Structure and Properties of Poly(1-trimethylsilyl-1-propyne) Synthesized Using NbF5- and TaF5-Containing Catalytic Systems

The polymerization of 1-trimethylsilyl-1-propyne mediated by catalytic systems based on Nb and Ta pentafluorides is carried out. Using solid-state 13 С NMR spectroscopy, it is shown that the catalysts based on group V metal fluorides possess a well-defined trans-stereoregulating ability and produce...

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Bibliographic Details
Published in:Polymer science. Series B 2021-03, Vol.63 (2), p.85-93
Main Authors: Kossov, A. A., Levin, I. S., Zhilyaeva, N. A., Litvinova, E. G., Khotimskiy, V. S., Matson, S. M.
Format: Article
Language:English
Subjects:
Argon
Bromides
Chemical synthesis
Chemistry
Chemistry and Materials Science
Fluorides
Low temperature
Metal fluorides
Niobium
NMR spectroscopy
Organic compounds
Polymer Sciences
Polymerization
Polymers
Sorbents
Sorption
Tantalum
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Summary:The polymerization of 1-trimethylsilyl-1-propyne mediated by catalytic systems based on Nb and Ta pentafluorides is carried out. Using solid-state 13 С NMR spectroscopy, it is shown that the catalysts based on group V metal fluorides possess a well-defined trans-stereoregulating ability and produce trans-enriched polymers compared with analogous samples synthesized using Nb and Ta chlorides and bromides since they have a smaller ligand at the active center of the growing chain. A high trans-stereoregularity of poly(1-trimethylsilyl-1-propyne) is responsible for its insolubility in organic solvents. As evidenced by low-temperature argon sorption, all the synthesized polymers have high BET specific surface area (above 600 m 2 /g) and micropore volume (above 0.30–0.45 cm 3 /g). In combination with resistance against organic compounds, this makes them attractive materials for use as fillers of composite membranes and sorbents for the sorption of gases and vapors of organic compounds from streams of commercial mixtures of various composition.
ISSN:1560-0904
1555-6123
DOI:10.1134/S1560090421020068