A mathematical model for the diffusion of low-molecular-mass substance into polymer material

被引：0
|
作者：
Aminova, GA [1 ]
Manuiko, GV [1 ]
D'yakonov, GS [1 ]
Sopin, VF [1 ]
机构：
[1] Kazan State Technol Univ, Kazan 420015, Tatarstan, Russia
来源：
VYSOKOMOLEKULYARNYE SOEDINENIYA SERIYA A & SERIYA B | 1998年 / 40卷 / 10期
关键词：
D O I：
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中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
A mathematical model is proposed to explain the diffusion of a low-molecular-mass substance into polymer particles. This model takes into account the variation of the structure, weight, and volume of particles. The expression for the shrinkage velocity of particles during solvent extraction is derived from the mass-balance equation. This excludes the need to preset this value. The advanced model assumes the existence of a mobile interface. Therefore, a difference scheme is constructed taking into account the transition from a variable to a fixed region. Realization of the difference scheme allows one to determine the solvent concentration profile inside a particle at each moment of time, the shrinkage velocity of a particle, and the kinetic characteristics of the solvent extraction process.
引用
收藏
页码：1652 / 1658
页数：7
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