论文标题

违反吉布斯相规:胶合聚合物混合物中熵驱动的五重杆点的证据

Defying the Gibbs Phase Rule: Evidence for an Entropy-Driven Quintuple Point in Colloid-Polymer Mixtures

论文作者

Peters, V. F. D., Vis, M., García, Á. González, Wensink, H. H., Tuinier, R.

论文摘要

使用最小的代数模型来用于二元杆 - 聚合物混合物的热力学,我们为五五倍相平衡提供了证据。这一观察结果似乎与两个组件系统的Gibbs相规则不一致。我们的模型基于与计算机模拟量化一致的相关液晶阶段的状态方程。我们认为,涉及各向同性流体的五重能平衡的外观,列列和近晶液晶体以及两个固体相,可以与广义的吉布斯相规则进行调和,其中两个固有长度的长度尺度在其中,辅助胶体 - 聚合物混合物的两个固有长度尺度可作为附加的磁场变量。

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.

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