On the applicability of the van der Waals potential E=-η/Vm to chain molecule liquids
On the applicability of the van der Waals potential E=-η/Vm to chain molecule liquids
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论范德华势E=-η/Vm对链状分子液体的适用性
DOI：
10.1016/j.polymer.2005.02.039
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发表时间：
2005
期刊：
影响因子：
4.6
通讯作者：
Hidemine Furuya
中科院分区：
文献类型：
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作者：
A. Abe;Zhiping Zhou;Hidemine Furuya
分子间吸引势E=−η/Vm的范德华公式的一种修正形式经常被用来考虑势函数的偏心性质，其中V是体积，η是表示相互作用场强度的平均场参数，m是经验参数，通常是1-2范围内的常数。在本文中，我们试图根据相关的状态方程项，如压力、体积、温度和热压系数来检验该表达式的有效性或局限性。对方程中的参数m和η分别进行了估计。研究了一系列正构烷烃，包括聚乙烯、聚氧乙烯和能够形成液晶的链段二聚体化合物。严格地说，只有在有限的温度和体积范围内才能保证表达式的准确性。发现m和η在LC态有一个有趣的行为。强调了对LCS等各向异性液体进行分析的重要性。
A modified form of the van der Waals expression for the attractive intermolecular potential E=−η/Vmhas often been used to take account of the acentric character of the potential function, where V is the volume, η a mean-field parameter representing the strength of the interaction field, and m an empirical parameter, usually a constant in the range 1–2. In this article, we have attempted to examine the validity or limitation of this expression in terms of the relevant equation of state terms such as pressure, volume, temperature, and thermal pressure coefficient. The parameters m and η in the equation were estimated separately. A series of n-alkanes including polyethylene, polyoxyethylene, and a segmented dimer compound capable of forming a liquid crystal were investigated. Strictly speaking, the accuracy of the expression was found to be guaranteed only in a limited range of temperature and volume. An interesting behavior was found for m and η in the LC state. Importance of the analysis on anisotropic liquids such as LCs is emphasized.
Yuji Sasanuma、Hajime Ohta、Ikuko Touma、Hiroki Matoba、Yugo Hayashi、Akira Kaito：“聚（硫乙烷）和聚（环氧乙烷）的构象特征：吸引力和排斥性高斯效应的溶剂依赖性”大分子。
DOI：
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