Dissipative Particle Dynamics Study on Morphology Changes of Cyclic Diblock Copolymer Microphase Under Shear

Abstract

Abstract: The morphology changes of cyclic diblock polymer microphases under simple shear were studied via DPD technique. For LAM, parallel reorientation and parallel-perpendicular orientation transition phenomena were reproduced. Moreover, the undulation instability was observed. For PL, PL-HEX transition occurs under a strong shear. For HEX, parallel reorientation was identified. A two stage reorientation mechanism involving break-up and phase reformation was proposed to describe the reorientation process for both LAM and HEX, and the PL-HEX transition. For BCC phase, shear-induced melting was found.

Key words: Shear, Cyclic block copolymer, Microphase separation, Reorientation, Dissipative particle dynamics

CLC Number:

O641

TrendMD:

LIU Wei, QIAN Hu-Jun, LÜ Zhong-Y. Dissipative Particle Dynamics Study on Morphology Changes of Cyclic Diblock Copolymer Microphase Under Shear[J]. Chem. J. Chinese Universities, doi: .

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Dissipative Particle Dynamics Study on Morphology Changes of Cyclic Diblock Copolymer Microphase Under Shear

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