Water Uptake Vs. Density and Conversion in Silicon Containing Cyanate Esters (Briefing Charts)
Abstract
A study was conducted which explored the density, percent water uptake by weight, and coefficient of thermal expansion as a function of conversion as measured by DSC in bis(4-cyanatophenyl)-dimethylsilane (SiMCy). The density of SiMCy was found to decrease with increasing conversion due to the formation of more free volume as the cyanurate networks cure, and this decline in density was found to be similar in magnitude to that of other cyanate ester resins which have been previously studied. The water uptake followed similar trends as compared to other cyanate esters in that it was similarly dependent on conversion, but did not correlate with the development of free volume except at high conversions (80%-100%). However, SiMCy did show a much lower percent water uptake as compared to other cyanate ester resins such as Bisphenol-E dicyanate (LECy). This data taken together would suggest that water has a much lower affinity for the cyanurate oxygens in SiMCy than in other cyanate esters.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 17, 2014
- Accession Number
- ADA620921
Entities
People
- Andrew J. Guenthner
- Jacob J. Zavala
- Joseph M Mabry
- Michael D. Ford
Organizations
- Air Force Research Laboratory