Crosslinking of addition copolymers from tricyclononenes bearing (CH3)3Si‐ and (C2H5O)3Si‐groups as a modification of membrane gas separation materials

Here, we report the synthesis and the study of gas‐transport properties of crosslinked highly permeable copolymers from Si‐containing norbornene derivatives. The initial high‐molecular‐weight copolymers were prepared via addition copolymerization of 3‐trimethylsilyltricyclo[4.2.1.02,5]non‐7‐ene (TCN...

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Bibliographic Details
Published in:Polymer engineering and science 2019-12, Vol.59 (12), p.2502-2507
Main Authors: Alentiev, Dmitry A., Egorova, Elena S., Bermeshev, Maxim V., Starannikova, Ludmila E., Yampolskii, Yuri P., Finkelshtein, Eugene Sh
Format: Article
Language:English
Subjects:
Catalysts
Copolymerization
Copolymers
Crosslinking
Gas membrane separation
Gas separation
Gas transport
Gases
Methane
Organic chemistry
Permeability
Polymers
Selectivity
Silicon
Sol-gel processes
Transport properties
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Summary:Here, we report the synthesis and the study of gas‐transport properties of crosslinked highly permeable copolymers from Si‐containing norbornene derivatives. The initial high‐molecular‐weight copolymers were prepared via addition copolymerization of 3‐trimethylsilyltricyclo[4.2.1.02,5]non‐7‐ene (TCNSi1) with 3‐triethoxysilyltricyclo[4.2.1.02,5]non‐7‐ene (TCNSiOEt) in good or high yields using a Pd‐catalyst. The obtained copolymers included up to 10 mol% of TCNSiOEt units bearing reactive Si–O–C‐containing substituents. The crosslinking was readily realized by using simple sol–gel chemistry in the presence of Sn‐catalyst. The formed crosslinked copolymers were insoluble in common organic solvents. Permeability coefficients of various gases (He, H2, O2, N2, CO2, CH4, C2H6, C3H8, n‐C4H10) in these copolymers before and after crosslinking were determined and the influence of the incorporated TCNSiOEt units as well as the crosslinking on gas transport properties were established. As a result, it was found that only a small reduction of gas‐permeability was observed when TNCSiOEt units were incorporated into the main chains, and the copolymers were crosslinked. At the same time, the selectivity for C4H10/CH4 pair was increased. The suggested approach has allowed obtaining crosslinked polymers from Si‐containing monomers without a loss of the main membrane characteristics. POLYM. ENG. SCI., 59:2502–2507, 2019. © 2019 Society of Plastics Engineers
ISSN:0032-3888
1548-2634
DOI:10.1002/pen.25128