Measurement of Infinite Dilution Activity Coefficient and Application of Modified ASOG Model for Solvent-Polymer Systems

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Bong Goo Choi²  Kazuo Kojima¹  Joong So Choi²  Katsumi Tochigi¹ 

[1] Department of Industrial Chemistry, Nihon University;Department of Chemical Engineering, Kwangwoon University, Institute of New Technology

关键词: Gas Chromatographic Method;    Vapor-Liquid Equilibria;    Activity Coefficient;    Modified ASOG;    Solvent-Polymer Systems;   

DOI  :  10.1252/jcej.29.217

来源: Maruzen Company Ltd

【 摘 要 】

References(26)Cited-By(2)A gas chromatographic method was used in order to measure vapor-liquid equilibria for solvent (1)-polymer (2) systems in which the polymers were polystyrene, poly(a-methyl) styrene and the solvents were benzene, toluene, cyclohexane, methylisobutylketone, ethylacetate, and vinylacetate. The activity coefficients of solvents for solvent (1)-polymer (2) systems were measured at infinite dilution and the modified ASOG (Analytical Solution of Group) model was suggested to describe vapor-liquid equilibria of those systems within a range of temperatures 423.15 K through 498.15 K. The model consists of the original ASOG and the free volume term. An external degree of freedom in the free volume term empirically became to a C1 = α + β/T as a function of temperature. Each term in the modified ASOG model is based on the weight fraction. The external degree of freedom in the model was estimated by experimental data within a range of temperatures. As a result of doing it, the infinite dilution activity coefficients calculated were agreed with the experimental data within an error of 0.1%.

【 授权许可】

Unknown