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Molecules 2017, 22(10), 1768;

Synthesis and Properties of MQ Copolymers: Current State of Knowledge

Enikolopov Institute of Synthetic Polymer Materials of Russian Academy of Sciences Profsoyuznaya st. 70, Moscow 117393, Russia
Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences Russia, Vavilova St., 28, GSP-1, V-334, Moscow 119991, Russia
Author to whom correspondence should be addressed.
Received: 21 September 2017 / Revised: 13 October 2017 / Accepted: 15 October 2017 / Published: 23 October 2017
(This article belongs to the Special Issue Progress in Silicon and Organosilicon Chemistry)
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In this review, we discuss currently available studies on the synthesis and properties of MQ copolymers. The data on methods of producing hydrolytic and heterofunctional polycondensation of functional organosilanes as well as the obtaining MQ copolymers based on silicic acids and nature silicates are considered. The ratio of M and Q monomers and the production method determine the structure of MQ copolymers and, accordingly, their physicochemical characteristics. It is shown that the most successful synthetic approach is a polycondensation of organoalkoxysilanes in the medium of anhydrous acetic acid, which reduces the differences in reactivity of M and Q monomers and leads to obtaining a product with uniform composition in all fractions, with full absence of residual alkoxy-groups. The current concept of MQ copolymers is that of organo-inorganic hybrid systems with nanosized crosslinked inorganic regions limited by triorganosilyl groups and containing residual hydroxyl groups. The systems can be considered as a peculiar molecular composites consisting of separate parts that play the role of a polymer matrix, a plasticizer, and a nanosized filler. View Full-Text
Keywords: organosiloxanes; MQ copolymers; MQ resin; polycondensation; hybrid organo-inorganic material organosiloxanes; MQ copolymers; MQ resin; polycondensation; hybrid organo-inorganic material

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Tatarinova, E.; Vasilenko, N.; Muzafarov, A. Synthesis and Properties of MQ Copolymers: Current State of Knowledge. Molecules 2017, 22, 1768.

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