Citation: Yan-Yan Wang, Qing-Liang Song, Lin-Li He. Liquid-crystal Assembly of Semiflexible-coil/Homopolymer Blends: a Dissipative Particle Dynamics Study[J]. Chinese Journal of Polymer Science, ;2018, 36(10): 1200-1206. doi: 10.1007/s10118-018-2122-y shu

Liquid-crystal Assembly of Semiflexible-coil/Homopolymer Blends: a Dissipative Particle Dynamics Study

Department of Physics, Wenzhou University, Wenzhou 325035, China

Corresponding author: Lin-Li He, linlihe@wzu.edu.cn
Received Date: 28 December 2017
Revised Date: 5 February 2018
Accepted Date: 5 February 2018
Available Online: 30 March 2018

The liquid-crystal assembly of semiflexible-coil diblock copolymers with coil or semiflexible homopolymers is studied by dissipative particle dynamics simulation. Phase diagrams of the blends and orientation ordering parameters among semiflexible blocks are constructed as a function of chain stiffness and homopolymer volume fraction. For semiflexible-coil/coil blends with varying stiffness of semiflexible blocks, we display the rich phase behaviors of the system transited from coil-coil/coil to rod-coil/coil blends. The disorder-lamellae or lamellae-liquid crystalline transition and " dry brush” phenomenon induced by coil homopolymers are observed. For semiflexible-coil/semiflexible blends, adding semiflexible homopolymers also leads to a disorder-order transition and even a transition between monolayer and bilayer smectic-A phase. The results demonstrate that blending homopolymers into semiflexible copolymers can induce liquid-crystal assembly and even improve the orientation ordering of semiflexible blocks effectively.
- Liquid-crystal assembly,
- Semiflexible-coil,
- Homopolymers,
- Orientation
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