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The effect of glass transition on gas permeabilities
Author(s) -
Yasuda H.,
Hirotsu Toshihiro
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.1977.070210109
Subject(s) - arrhenius plot , glass transition , activation energy , thermodynamics , acrylonitrile , gaseous diffusion , permeability (electromagnetism) , fick's laws of diffusion , atmospheric temperature range , materials science , methyl acrylate , diffusion , copolymer , chemistry , polymer chemistry , analytical chemistry (journal) , polymer , organic chemistry , composite material , physics , biochemistry , electrode , membrane
Gas permeabilities of a copolymer of acrylonitrile and methyl acrylate were examined at the temperature range of 25° to 80°C. The change of activation energy of gas permeability constant at the glass transition temperature (65°C) was observed with N 2 , Ar, O 2 , and CO 2 , but no change was observed with He. The observation of the change of slope of the Arrhenius plot of gas permeability is discussed as a function of the diffusion constant ( D ) of a permeant gas at the glass transition temperature ( T g ). The change occurs only if the value of D at T g is smaller than a certain value (i.e., 5 × 10 −8 ), according to the analysis of data appearing in the literature.