Polymerization Kinetics of Polysilazane by Transition Metal Catalyzed Dehydrocoupling Reaction.

Abstract

We have examined the polymerization kinetics of transition metal dehydrocoupling of the Si-H and N-H bonds of oligomers of the type HNMe-(H2SiNMe)x-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.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1987
Accession Number
ADA183448

Entities

People

  • Andrea W. Chow
  • Richard D. Hamlin
  • Richard M Laine
  • Yigal Blum

Organizations

  • SRI International

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Catalysts
  • Ceramic Materials
  • Chemical Kinetics
  • Chemistry
  • Contracts
  • Materials Processing
  • Materials Science
  • Measurement
  • Military Research
  • Molecular Weight
  • Polymer Chemistry
  • Polymers
  • Reaction Time
  • Security
  • Silicon
  • Silicon Carbide
  • Transition Metals

Fields of Study

  • Chemistry

Readers

  • Electrochemical Engineering/ Fuel Cell Technologies
  • Polymer Science and Technology