Premium
Evaluation of Permeability Through Permeation Experiments: Isostatic and Quasi‐isostatic Methods Compared
Author(s) -
Gavara Rafael,
Catalá Ramón,
HernándezMuñoz Pilar M.,
Hernández Rubén J.
Publication year - 1996
Publication title -
packaging technology and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.365
H-Index - 50
eISSN - 1099-1522
pISSN - 0894-3214
DOI - 10.1002/(sici)1099-1522(199607)9:4<215::aid-pts366>3.0.co;2-u
Subject(s) - volumetric flow rate , permeation , permeability (electromagnetism) , materials science , hot isostatic pressing , geology , composite material , thermodynamics , membrane , chemistry , microstructure , biochemistry , physics
Isostatic and quasi‐isostatic permeation experiments were used to characterize the permeability of 1‐hexanol through polypropylene films. The quasi‐ isostatic method was considered as an isostatic experiment at the limit a of null purging stream flow rate. Permeability values obtained through the isostatic method showed dependency on the purging stream flow rate. The extrapolated value at zero purging stream flow rate is in agreement with the data obtained via the quasi‐isostatic procedure. Diffusion coefficient values were also determined. The isostatically obtained diffusion coefficients behave similarly to P . However, the value at zero flow rate differs significantly from the value obtained through the quasi‐isostatic method. From these results the validity of permeation experiments for the evaluation of the diffusion coefficient is questioned.