Microphase transitions of block copolymer/homopolymer under shear flow
arXiv:1506.07983 · doi:10.5488/CMP.18.23801
Abstract
Cell dynamics simulation is used to investigate the phase behavior of block copolymer/homopolymer mixture subjected to a steady shear flow. Phase transitions occur from transverse to parallel and then to perpendicular lamellar structure with an increase of shear rate and this is the result of interaction between the shear flow and the concentration fluctuation. Rheological properties, such as normal stress differences and shear viscosity, are all closely related with the direction of the lamellae. Furthermore, we specifically explore the phase behavior and the order parameter under weak and strong shear of two different initial states, and realize the importance of the thermal history. It is necessary to apply the shear field at the appropriate time if we want to get what we want. These results provide an easy method to create ordered, defect-free materials in experiment and engineering technology through imposing shear flow.
arXiv comment14 pages, 9 figures
References in corpus (8)
- Two-scale competition in phase separation with shear
- Spinodal decomposition of a binary mixture in an uniform shear flow
- Shear Alignment and Instability of Smectic Phases
- Phase-separation of binary fluids in shear flow: a numerical study
- Dynamics of Phase Separation under Shear: A Soluble Model
- Orientational phase transitions in the hexagonal phase of a diblock copolymer melt under shear flow
- Orientations of the lamellar phase of block copolymer melts under oscillatory shear flow
- Influence of confinement on the orientational phase transitions in the lamellar phase of a block copolymer melt under shear flow
Cited by in corpus (4)
- Numerical investigation of local defectiveness control of diblock copolymer patterns
- Cylindrically confined assembly of diblock copolymer under oscillatory shear flow
- Pattern formation mechanisms in sphere-forming diblock copolymer thin films
- Self-assembly behaviour of diblock copolymer-diblock copolymer under oscillating shear field