Helical Microdomains with Homochirality Trapped in a Gyroid Network from Symmetric AB1CB2D Pentablock Quaterpolymer Melt Studied by Monte Carlo Simulation
Helical Microdomains with Homochirality Trapped in a Gyroid Network from Symmetric AB1CB2D Pentablock Quaterpolymer Melt Studied by Monte Carlo Simulation
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通过蒙特卡罗模拟研究对称 AB1CB2D 五嵌段四元聚合物熔体中捕获的同手性螺旋微域
DOI：
10.1002/mats.202270009
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Yushu Matsushita
中科院分区：
文献类型：
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作者：
Jiro. Suzuki;Atsushi.Takano;Yushu Matsushita
采用Monte-Carlo模拟方法研究了对称AB 1$_1$CB 2$_2$D五嵌段四元共聚物的相行为，其中B1$_1$和B2$_2$为相同的聚合物组分，条件为φA=φD$\varphi _{A}=\varphi _{D$，φB1=φB2$\varphi_{B1}=\varphi _{B2}$，其中φi$\varphi _i$表示组分i$i$的体积分数.在较大的φA（=φD）$\varphi _{A}\，（=\varphi _D）$区域，0.188≤φA≤0.219$0.188 \le \varphi _{A} \le 0.219$，在B基体中观察到四方堆积的A、C和D柱体和依赖于φC$\varphi _C$的分级复杂的片层结构。在较小的φA$\varphi _{A}$区域，0.125≤φA≤0.156$0.125 \le \varphi _{A} \le 0.156$，在圆柱相和片层相之间观察到一个新相，其中C域形成一个三维周期性网络，与Schoen陀螺表面的水平表面包裹在一起，而A和D相保持为具有相同螺旋方向的交替螺旋域，即，具有同手性，并且A和D结构域相互显示四重对称性。因此，虽然对称ABC三元共聚物形成一对螺旋网络，但本发明的四元共聚物代表单个螺旋C网络，其中A和D螺旋很好地拟合螺旋模板的{100}纯手性孔。
Phase behavior of symmetric AB1$_1$CB2$_2$D pentablock quaterpolymers, where B1$_1$ and B2$_2$ are the same polymer component, having the conditions of φA=φD$\varphi _{A}=\varphi _D$ and φB1=φB2$\varphi _{B1}=\varphi _{B2}$, where φi$\varphi _i$ denotes the volume fraction of component i$i$, is investigated by Monte‐Carlo simulation. At the larger φA(=φD)$\varphi _{A}\,(=\varphi _D)$ region, 0.188≤φA≤0.219$0.188 \le \varphi _{A} \le 0.219$, tetragonally packed A, C, and D cylinders in B matrix and hierarchically complex lamellar structures are observed depending on φC$\varphi _C$. At the smaller φA$\varphi _{A}$ region, 0.125≤φA≤0.156$0.125 \le \varphi _{A} \le 0.156$, a new phase is observed in between the cylindrical and lamellar phases, in which the C‐domain forms a three‐dimensionally periodic network wrapped with the level surface of the Schoen's Gyroid surface, while the A and D phases stay as the alternating helical domains with the same helical sense, i.e., having homochirality and A and D domains mutually reveal tetragonal symmetry. Thus, while the symmetric ABC terpolymers form a pair of gyroid networks, but the present quaterpolymers represent a single gyroid C‐network, where the A and D helices are nicely fitted to {100} homochiral holes of the gyroid template.