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Polymerization Kinetics of Polysilazane by Transition Metal Catalyzed Dehydrocoupling Reaction.
SRI INTERNATIONAL MENLO PARK CA
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We have examined the polymerization kinetics of transition metal dehydrocoupling of the Si-H and N-H bonds of oligomers of the type HNMe-H2SiNMex-H by size exclusion chromatography and correlated molecular weight changes with changes in shear viscosity. Analysis using simplified statistical theory that branching is a mechanism for polymerization and lends to gelation. Keywords Polysilazanes Preceramic polymers, Bond activation catalysis Silanes, Ammonia Polymerization kinetics, Silicon , Hydrogen.
APPROVED FOR PUBLIC RELEASE