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Hydrodynamic interactions in ordering process of two-dimensional quenched block copolymers
1Division of Materials Science, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
Summary
Hydrodynamic coarsening speeds up lamellar phase evolution in 2D diblock copolymers, unlike hexagonal phase formation. This indicates flow coupling significantly impacts domain coarsening dynamics.
Area of Science:
- Polymer Science
- Materials Science
- Soft Matter Physics
Background:
- Diblock copolymers exhibit microphase separation into ordered structures.
- Understanding domain coarsening dynamics is crucial for material properties.
- Hydrodynamic effects can influence self-assembly processes.
Purpose of the Study:
- To investigate the impact of hydrodynamic coarsening on microphase separation in 2D diblock copolymers.
- To compare the coarsening behavior of symmetric and asymmetric block copolymers.
- To analyze the influence of velocity field coupling on domain evolution.
Main Methods:
- Numerical simulations were employed to model the system.
- The study focused on two-dimensional diblock copolymer systems.
- Analysis involved comparing results for symmetric and asymmetric copolymers.
Main Results:
- Hydrodynamic flow was found to be less effective in enhancing domain coarsening for the hexagonal phase.
- The lamellar phase exhibited faster late-time evolution due to hydrodynamic effects.
- A different power-law scaling was observed for the lamellar phase with velocity field coupling.
Conclusions:
- Hydrodynamic coupling significantly influences the coarsening dynamics of microphase separation in diblock copolymers.
- The distinct behaviors of hexagonal and lamellar phases highlight the importance of morphology-dependent flow effects.
- These findings contribute to understanding the self-assembly and property tuning of block copolymer materials.