Peroxide-substituted polysilazanes

Details Peroxide-substituted polysilazanes Peroxide-substituted polysilazanes

C - Chemistry, Metallurgy

08

G

C08G 77/62 (2006.01) C04B 35/571 (2006.01) C04B 35/58 (2006.01) C04B 35/589 (2006.01) C08L 83/16 (2006.01)

Patent

CA 2079990

The preparation of an uncrosslinked polysilazane containing chemically bound peroxide groups by reacting a polysilazane and a hydroperoxide at a temperature below the decomposition temperature of the hydroperoxide is disclosed. A thermoset polymer is formed by heating a peroxide- substituted silazane that is also substituted by alkenyl groups or alkynyl groups. The chemically bound peroxide decomposes to yield a free radical, thereby initiating crosslinking of the unsaturated groups. The peroxide- substituted polysilazanes can be pyrolyzed to form ceramic articles.

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