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Effects of cis‐trans‐configurations of the main chains of poly(trimethylsilyl norbornene) on its transport and sorption properties as well as free volume
Author(s) -
Yampolskii Yu. P.,
Finkelshtein E. Sh.,
Makovetskii K. L.,
Bondar V. I.,
Shantarovich V. P.
Publication year - 1996
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/(sici)1097-4628(19961010)62:2<349::aid-app9>3.0.co;2-x
Subject(s) - norbornene , sorption , polymer , trimethylsilyl , metathesis , polymer chemistry , polymerization , solubility , diffusion , microstructure , positron annihilation , materials science , chemistry , thermodynamics , organic chemistry , positron , crystallography , adsorption , physics , nuclear physics , electron
Samples of poly(trimetylsilyl norbornene) having different content of cis configurations of double bonds in the main chains were prepared by ring opening metathesis polymerization in the presence of the catalysts characterized by different stereoselectivity (Re 2 O 7 , RuCI 3 , WCI 6 ). It was shown that the polymer obtained in the presence of the WCI 6 catalysts having the closest content of the cis‐and trans‐configurations is distinguished by the largest gas permeability, diffusion, and solubility coefficients. Determination of the parameters of gas sorption isotherms and estimation of free volume using group contribution and positron annihilation methods allowed to conclude that microstructure of this polymer (cis/trans ratio) affects its free volume and, therfore, its transport and thermodynamic properties. © 1996 John Wiley & Sons, Inc.