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Gas transport in poly[bis(trifluoroethoxy)phosphazene]
Author(s) -
Hirose Takuji,
Kamiya Yoshinori,
Mizoguchi Keishin
Publication year - 1989
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.1989.070380504
Subject(s) - phosphazene , crystallinity , polymer , solubility , materials science , polymer chemistry , high density polyethylene , polyethylene , sorption , polysulfone , chemical engineering , chemistry , organic chemistry , composite material , adsorption , engineering
The gas transport parameters of 14 gases in poly[bis(trifluoroethoxy)phosphazene] were determined at temperatures ranging from about 12 to 45°C by the time‐lag method. The phosphazene polymer demonstrated a high diffusivity; rather high crystallinity was expected, though. The permeation data determined were between polydimethylsiloxane and low‐density polyethylene. The most interesting characteristic shown over the course of experimentation is that poly[bis(trifluoroethoxy)phosphazene] has significantly high solubility for CO 2 , as compared to other gases. The polar side groups—i.e., the electron‐withdrawing trifluoroethoxy parts—which should contribute specific interaction with CO 2 , were shown to be stronger than their interaction with the polar N 2 O molecule. The sorption behavior is compared with those of other rubbery polymers, while phosphazene polymer characteristics are also discussed.