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对链状分子体系用微扰理论模型计算了磷酸三丁酯（ＴＢＰ）、稀释剂和水体系的活度系数。共有７种稀释剂：ｎ－Ｃ６Ｈ１４、ｎ－Ｃ７Ｈ１６、ｎ－Ｃ８Ｈ１８、Ｃ６Ｈ６、ｃ－Ｃ６Ｈ１２、ＣＣｌ４和ＣＨＣｌ３。所有组分共含有９种链节：Ｈ２Ｏ、ＣＨ３、ＣＨ２、ＣＨ（苯环）、ＣＨ２（脂环）、ＣＣｌ４、ＣＨＣｌ３、ＣＨ２Ｏ和ＰＯ。从部分ＴＢＰ—稀释剂二元体系的活度系数回归部分链节的参数。用以上的链节参数预测ＴＢＰ、稀释剂和水形成的二元、三元和四元体系的活度系数。预测的平均相对偏差一般不超过１０％。
The activity coefficients of tributyl phosphate (TBP), diluent and water system were calculated for the chain molecular system using the perturbation theory model. There are 7 diluents: n-C6H14, n-C7H16, n-C8H18, C6H6, c-C6H12, CCl4 and CHCl3. All components contain a total of 9 kinds of links: H2O, CH3, CH2, CH (benzene ring), CH2 (alicyclic), CCl4, CHCl3, CH2O and PO. The parameters of some of the links were regressed from the activity coefficients of some TBP-diluent binary systems. Use the above link parameters to predict the activity coefficients of binary, ternary and quaternary systems formed by TBP, diluent and water. The average relative deviation of the forecast is generally not more than 10%.