常见有机物临界黏度估算方法

Estimation of Critical Viscosity for Common Organic Compounds

根据估计临界密度性质的Cailletet-Mathias直线直径定律,提出了黏度性质的直线直径规律,并根据该规律确定物质临界黏度值。通过比较37个物质的已有临界黏度文献数据和估计值(总均误差为3.629%),说明提出的直线直径规律可以准确估计物质的临界黏度值。应用该规律估计了670种常见有机物质的临界黏度值,并验证了Uyehara-Watson关联式对以上临界黏度数据的计算准确性,总均误差为10.354%。在Uyehara-Watson关联式基础上,经过对关联式系数和指数的修正,提出了新的临界黏度估算关联式,计算值的总均误差为4.65%。通过误差范围分析和对不同物质种类的计算误差分析,表明新的关联式计算准确性均好于Uyehara-Watson关联式。

Based on the Cailletet-Mathias linear-diameter law which is used for the estimation of critical density, a linear-diameter law of viscosity was proposed, and critical viscosity of any organic compounds can be estimated by using the proposed law. Comparing the estimated critical viscosity values of 37 substances with their documental data （all over average error is 3.629%） shows that the proposed law can be used to estimate critical viscosity accurately. Then the critical viscosities of 670 common organic compounds were estimated by means of the proposed law. The accuracy of using Uyehara-Watson equation to calculate the critical viscosity was verified, and it was found that its all over average error for above 670 substances is 10.354%. By revising the coefficients and indexes of the Uyehara-Watson equation, a modified Uyehara-Watson equation for critical viscosity estimation with all over average error of 4.65% was proposed. Through the analyses of error distributions of 670 compounds and errors for different kinds of compounds, it shows that the modified equation is more applicable to estimate the critical viscosity than the Uyehara-Watson equation.