title: Domain patterns in a diblock copolymer-diblock copolymer mixture with oscillatory particles.
abstract: We investigate the orientational order transition of striped patterns in microphase structures of diblock copolymer-diblock copolymer mixtures in the presence of periodic oscillatory particles. Under certain conditions, although the macrophase separation of a system is almost isotropic, microphase separation of one diblock copolymer takes place and becomes anisotropic gradually. By changing the oscillatory frequency and amplitude, the orientational order transition of a striped microphase structure from the state parallel to the oscillatory direction to the state perpendicular to the oscillatory direction is observed. We also find that the order transition occurs when we change the initial composition ratio. Furthermore, we examine the domain size and the orientational order parameter of microstructure in the process of orientational order transition. The results may provide guidance for experimentalists. This model system can also give a simple way to realize orientational order transition of soft materials by changing the oscillatory field.
authors.affiliation: School of Chemistry and Materials Science, Shanxi Normal University, Linfen 041004, China.
authors.forename: Minna
authors.initials: M
authors.lastname: Sun
authors.forename: Jin-jun
authors.initials: JJ
authors.lastname: Zhang
authors.forename: Baofeng
authors.initials: B
authors.lastname: Wang
authors.forename: Hai-shun
authors.initials: HS
authors.lastname: Wu
authors.forename: Junxing
authors.initials: J
authors.lastname: Pan
mesh_terms: D016880:Anisotropy; D003198:Computer Simulation; D015233:Models, Statistical; D008962:Models, Theoretical; D009991:Oscillometry / Q000379:methods*; D010316:Particle Size; D044367:Phase Transition; D010825:Physics / Q000379:methods*; D011108:Polymers / Q000737:chemistry*; D013696:Temperature
chemical_list: D011108:Polymers