Self-assembly of rod-terminally tethered three-armed star-shaped coil block copolymer: Investigation of the presence of the branching in the coil to the self-assembled behavior |
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| Authors: | Yingdong Xia Tongfei Shi Lijia An Yuxi Jia |
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| Affiliation: | a State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
b School of Materials Science and Engineering, Shandong University, Jinan 250061, China |
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| Abstract: | Self-assembled behavior of rod-terminally tethered three-armed star-shaped coil block copolymer melts was studied by applying self-consistent-field lattice techniques in three-dimensional (3D) space. Similar to rod-coil diblock copolymers, five morphologies were observed, i.e., lamellar, perforated lamellar, gyroidlike, cylindrical and sphericallike structures, while the distribution of the morphologies in the phase diagram was dramatically changed with respect to that of rod-coil diblock copolymers. The perforated lamella was replaced by the cylinder when frod = 0.45, and the lamella was replaced by the perforated lamella when frod = 0.5 when the arms A1 and A2 had an equal length and the volume fraction of A3 arm was low enough. Simulations were also performed when the arms A1 and A2 had unequal lengths. These results demonstrate that simple branching in the coil induces interesting microphase transitions. |
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| Keywords: | Self-consistent-field lattice technique Microphase transition Rod-terminally tethered three-armed star-shaped coil block copolymer |
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