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Effect of water on permeation, diffusion, and solution of gases in cellophane
Author(s) -
Kamiya Yoshinori,
Takahashi Fumio
Publication year - 1977
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1977.070210720
Subject(s) - cellophane , permeation , relative humidity , solubility , thermal diffusivity , swelling , humidity , permeability (electromagnetism) , diffusion , materials science , gaseous diffusion , chemical engineering , thermodynamics , chemistry , composite material , polymer chemistry , analytical chemistry (journal) , membrane , chromatography , organic chemistry , biochemistry , physics , electrode , engineering
The laminate method for studying the permeability and diffusivity of moistened cellophane to gases is described and the humidity dependence of the transport parameters for H 2 , He, and Ne is presented. In the relative humidity region of about 0% to 60%, a small increase in the permeability was observed, which is caused by a comparatively small increase in the diffusivity owing to the plasticizing effect of sorbed water and a decrease in the solubility. On the other hand, an extremely large increase in the permeability observed in the relative humidity region above 60% is mainly based on the diffusion coefficient of gas enhanced by the swelling effect of sorbed water. The presence of a minimum in the solubility–relative humidity curves has been confirmed and is discussed.