Peters V F D, Vis M, García Á González, Wensink H H, Tuinier R
Laboratory of Physical Chemistry, Department of Chemical Engineering and Chemistry & Institute for Complex Molecular Systems, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, Netherlands.
Laboratoire de Chimie, École Normale Supérieure de Lyon, 69364 Lyon CEDEX 07, France.
Phys Rev Lett. 2020 Sep 18;125(12):127803. doi: 10.1103/PhysRevLett.125.127803.
Using a minimal algebraic model for the thermodynamics of binary rod-polymer mixtures, we provide evidence for a quintuple phase equilibrium; an observation that seems to be at odds with the Gibbs phase rule for two-component systems. Our model is based on equations of state for the relevant liquid crystal phases that are in quantitative agreement with computer simulations. We argue that the appearance of a quintuple equilibrium, involving an isotropic fluid, a nematic and smectic liquid crystal, and two solid phases, can be reconciled with a generalized Gibbs phase rule in which the two intrinsic length scales of the athermal colloid-polymer mixture act as additional field variables.
通过使用一个用于二元棒状聚合物混合物热力学的极简代数模型，我们为五重相平衡提供了证据；这一观察结果似乎与两组分系统的吉布斯相律相矛盾。我们的模型基于与计算机模拟在数量上相符的相关液晶相的状态方程。我们认为，涉及各向同性流体、向列相和近晶相液晶以及两个固相的五重平衡的出现，可以与广义吉布斯相律相协调，在广义吉布斯相律中，无热胶体 - 聚合物混合物的两个固有长度尺度充当额外的场变量。
