硬脂酸铝/苯凝胶流变行为的研究

Studies on Rheological Behaviours of Aluminum Stearate Benzene Gels

<正> McAllister和Hoffmann等曾导出多组分液体,如溶液的粘度与温度的关系为 In(v/v_0)=InA+ΔG~*/RT (1)式中,v及v_0分别为溶液及溶剂的运动粘度,v=η/ρ及v_0=η_0/ρ_0,η及η_0分别为溶液及溶剂的粘度,ρ及ρ_0分别为溶液及溶剂的密度。ΔG~*被称作粘流活化自由能,即粘流活化Gibbs函数。此式曾成功地应用于胶束溶液,并被称为McAllister方程。本工作研究温度对硬脂酸铝/苯凝胶粘度的影响,试将McAllister方程应用于凝胶体系,并测定凝胶的ΔG~*。

The effect of temperature on the viscosity for aluminum stearate/benzene gels either with or without benzoic acid has been investigated. The experimental results show that the McAllister's equation can be used to describe the relation between the viscosity and temperature for these gels. The viscosity of these gels increase with elevation of the temperature and the activation Gibbs functions of the viscous flow are negative, this behavior is contrary to that of the most liquids.