Interplay between self-assembly and phase separation in a polymer-complex model
Interplay between self-assembly and phase separation in a polymer-complex model
复制标题
聚合物复合物模型中自组装和相分离之间的相互作用
DOI：
10.1103/physreve.108.064501
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发表时间：
2023
影响因子：
2.4
通讯作者：
Jacobs, William M.
中科院分区：
文献类型：
--
作者：
Li, Tianhao;Rogers, W. Benjamin;Jacobs, William M.
我们提出了一个预测相分离与齐聚竞争的聚合物溶液相行为的理论模型。具体地说，我们考虑了这样的场景，即将高聚物链组装成化学计量复合体，防止链通过吸引人的聚合物-聚合物相互作用进行相分离。将统计缔合流体理论与自组装的两态描述相结合，我们发现该模型表现出丰富的相行为，包括重入，并且我们展示了如何图形化地得到系统特定的相图。重要的是，我们讨论了为什么这些相图可以与具有较低临界溶液温度的聚合物溶液的相图相似，但又与之定性地不同。
We present a theoretical model for predicting the phase behavior of polymer solutions in which phase separation competes with oligomerization. Specifically, we consider scenarios in which the assembly of polymer chains into stoichiometric complexes prevents the chains from phase-separating via attractive polymer–polymer interactions. Combining statistical associating fluid theory with a two-state description of self-assembly, we find that this model exhibits rich phase behavior, including reentrance, and we show how system-specific phase diagrams can be derived graphically. Importantly, we discuss why these phase diagrams can resemble—and yet are qualitatively distinct from—phase diagrams of polymer solutions with lower critical solution temperatures.