化学学报 ›› 1991, Vol. 49 ›› Issue (7): 649-655. 上一篇    下一篇

研究论文

液体的粘度与内压

刘国杰;胡英   

  1. 华东化工学院化学系
  • 发布日期:1991-07-15

Viscosity and internal pressure for liquids

LIU GUOJIE;HU YING   

  • Published:1991-07-15

本文以液体粘性流动的Eyring模型为基础, 由热力学方法建立了一个液体粘度与内压间的关系式, 式中v是活化分子落入空穴的频率; α是一个与液体中形成空穴时所吸收的热与所需能量之比有关的参数, 两者都是液体的特性常数。在引入了某些近似式后, 由这个关系式能够推导出Eyring粘度公式, 与其不同的是推导中假定了空穴的大小等于一个分子所占液体的体积。本文还讨论了液体粘性流动的机理和活化能。

关键词: 热力学性质, 公式, 机理, 液体, 活化能, 流变性质, 粘度, 内压力, 粘性流动

Based on Eyring's model of viscous flow, a relation between viscosity and internal pressure for liqs. is established by a thermodn. method. The Eyring's viscosity formula can be derived assuming that the size of a hole equals the vol. occupied by a mol., rather than one-third the vol. of a mol. as considered by Eyring and his collaborators. The mechanism and activated energy for viscous flow of liqs. are discussed in accordance with this result.s

Key words: THERMODYNAMIC PROPERTIES, FORMULA, MECHANISM, LIQUID, ACTIVATION ENERGY, RHEOLOGICAL PROPERTY, VISCOSITY, INTERNAL PRESSURE, VISCOUS FLOW

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