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A Study of the Polycondensation of (Tetrahydroxy)(Tetraaryl)Cyclotetrasiloxanes under Equilibrium and Non-Equilibrium Conditions in the Presence and Absence of Montmorillonite

A. N. Nesmeyanov Institute of Organoelement Compounds of the Russian Academy of Sciences, 28 Vavilov St., 119991 GSP-1 Moscow, Russia
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Polymers 2018, 10(4), 422; https://doi.org/10.3390/polym10040422
Received: 22 February 2018 / Revised: 30 March 2018 / Accepted: 3 April 2018 / Published: 9 April 2018
(This article belongs to the Special Issue Precision Polymer Synthesis)
Oligo- and polycyclosiloxanes were obtained by the polycondensation of (tetrahydroxy)(tetraaryl)cyclotetrasiloxanes in equilibrium and non-equilibrium conditions in the presence and absence of montmorillonite (MMT). Their composition and the structures of their components were investigated by infrared (IR) spectroscopy, 29Si nuclear magnetic resonance (NMR) spectroscopy, atmospheric pressure chemical ionization (APCI) mass spectrometry, powder X-ray diffraction (XRD), and gel-penetrating chromatography (GPC). Also, a comparison of polymers formed in the presence of MMT and via anionic polymerization was performed showing differences in their structures. View Full-Text
Keywords: polycondensation; equilibrium and non-equilibrium conditions; cyclolinear polyorganosilsesquioxanes; montmorillonite; cage-like compounds polycondensation; equilibrium and non-equilibrium conditions; cyclolinear polyorganosilsesquioxanes; montmorillonite; cage-like compounds
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Makarova, N.N.; Lyakhovetsky, Y.I.; Petrova, I.M.; Dolgushin, F.M.; Ikonnikov, N.S.; Peregudov, A.S.; Strelkova, T.V.; Klemenkova, Z.S. A Study of the Polycondensation of (Tetrahydroxy)(Tetraaryl)Cyclotetrasiloxanes under Equilibrium and Non-Equilibrium Conditions in the Presence and Absence of Montmorillonite. Polymers 2018, 10, 422.

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