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
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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DOI：
10.1016/j.polymer.2008.09.059
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发表时间：
2008-11
期刊：
影响因子：
4.6
通讯作者：
Yin Xia;Zhao-Yan Sun;T. Shi;Jizhong Chen;L. An;Yuxi Jia
中科院分区：
文献类型：
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作者：
Yin Xia;Zhao-Yan Sun;T. Shi;Jizhong Chen;L. An;Yuxi Jia
通过在三维（3D）空间中应用自洽场晶格技术，研究了杆端束缚的三臂星形线圈嵌段共聚物熔体的自组装行为。与棒-线圈二嵌段共聚物类似，观察到五种形态，即层状、穿孔层状、螺旋状、圆柱形和球形结构，而相图中形态的分布相对于棒-线圈二嵌段共聚物发生了显着变化。当frod=0.45时，由圆柱体代替有孔薄片；当frod=0.5时，当臂A1和A2具有相等的长度且A3臂的体积分数足够低时，由有孔薄片代替薄片。当臂A1和A2的长度不相等时也进行了模拟。这些结果表明，线圈中的简单分支会引起有趣的微相变。
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 A1and A2had an equal length and the volume fraction of A3arm was low enough. Simulations were also performed when the arms A1and A2had unequal lengths. These results demonstrate that simple branching in the coil induces interesting microphase transitions.