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Kinetics of slow collapse process: Thermodynamic description of rate constants

机译:慢速坍缩过程的动力学:速率常数的热力学描述

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Insoluble monolayer formed at the air/water interface compressed at a surface pressure above the equilibrium spreading pressure is unstable. In presented paper the classical theory for homogeneous nucleation is modified adding the activation energy term. It allows quantitative thermodynamic interpretation of the slow collapse phase transformation. The collapse of stearic acid Langmuir films has been carried out by systematic measurements of the area loss-time isobaric dependencies at various temperatures and isothermal dependencies at various pressures. Activation energies (activation enthalpies) and activation entropies have been evaluated for the nucleation (E-alpha = 1.32 eV) and the growth (E-beta = 1.55 eV) processes. The experimental data for various pressures are discussed on the basis of the Gibbs energy analysis. (c) 2006 Elsevier B.V. All rights reserved.
机译:在空气/水界面处形成的不溶性单层在高于平衡扩散压力的表面压力下被压缩是不稳定的。在提出的论文中,对均相成核的经典理论进行了修改,增加了活化能项。它可以对慢速塌陷相变进行定量热力学解释。硬脂酸朗缪尔膜的崩解已经通过系统测量在各种温度下的面积损失时间等压依赖性和在各种压力下的等温依赖性来​​进行。已经评估了成核过程(E-alpha = 1.32 eV)和生长过程(E-beta = 1.55 eV)的活化能(活化焓)和活化熵。在吉布斯能量分析的基础上讨论了各种压力的实验数据。 (c)2006 Elsevier B.V.保留所有权利。

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