UNIVERSAL BEHAVIOR OF COMPRESSED LIQUIDS
UNIVERSAL BEHAVIOR OF COMPRESSED LIQUIDS
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DOI：
10.1021/j100070a001
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发表时间：
1994-05
期刊：
影响因子：
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通讯作者：
V. Baonza;M. Alonso;J. Delgado
中科院分区：
文献类型：
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作者：
V. Baonza;M. Alonso;J. Delgado
本文根据新近提出的等温状态方程，讨论了液体压缩数据的普遍温压叠加原理。概述了两种治疗的等效性。本文介绍了准调幅曲线与等温体积模量（S）的零压力值（Bo）和压力系数（Si）之间的新关系。由我们的处理直接得到的B值与某些有机液体和水在正常液体范围内的实验值符合得很好，并证实了对于大多数液体，kj= 5~* 的等温线可以用指数接近0.85的压力的幂反比定律来描述。虽然对液态的理论认识不断提高，在高压下发生的大多数现象还没有得到理论上的支持。近年来，人们发现了液体高压行为中的一些反常现象。1· 2目前，现有的理论仅成功地解释了其中的一小部分反常现象，2而且在实际应用中，液体的大多数性质仍用唯象表达式来描述，例如可压缩性。本文作者最近提出了一个等温状态方程3· 4，其基础是假设等温压缩系数kt服从下列形式的幂律：
A universal temperature-pressure superposition principle found for compression data of liquids is discussed in terms of a recently suggested isothermal equation of state. The equivalence of both treatments is outlined. New relationships relating a pseudospinodal curve with the zero-pressure value (Bo) and the pressure coefficient (Si) of the isothermal bulk modulus (S) are introduced. Values of B\directly obtained from our treatment agree well with experimental values foundfor some organic liquids and water in the normal liquid range and corroborate that the isotherms of kj= 5~* can be described for most liquids by an inverse power law of the pressure with exponent close to 0.85.Although the theoretical understanding of the liquid state is constantly improved, most phenomena occurring at high pressure have not yet receivedtheoretical support. In recent years, some regularities in the high-pressure behavior of liquids have been found. 1· 2 At present, current theories have successfully explained only a few of these regularities, 2 and for practical purposes most properties of liquids are still described by phenomenological expressions, for example, the compressibility. The present authors have recently proposed an isothermal equation of state3· 4 based on the assumption that the isothermal compressibility kt follows a power law of the form