Further Studies on Fire Retardant Polystyrene by Friedel-Crafts Chemistry.
Further Studies on Fire Retardant Polystyrene by
Wang, Z.; Jiang, D. D.; Wilkie, C. A.; Gilman, J. W.
Polymer Degradation and Stability, Vol. 66, 373-378,
polystyrene; fire retardants; calorimetry; crosslinking;
phosphate; styrene; cone calorimeters
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