- PII
- S30345545S0044461825070018-1
- DOI
- 10.7868/S3034554525070018
- Publication type
- Article
- Status
- Published
- Authors
- Volume/ Edition
- Volume 98 / Issue number 7-8
- Pages
- 412-424
- Abstract
- The review systematizes and analyzes the literature data on the effect of the structure of Si—O—C fragments in the side substituents of addition and metathesis polynorbornenes on their gas transport properties. The influence of the number and nature of alkoxysilyl groups, the length of alkyl and alkoxy fragments, the degree of branching of substituents, the presence of bridging and additional oxygen-containing or fluorine-containing groups is considered. It is shown that the variation of the structure of the organosilicon substituent makes it possible to purposefully change the gas permeability and selectivity of membranes, achieving an optimal combination of these parameters for the tasks of hydrocarbon separation and acid gas (CO, HS) recovery. Thus, the introduction of short alkoxy groups [tris(methoxy)silyl] leads to higher CO permeability and CO/N selectivity compared to polymers with longer substituents, and an increase in the number of oxygen-containing fragments in the substituents leads to an increase in selectivity due to a decrease in N permeability. The presence of fluorine-containing groups promotes an increase in CO solubility and, as a consequence, an increase in CO/CH selectivity. Special attention is paid to the identification of structure-property correlations and the definition of structures that provide high CO permeability while maintaining or increasing CO/N and CO/CH selectivity. The prospects for the use of such polymers for the creation of high-performance membranes and directions for further research are discussed.
- Keywords
- полинорборнены углекислый газ газоразделение мембраны газотранспортные свойства
- Date of publication
- 01.01.2026
- Year of publication
- 2026
- Number of purchasers
- 0
- Views
- 45
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