ABSORPTION-DESORPTION IN A SPHERE WITH CONSEQUENT CHANGE IN DIMENSION, AND CONSTANT CONCENTRATION ON THE SURFACE

被引：4

作者：

BENGHALEM, A

BOUZON, J

VERGNAUD, JM

机构：

[1] UNIV ST ETIENNE, FAC SCI, MAT & CHEM ENGN LAB, F-42023 ST ETIENNE, FRANCE

[2] UNIV ST ETIENNE, FAC SCI, MAT & CHEM ENGN LAB, F-42023 ST ETIENNE, FRANCE

[3] UNIV ST ETIENNE, FAC SCI, MAT & CHEM ENGN LAB, F-42023 ST ETIENNE, FRANCE

来源：

EUROPEAN POLYMER JOURNAL | 1995年 / 31卷 / 04期

关键词：

D O I：

10.1016/0014-3057(94)00180-4

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Mathematical treatment of diffusion with the second Fick's equation is only feasible when the amount of substance transferred is so low that the change in dimension is negligible. A more general theory of diffusion is established in the case of a sphere by considering the radial diffusion and the subsequent change in dimension, with an infinite coefficient of surface matter transfer. The problem is studied in the case of absorption-desorption histories, by considering various values of the maximum relative volume expansion, this maximum being obtained when the sphere is saturated by the substance.

引用

页码：327 / 333

页数：7

共 15 条

[1]

BROWN RP, 1979, PHYSICAL TESTING RUB

[2]

Crank J., 1976, MATH DIFFUSION

[3] ABSORPTION OF ANILIN BY ETHYLENE-VINYL ACETATE COPOLYMERS AND DESORPTION INTO WATER [J].