Capillary-Wave and Chain-Length Effects at Polymer/Polymer Interfaces
Capillary-Wave and Chain-Length Effects at Polymer/Polymer Interfaces
复制标题
聚合物/聚合物界面的毛细管波和链长效应
DOI：
10.1103/physrevlett.80.309
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发表时间：
1997
影响因子：
8.6
通讯作者：
A. Levine
中科院分区：
文献类型：
--
作者：
M. Lacasse;G. Grest;A. Levine
采用连续空间珠-弹簧模型研究了均聚物二元共混体系的相行为和两相界面结构。研究了界面结构与不混相、链长和体系大小的关系。毛细波被观察到，它们的测量允许我们确定表面张力$\gamma$。我们提出了一种更通用的方法来测量界面宽度的第二矩的不同贡献的一阶导数的界面轮廓。直接验证了该方法的预测结果。研究了链长对表面张力的影响。
A continuum-space bead-spring model is used to study the phase behavior of binary blends of homopolymers and the structure of the interface between the two immiscible phases. The structure of the interface is investigated as a function of immiscibility, chain length, and system size. Capillary waves are observed and their measurement allows us to determine the surface tension $\gamma$. We propose a more universal method of measuring the interfacial width in terms of second moments of the different contributions to the first derivative of the interfacial profile. Predictions of this method are directly verified. The effect of chain length on the surface tension is also studied.