| abstract |
Silazane polymers are prepared by (1) reacting ammonia with one or more halogenated organic silicon compounds containing an Si-H bond to produce a silazane ammonolysis product, (2) mixing the ammonolysis product with 0.1% to 30% by weight of an organic amide or thioamide, and (3) heating to a temperature of 30° to 300° C. Silazane polymers containing alkenyl or alkynyl groups can be cured by supplying energy to generate free radicals. The cured or uncured polymers can be pyrolyzed to produce silicon nitride-containing ceramic materials. |