Phenolic Cyanate Ester Clay Nanocomposites: Effect of Ammonium Ion Structure on Flammability and Nano-Dispersion.
Phenolic Cyanate Ester Clay Nanocomposites: Effect of
Ammonium Ion Structure on Flammability and
Gilman, J. W.; Harris, R. H., Jr.; Jackson, C. L.;
Morgan, A. B.; Brassell, L. D.; Hunter, D. L.
Polymeric Materials: Science and Engineering (PMSE).
Spring Meeting. Volume 82. Proceedings. American
Chemical Society (ASME). March 26-30, 2000, San
Francisco, CA, American Chemical Society, Washington,
DC, 276-277 pp, 2000.
nanocomposites; clay; flammability; flammability
testing; heat release rate; ammonium
We have recently found that polymer clay nanocomposites
have reduced flammability. This is particularly
significant since reduced polymer flammability using
additives is often done at the expense of physical
properties. We report here on the use of montmorillonite
(MMT) dispersed at the nanometer level, in phenolic
cyanate ester (CE) resins for reducing flammability. We
show that the use of alkylammonium-treated MMT in these
resins reduces the peak heat release rate (HRR) by over
50 %. We will also show that the ammonium treatment used
to compatibilize the clay with the matrix can
dramatically alter the nano-dispersion and the
flammability properties. Specifically, we will report on
two methods used to **tether** the clay to the cured
phenolic triazine matrix.