Accession Number:

AD1024655

Title:

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

Descriptive Note:

Technical Report,23 Nov 2016,13 Dec 2016

Corporate Author:

AIR FORCE RESEARCH LAB EDWARDS AFB CA EDWARDS AFB United States

Report Date:

2016-12-14

Pagination or Media Count:

54.0

Abstract:

Polyhedral Oligomeric Silsesquioxanes POSS are inorganicorganic 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 RSiO1.5n 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.

Subject Categories:

  • Polymer Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE