摘要
Free volume theory was applied to the diffusion mechanism of drug through semi crystalline ethylene vinyl acetate (EVA) copolymer. According to free volume theory, drug diffused through semi crystalline EVA via vinyl acetate segments of the copolymer, and the dependence of D (D: diffusion coefficient of drug through EVA) on a (a :vinyl acetate content of copolymer; a <0.5) could be described as ln (D)=A1-A2/a(A1, A 2:constant). This was demonstrated by experimental data from several references.
Free volume theory was applied to the diffusion mechanism of drug through semi-crystalline ethylene-vinyl acetate (EVA) copolymer. According to free volume theory, drug diffused through semi-crystalline EVA via vinyl acetate segments of the copolymer, and the dependence of D ( D:diffusion coefficient of drug through EVA) on a ( a: vinyl acetate content of copolymer; a < 0.5) could be described as ln (D) = A1 = A2/a (A1, A2: constant). This was demonstrated by experimental data from several references.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
2002年第2期242-244,共3页
Acta Polymerica Sinica
基金
国家自然科学基金资助项目 (基金号 5 9673 0 17)
