Mechanisms of alignment of lamellar-forming block copolymer under shear flow
The potential applications of block copolymer thin films, utilising their self-assembly capabilities, are enhanced when achieving long-range ordering. In this study we explain the experimental alignment of lamellae under shear flow findings [S. Pujari et al. Soft Matter, 2012, 8, 5258] and classify the alignment mechanisms based on shear rate and segregation, uncovering similarities to the systems subjected to electric fields, suggesting a common pathway of lamellae orientations. However, the presence of thin films surfaces introduces distinct features in the lamellae orientation under shear compared to electric fields. Notably, we observe the emergence of a three-dimensional rotation alongside the conventional two-dimensional rotation. Furthermore, a transient regime has been identified within the melting mechanism, which confirms the existence of the checkboard pattern proposed by Schneider et al. [Macromolecules, 2018, 51, 4642]. These findings significantly enhance our understanding of block copolymer alignments and shed light on the intricate interplay between external fields and the lamellar structure.
History
School affiliated with
- School of Mathematics and Physics (Research Outputs)
- College of Health and Science (Research Outputs)
Publication Title
Soft MatterVolume
21Issue
3Pages/Article Number
476-487Publisher
The Royal Society of ChemistryExternal DOI
ISSN
1744-6848eISSN
1744-6848Date Submitted
2025-10-23Date Accepted
2024-12-03Date of First Publication
2024-12-16Date of Final Publication
2025-01-21Open Access Status
- Open Access
Date Document First Uploaded
2025-01-06Will your conference paper be published in proceedings?
- N/A