1585296-70-3Relevant academic research and scientific papers
Silicon-containing trifunctional and tetrafunctional cyanate esters: Synthesis, cure kinetics, and network properties
Guenthner, Andrew J.,Vij, Vandana,Haddad, Timothy S.,Reams, Josiah T.,Lamison, Kevin R.,Sahagun, Christopher M.,Ramirez, Sean M.,Yandek, Gregory R.,Suri, Suresh C.,Mabry, Joseph M.
, p. 767 - 779 (2014/03/21)
The synthesis and physical properties of new silicon-containing polyfunctional cyanate ester monomers methyl[tris(4-cyanatophenyl)]silane and tetrakis(4-cyanatophenyl)silane, as well as polycyanurate networks formed from these monomers are reported. The higher crosslinking functionality compared to di(cyanate ester) monomers enables much higher ultimate glass transition temperatures to be obtained as a result of thermal cyclotrimerization. The ability to reach complete conversion is greatly enhanced by cocure of the new monomers with di(cyanate ester) monomers such as 1,1-bis(4-cyanatophenyl)ethane. The presence of silicon in these polycyanurate networks imparts improved resistance to rapid oxidation at elevated temperatures, resulting in char yields as high as 70% under nitrogen and 56% in air in the best-performing networks. The water uptake in the silicon-containing networks examined is 4-6 wt % after 96 h of immersion at 85°C, considerably higher than both carbon-containing and/or di(cyanate ester) analogs.
