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
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
收藏
页码:624 / 633
页数:10
相关论文
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[1]  
Diffusion on random systems above, below, and at their percolation threshold in two and three dimensions[J] . R. B. Pandey,D. Stauffer,A. Margolina,J. G. Zabolitzky.Journal of Statistical Physics . 1984 (3)