Va. Kraikin et al., THERMOSTABLE AND FIREPROOF HALOGEN-SUBSTITUTED POLY(DIPHENYLENEPHTHALIDES), Vysokomolekularnye soedinenia. Seria A, 40(9), 1998, pp. 1516-1521
Thermal stability and fire-retarding properties of halide-substituted
poly(diphenylenephthalides) were studied depending on the halogen type
and concentration. It was found that the concentration dependences of
the decomposition onset temperature in an inert medium, thermal stabi
lity in air, and oxygen index are described by curves with extrema. It
was established that the stabilizing effect of bromine introduced int
o the polymer chain exceeds the analogous action of chlorine. The yiel
d of coke as a function of the halogen content in a polymer was determ
ined and the corresponding correlation equations were derived. It is d
emonstrated that bromine- substituted poly(diphenylenephthalides) can
be used as additives inhibiting the thermooxidative degradation of pol
y(arylenephthalides).