, when the selective C-monomer is added to the majority end, the phase boundaries are shifted to the smaller N_B, with the smallest α giving the largest shift. The shifts can be generically understood to be cause by the interplay between the changes in the interfacial tension and polymer stretching due to the C-monomer. These results demonstrate sensitivity of phase behaviour of AB diblock copolymers to the addition of a C-monomer and may provide a useful link between experiment and theory. | en_US |
dc.language.iso | en | en_US |
dc.subject | Diblock Copolymers | en_US |
dc.subject | Self-consistent field theory | en_US |
dc.subject | Self Assembly | en_US |
dc.title | Sensitivity of Block Copolymer Self-Assembly to the Modification of a Single Monomer | en_US |
dc.type | Thesis | en_US |
dc.contributor.department | Physics | en_US |
dc.description.degreetype | Thesis | en_US |
dc.description.degree | Master of Science (MSc) | en_US |
Appears in Collections: | Open Access Dissertations and Theses |
Files in This Item:
File | Description | Size | Format | |
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Rehel_D_A_202408_MSc.pdf | 4.77 MB | Adobe PDF | View/Open |
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