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Gas permeation properties of poly(silamine) membrane
Author(s) -
Kimura Hideo,
Nagasaki Yukio,
Kato Masao,
Okamoto Ayumu,
Moriya Naomi,
Nakayama Ichiro
Publication year - 1997
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/(sici)1099-1581(199709)8:9<529::aid-pat681>3.0.co;2-u
Subject(s) - permeation , materials science , natural rubber , membrane , polymer , glass transition , diffusion , molecule , gaseous diffusion , polymer chemistry , chemical engineering , natural gas , composite material , thermodynamics , fuel cells , organic chemistry , chemistry , biochemistry , physics , engineering
The gas permeation characteristics of poly(silamine) membrane, which consists of alternating 3,3‐dimethyl‐3‐silapentane and N,N′‐diethylethylenediamine units in the main chain, were investigated. Though poly(silamine) shows high flexibility (glass transition temperature of −88°C), the gas permeabilities were much lower than those of other rubbery polymers such as poly(dimethylsiloxane) and natural rubber. The activation energies of diffusion in poly(silamine) were much higher than that of natural rubber. On the basis of these results, we propose a model such that the interaction between the Si atom and gas molecules (O 2 and N 2 ) prevents the free diffusion of the gas molecule in the poly(silamine) membrane. © 1997 John Wiley & Sons, Ltd.