YANG Yunsong, PENG Hongyun, QI Guorong, YANG Shilin. DIFFUSION MECHANISM OF DRUG THROUGH SEMI-CRYSTALLINE ETHYLENE-VINYL ACETATE COPOLYMER:FREE VOLUME THEORY[J]. Acta Polymerica Sinica, 2002,(2):242-244.
YANG Yunsong, PENG Hongyun, QI Guorong, YANG Shilin. DIFFUSION MECHANISM OF DRUG THROUGH SEMI-CRYSTALLINE ETHYLENE-VINYL ACETATE COPOLYMER:FREE VOLUME THEORY[J]. Acta Polymerica Sinica, 2002,(2):242-244.DOI:
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.