Cylindrically confined assembly of diblock copolymer under oscillatory shear flow

GUO Yuqi; ZHANG Jinjun; WANG Baofeng; WU Haishun; SUN Minna; PAN Junxing

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Cylindrically confined assembly of diblock copolymer under oscillatory shear flow

GUO Yuqi #,ZHANG Jinjun *,WANG Baofeng,WU Haishun,SUN Minna,PAN Junxing

School of Chemistry and Materials Science, Shanxi Normal University, Linfen 041004

*Correspondence author

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Funding: Project supported by the National Natural Science Foundation of China （No.Grant No. 21031003）, the Specialized Research Fund for the Doctoral Program of Higher Education of China （No.Grant No. 20121404110004）

Opened online:27 March 2015

Accepted by: none

Citation: GUO Yuqi,ZHANG Jinjun,WANG Baofeng.Cylindrically confined assembly of diblock copolymer under oscillatory shear flow[OL]. [27 March 2015] http://en.paper.edu.cn/en_releasepaper/content/4634399

Manipulating the self-assembly nanostructures with combined different control measures is emerging as a promising route for numerous applications to generate templates and scaffolds for the nanostructured materials. Here, the two different control measures are the cylindrical confinement and oscillatory shear flow. We have studied the phase behavior of diblock copolymer confined in nanopore under oscillatory shear by considering the different $D/L_0$ and different shears via Cell Dynamics Simulation. Under different $D/L_0$ the system occurs different morphology evolution and phase transition with the change of amplitude and frequency. Also, it exists novel morphologies that we expect to obtain. For each $D/L_0$, we have constructed phase diagram of different forms with the change of amplitude and frequency and analyzed carefully the cause why the phase transition occurs. We have found that although the morphologies is different in different $D/L_0$, the cause of the phase transition is roughly the same. These results can guide experimentalist an easy method to create the ordered, defect-free nanostructured materials through the combined control measures of the cylindrical confinement and oscillatory shear flow.

Keywords:self-assembly; diblock copolymer; confinement; oscillatory shear flow

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