Zablotskiy Sergey V, Martemyanova Julia A, Ivanov Viktor A, Paul Wolfgang
Faculty of Physics, Moscow State University, Moscow 119991, Russia.
Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, Halle (Saale) 06099, Germany.
J Chem Phys. 2016 Jun 28;144(24):244903. doi: 10.1063/1.4946035.
A single copolymer chain consisting of multiple flexible (F) and semiflexible (S) blocks has been studied using a continuum bead-spring model by Stochastic Approximation Monte Carlo simulations, which determine the density of states of the model. The only difference between F and S blocks is the intramolecular bending potential, all non-bonded interactions are equal. The state diagrams for this class of models display multiple nematic phases in the collapsed state, characterized through a demixing of the blocks of different stiffness and orientational ordering of the stiff blocks. We observe dumbbell-like morphologies, lamellar phases, and for the larger block lengths also Saturn-like structures with a core of flexible segments and the stiff segments forming a ring around the core.
通过随机近似蒙特卡罗模拟，利用连续珠簧模型研究了由多个柔性（F）和半柔性（S）嵌段组成的单一共聚物链，该模拟确定了模型的态密度。F和S嵌段之间的唯一区别是分子内弯曲势，所有非键相互作用均相等。这类模型的相图在塌缩状态下显示出多个向列相，其特征是不同刚度的嵌段发生相分离以及硬嵌段的取向有序化。我们观察到哑铃状形态、层状相，对于较大的嵌段长度，还观察到类似土星的结构，其核心为柔性链段，硬链段围绕核心形成一个环。
