Macromolecular Design and Synthesis of Polymers from Silicon- Containing Norbornenes for Membrane Gas Separation

Abstract

The present review highlights recent approaches to the synthesis of highly permeable polymers by metathesis and addition polymerization of silicon-containing norbornenes. The main focus is on the authors' own works that utilize Me 3 Sisubstituted exo-tricyclononenes as highly reactive norbornenetype monomers for polymerization. The basic relationships between polymer structures and their gas permeability characteristics are considered. The possibility of tuning the gas transport properties of polymers (permeability and selectivity) by modification of their structures is shown. (M. V.Bermeshev)

The selective hydrosilylation of norbornadiene-2,5 by monohydrosiloxanes

“…16,17 To overcome this disadvantage, the [2s + 2s + 2p]-cycloaddition of vinylsilanes with quadricyclane was realized (Scheme 1b). 18 This selectively gives the exo-isomer, but only "activated" vinylsilanes (which contain chlorine atoms at silicon) were active in this reaction. [19][20][21][22] This limits the scope of the reaction.…”

Chromatographic Method for Evaluation of Polymeric GC Stationary Phases Ageing Using the Novel Non-Cross-Linked Poly(3-(Tributoxysilyl)Tricyclononene-7) as the Model Stationary Phase

“…Russia). Poly(3-(tributoxysilyl)tricyclononene-7) (PTBSN, structure V, Figure 2 ) was prepared according to methodology described in [ 15 ] (Scheme 4), [ 16 ] via ring opening metathesis polymerization using WCl 6 in toluene catalyst in Institute of Petrochemical Synthesis, RAS, and was used as is. The primary investigation of properties showed that in GC separation conditions PTBSN had to be in visco-elastic state, as the glass transition temperature of this polymer was −32 °C (241 K).…”