Gas-transport properties of epoxidated metathesis polynorbornenes

The effect of postpolymerization epoxidation of metathesis polynorbornenes on their gas-transport behavior is studied. For two polymers, unsubstituted polynorbornene and poly(trimethylsilylnorbornene), postpolymerization modification via double bonds is implemented by epoxidation under the action of...

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Bibliographic Details
Published in:Polymer science. Series B 2017-09, Vol.59 (5), p.560-569
Main Authors: Belov, N. A., Gringolts, M. L., Morontsev, A. A., Starannikova, L. E., Yampolskii, Yu. P., Finkelstein, E. Sh
Format: Article
Language:English
Subjects:
Carbon dioxide
Chemical bonds
Chemistry
Chemistry and Materials Science
Coefficients
Decomposition reactions
Epoxidation
Metathesis
Modification of Polymers
Permeability
Polymer Sciences
Polymers
Polynorbornene
Quadrupoles
Solubility
Transport properties
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Summary:The effect of postpolymerization epoxidation of metathesis polynorbornenes on their gas-transport behavior is studied. For two polymers, unsubstituted polynorbornene and poly(trimethylsilylnorbornene), postpolymerization modification via double bonds is implemented by epoxidation under the action of m -chloroperbenzoic acid to high conversions (95–100%). For initial polymers and their epoxidation products, the permeability and diffusion coefficients are measured and the solubility coefficients are estimated. It is shown that, for both initial polymers, functionalization leads to a marked reduction in permeability (by a factor of 2–10) and diffusion coefficients (by a factor of 3–10); simultaneously, the separation factors increase by a factor of 2–6. Although for all gases the solubility coefficients decrease as a result of epoxidation, the coefficients of CO 2 solubility in both epoxidated polymers increase. This effect may be explained by specific interactions of a СО 2 molecule possessing the quadrupole moment with С–О–С bonds appearing in a polymer.
ISSN:1560-0904
1555-6123
DOI:10.1134/S1560090417050025