Abstract
A synthetic route to frost-resistant siloxane rubbers is developed on the basis of the anionic block copolymerization of a mixture of cyclooctamethyltetrasiloxane, hexaethylcyclotrisiloxane, and 1,3,5,7-tetravinyl-1,3,5,7-tetramethylcyclotetrasiloxane in the presence of KOH. The resulting rubbers were used to produce frost-resistant elastomers. According to the results of DSC studies, the glass-transition temperature of the frost-resistant rubber is –129 °C; no crystallization or melting processes of the samples are detected on the thermograms. The elastomer obtained based on the siloxane rubber retains its operational characteristics even at the temperature as low as –123 °C.
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