Multicomponent diffusion of hydrogen-bonding solutes in a polymer

被引：18

作者：

Elabd, YA

Barbari, TA ^{[1
]}

机构：

[1] Univ Maryland, Dept Chem Engn, College Pk, MD 20742 USA

[2] Johns Hopkins Univ, Dept Chem Engn, Baltimore, MD 21218 USA

来源：

AICHE JOURNAL | 2002年 / 48卷 / 08期

关键词：

D O I：

10.1002/aic.690480804

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The diffusion of methyl ethyl ketone (MEK)/1-butanol (BOH) mixtures in polyisobutylene (PIB) was studied using time-resolved FTIR-ATR spectroscopy at varying mixture compositions. Diffusion coefficients and hydrogen-bonding interactions were quantitatively measured using this technique. In the MEK/BOH/PIB system, three species were identified from the infrared spectra, free MEK, an MEK-BOH complex, and a self-associated BOH cluster. The diffusion coefficient for the MEK-BOH complex was less than that for free MEK, but larger than the values determined for the BOH cluster. These results were compared to a numerical solution of a multicomponent transport model that explicitly accounts for solute - solute interactions to determine individual diffusion coefficients for all the species identified. In addition, the MEK/BOH/PIB results were compared to those for an MEK/acetonitrile (ACN) mixture, a nonhydrogen-bonding system, in PIB, to elucidate the differences between interacting and noninteracting systems.

引用

页码：1610 / 1620

页数：11

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