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The influence of chain configuration and, in turn, chain packing on the sorption and transport properties of poly( tert ‐butyl acetylene)
Author(s) -
Morisato A.,
Miranda N. R.,
Freeman B. D.,
Hopfenberg H. B.,
Costa G.,
Grosso A.,
Russo S.
Publication year - 1993
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.1993.070491202
Subject(s) - sorption , gravimetric analysis , propane , acetylene , polymer , polymer chemistry , solubility , materials science , thermal diffusivity , chemical engineering , chemistry , analytical chemistry (journal) , crystallography , organic chemistry , thermodynamics , physics , adsorption , engineering
A series of poly( tert ‐butyl acetylene) (PTBA) polymers was prepared with cis contents, as characterized by 13 C NMR spectroscopy, ranging from 44% to 100%. The sorption and transport properties of propane in this systematically varied series were determined by a sensitive gravimetric sorption technique. As the cis content of the polymer increased, propane solubility and diffusivity decreased markedly and the d ‐spacing, determined by wide angle x‐ray diffraction spectroscopy, decreased monotonically with increasing cis content, suggesting that higher order molecular structure, related explicitly to configurational variations, may strongly influence chain packing in these rigid, glassy materials and, in turn, sorption and transport properties of small molecules in this polymer series. © 1993 John Wiley & Sons, Inc.