Phenylethynyl Silsesquioxanes: Monomer Synthesis, Characterization,Thermolysis and Thermal Properties

Abstract

Polyhedral Oligomeric Silsesquioxanes (POSS) are inorganic/organic cages that are used as high-tech additives to enhance the thermal, mechanical and surface properties of many polymeric systems. A useful analogy is that a POSS is nano-sized particle of silica solubilzed with organic modifiers (RSiO1.5)n; the organic periphery determines how well the POSS can interact with any host polymer, while the siliceous core adds thermoxidative stability. Beginning in 1993 and continuing today, there has been extensive research in understanding how POSS incorporation into various materials affects polymer properties. Herein is reported a synthesis strategy to produce POSS-containing, thermosetting phenylethynyls to yield high temperature materials with extreme thermo-oxidative stability, low moisture uptake and good mechanical properties.

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Document Details

Document Type
Technical Report
Publication Date
Dec 14, 2016
Accession Number
AD1024655

Entities

People

  • Andrew J. Guenthner
  • Gregory R. Yandek
  • Jacob J. Zavala
  • Jason T. Lamb
  • Joseph M Mabry
  • Josiah T. Reams
  • Kamran B Ghiassi
  • Timothy S. Haddad

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Air Force Research Laboratories
  • Boundaries
  • Composite Materials
  • Glass
  • Glass Transition Temperature
  • High Temperature
  • Materials
  • Mechanical Properties
  • Military Research
  • Moisture
  • Oligomers
  • Surface Properties
  • Thermal Properties
  • Thermal Stability
  • Transition Temperature
  • Viscosity

Fields of Study

  • Materials science

Readers

  • Polymer Science and Engineering.
  • Polymer Science and Technology
  • Systems Analysis and Design