HYPOTHESIS OF SILOXANE DEGRADATION OF HIGH TEMPERATURE AND THE EFFECT OF CERIUM-BASED INHIBITOR,

Abstract

The cerium-based inhibitor for extending gelation times of commercial silicones is considered from the standpoint of the relatively fixed proportions of reactants necessary for optimum stabilization. A connection is made between these fixed proportions and the hydride/silanol content of the commercial silicone itself. The release of H2O by the high-temperature condensation of silanol groups does not lead to the simple evolution of H2O vapor but rather to a rapid catalytic attack by H2O on the siloxane chain. The beneficial effects of the cerium inhibitor can be rationalized in terms of eliminating the source of high-temperature H2O evolution. (Author)

Document Details

Document Type
Technical Report
Publication Date
Mar 13, 1969
Accession Number
AD0685635

Entities

People

  • A. D. Britt
  • W. B. Moniz

Organizations

  • United States Naval Research Laboratory

Tags

DTIC Thesaurus Topics

  • Condensation
  • Critical Temperature
  • Degradation
  • Gelation
  • Glass Transition Temperature
  • High Temperature
  • Inhibitors
  • Isothermal Processes
  • Personal Information Managers
  • Phase Transformations
  • Transition Temperature

Readers

  • Library and Information Science/ Studies, Southeast Asia Studies, Bibliography of Vietnam and Lao Studies.
  • Polymer Science and Engineering.
  • Regression Analysis.