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Published on: June 20, 2019
Domain patterns in a diblock copolymer-diblock copolymer mixture with oscillatory particles
Minna Sun1, Jin-jun Zhang, Baofeng Wang
1School of Chemistry and Materials Science, Shanxi Normal University, Linfen 041004, China.
Summary
Researchers observed orientational order transitions in striped microphase structures of diblock copolymer mixtures. Changing oscillatory fields or composition ratios can control pattern orientation in these soft materials.
Area of Science:
- Polymer Science
- Materials Science
- Soft Matter Physics
Background:
- Diblock copolymers form microphase separated structures.
- Controlling the orientation of these microstructures is crucial for material properties.
- External fields can influence self-assembled structures.
Purpose of the Study:
- To investigate the orientational order transition of striped patterns in diblock copolymer-diblock copolymer mixtures.
- To understand the effect of periodic oscillatory particles on microphase separation.
- To explore methods for controlling microstructure orientation.
Main Methods:
- Simulating diblock copolymer-diblock copolymer mixtures with periodic oscillatory particles.
- Analyzing microphase separation and orientational order.
- Varying oscillatory frequency, amplitude, and initial composition ratio.
Main Results:
- Microphase separation becomes anisotropic under certain conditions.
- Orientational order transition of striped structures observed (parallel to perpendicular to oscillatory direction).
- Transition is tunable via oscillatory field parameters and composition ratio.
Conclusions:
- The study demonstrates a method to control microstructure orientation in copolymer systems.
- Periodic oscillatory fields offer a way to realize orientational order transitions in soft materials.
- Findings provide guidance for experimentalists in designing ordered soft materials.
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