The Preparation and Properties of meta-Carborane—Siloxane Elastomers

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Abstract
A new synthesis of D2-carborane—siloxanes is described which overcomes many of the disadvantages of previous synthetic methods. Linear polymers with molecular weights up to 250,000 can now be prepared using silanol-silylurea condensation reactions. Elastomers with useful general properties and good retention of mechanical properties after heat aging in air at 315°C for 300 hr were produced. The property profile and ease of vulcanization suggest utility in high-performance sealant, gasket, O-ring, and coating applications.

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