Measurements of sorption isotherms and diffusion coefficients by means of a magnetic suspension balance

被引：57

作者：

Mamaliga, I ^{[1
]}

Schabel, W ^{[1
]}

Kind, M ^{[1
]}

机构：

[1] Univ Karlsruhe, Inst Thermal Proc Engn, D-76128 Karlsruhe, Germany

来源：

CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION | 2004年 / 43卷 / 06期

关键词：

magnetic suspension balance; sorption isotherms; diffusion in polymers;

D O I：

10.1016/S0255-2701(03)00077-1

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Sorption equilibrium and diffusion coefficients of solvents in a polymer were determined by use of a magnetic suspension balance (MSB). The binary systems poly(vinyl acetate)-methanol and poly(vinyl acetate)-toluene at 20, 40 and 60degreesC were investigated. The solvent activity was calculated with the Flory-Huggins and UNIFAC-FV model and the diffusion coefficient with the free-volume theory. The measured values are compared with literature data and Flory-Huggins interaction parameters and free-volume parameters were adapted to the measured data. (C) 2003 Published by Elsevier B.V.

引用

页码：753 / 763

页数：11

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