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
收藏
页码：753 / 763
页数：11
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