Further Studies on Fire Retardant Polystyrene by Friedel-Crafts Chemistry.
Further Studies on Fire Retardant Polystyrene by
Friedel-Crafts Chemistry.
(592 K)
Wang, Z.; Jiang, D. D.; Wilkie, C. A.; Gilman, J. W.
Polymer Degradation and Stability, Vol. 66, 373-378,
1999.
Keywords:
polystyrene; fire retardants; calorimetry; crosslinking;
phosphate; styrene; cone calorimeters
Abstract:
The combination of a copolymer of 4-vinylbenzyl alcohol
and styrene with 2-ethylhexyldiphenylphosphate (DPP) and
with metal chlorides has been studied by TGA, radiative
gasification. Cone calorimetry, and oxygen index
measurements. Evidence is presented in support of a
cross-linking reaction with the additives and the
copolymer which proceeds through a Friedel-Crafts
mechanism. This approach reduces the peak heat release
rate (HRR) by 60% as measured in the Cone Calorimeter.
There is a significant reduction in the mass loss rate
during the thermal degradation and evidence of char
formation is observed in the radiative gasification
experiments.
Building and Fire Research Laboratory
National Institute of Standards and Technology
Gaithersburg, MD 20899