Dissipative particle dynamics study on the morphology changes of diblock copolymer lamellar microdomains due to steady shear.
The morphology changes of linear diblock copolymer lamellar microdomains under uniform simple shear are studied via the dissipative particle dynamics technique. The parallel and perpendicular reorientations of the lamellae are observed in the simulations, and two different reorientation mechanisms, under small and large shear rates respectively, are proposed. The parallel-to-perpendicular transition is also observed and the kinetics is discussed. Sinusoidal and chevron instabilities due to the shear are found. After relaxation the peculiar "bidirectionally undulating" instability is obtained.
Liu
Wei
W
State Key Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun 130023, China.
Qian
Hu-Jun
HJ
Lu
Zhong-Yuan
ZY
Li
Ze-Sheng
ZS
Sun
Chia-Chung
CC