Percolation phenomena in diffusion-controlled polymer matrix systems

被引：1

作者：

徐铜文

何炳林

机构：

[1] Nankai University

[2] Tianjin 300071

[3] University of Science and Technology

[4] State Key Laboratory of Functional Polymer Materials for Adsorption and Separation

[5] Department of Applied Chemistry

[6] China

[7] Institute of Polymer Chemistry

[8] Hefei 230026

来源：

Science in China(Series B) | 1997年 / 06期

关键词：

controlled release; percolation threshold; pore diffusion; matrix diffusion; poly (ethylem--vinyl-alcohol);

D O I：

暂无

中图分类号：

O631 [高分子物理和高分子物理化学];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The controlled release of two kinds of drugs,5-fluorouracil (5-FU) and hydrocortisonum (Hydro.) loaded in poly(ethylene-vinylalcohol) (EVAL) was dealt with,of which 5-FU/EVAL and Hydro /EVAL matrix systems are composed.The results were analyzed using the pseudo-steady-diffusion models coupled with the fundamental concepts of percolation theory.The percolation thresholds for the two systems were calculated,which could indicate the contributions of pore diffusion and matrix diffusion.

引用

页码：624 / 633

页数：10