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Synthesis of 1,1,3,3,5,5-Hexamethyl-7,7-diorganocyclotetrasiloxanes and Its Copolymers
This paper reports a method for the synthesis of 1,1,3,3,5,5-hexamethyl-7,7-diorganocyclotetrasiloxanes by the interaction of 1,5-disodiumoxyhexamethylsiloxane with dichlorodiorganosilanes such as methyl-, methylvinyl-, methylphenyl-, diphenyl- and diethyl dichlorosilanes. Depending on the reaction...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8747541/ https://www.ncbi.nlm.nih.gov/pubmed/35012055 http://dx.doi.org/10.3390/polym14010028 |
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author | Talalaeva, Evgeniya V. Kalinina, Aleksandra A. Chernov, Evgeniy V. Khmelnitskaia, Alina G. Obrezkova, Marina A. Cherkaev, Georgii V. Muzafarov, Aziz M. |
author_facet | Talalaeva, Evgeniya V. Kalinina, Aleksandra A. Chernov, Evgeniy V. Khmelnitskaia, Alina G. Obrezkova, Marina A. Cherkaev, Georgii V. Muzafarov, Aziz M. |
author_sort | Talalaeva, Evgeniya V. |
collection | PubMed |
description | This paper reports a method for the synthesis of 1,1,3,3,5,5-hexamethyl-7,7-diorganocyclotetrasiloxanes by the interaction of 1,5-disodiumoxyhexamethylsiloxane with dichlorodiorganosilanes such as methyl-, methylvinyl-, methylphenyl-, diphenyl- and diethyl dichlorosilanes. Depending on the reaction conditions, the preparative yield of the target cyclotetrasiloxanes is 55–75%. Along with mixed cyclotetrasiloxanes, the proposed method leads to the formation of polymers with regular alternation of diorganosylil and dimethylsylil units. For example, in the case of dichlorodiethylsilane, 70% content of linear poly(diethyl)dimethylsiloxanes with regular alternation of units can be achieved in the reaction product. Using 7,7-diethyl-1,1,3,3,5,5-hexamethylcyclotetrasiloxane as an example, the prospects of the mixed cycle in copolymer preparation in comparison with the copolymerization of octamethyl- and octaethylcyclotetrasiloxanes are shown. |
format | Online Article Text |
id | pubmed-8747541 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-87475412022-01-11 Synthesis of 1,1,3,3,5,5-Hexamethyl-7,7-diorganocyclotetrasiloxanes and Its Copolymers Talalaeva, Evgeniya V. Kalinina, Aleksandra A. Chernov, Evgeniy V. Khmelnitskaia, Alina G. Obrezkova, Marina A. Cherkaev, Georgii V. Muzafarov, Aziz M. Polymers (Basel) Article This paper reports a method for the synthesis of 1,1,3,3,5,5-hexamethyl-7,7-diorganocyclotetrasiloxanes by the interaction of 1,5-disodiumoxyhexamethylsiloxane with dichlorodiorganosilanes such as methyl-, methylvinyl-, methylphenyl-, diphenyl- and diethyl dichlorosilanes. Depending on the reaction conditions, the preparative yield of the target cyclotetrasiloxanes is 55–75%. Along with mixed cyclotetrasiloxanes, the proposed method leads to the formation of polymers with regular alternation of diorganosylil and dimethylsylil units. For example, in the case of dichlorodiethylsilane, 70% content of linear poly(diethyl)dimethylsiloxanes with regular alternation of units can be achieved in the reaction product. Using 7,7-diethyl-1,1,3,3,5,5-hexamethylcyclotetrasiloxane as an example, the prospects of the mixed cycle in copolymer preparation in comparison with the copolymerization of octamethyl- and octaethylcyclotetrasiloxanes are shown. MDPI 2021-12-22 /pmc/articles/PMC8747541/ /pubmed/35012055 http://dx.doi.org/10.3390/polym14010028 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Talalaeva, Evgeniya V. Kalinina, Aleksandra A. Chernov, Evgeniy V. Khmelnitskaia, Alina G. Obrezkova, Marina A. Cherkaev, Georgii V. Muzafarov, Aziz M. Synthesis of 1,1,3,3,5,5-Hexamethyl-7,7-diorganocyclotetrasiloxanes and Its Copolymers |
title | Synthesis of 1,1,3,3,5,5-Hexamethyl-7,7-diorganocyclotetrasiloxanes and Its Copolymers |
title_full | Synthesis of 1,1,3,3,5,5-Hexamethyl-7,7-diorganocyclotetrasiloxanes and Its Copolymers |
title_fullStr | Synthesis of 1,1,3,3,5,5-Hexamethyl-7,7-diorganocyclotetrasiloxanes and Its Copolymers |
title_full_unstemmed | Synthesis of 1,1,3,3,5,5-Hexamethyl-7,7-diorganocyclotetrasiloxanes and Its Copolymers |
title_short | Synthesis of 1,1,3,3,5,5-Hexamethyl-7,7-diorganocyclotetrasiloxanes and Its Copolymers |
title_sort | synthesis of 1,1,3,3,5,5-hexamethyl-7,7-diorganocyclotetrasiloxanes and its copolymers |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8747541/ https://www.ncbi.nlm.nih.gov/pubmed/35012055 http://dx.doi.org/10.3390/polym14010028 |
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