Study of the inhibition effect of stable iminoxy radicals on the oxidation degradation of polymers

The chemiluminescence method was used to study the reaction of peroxy radicals with stable radicals of X2NO. type where Corresponding courses of chemiluminescence intensity were followed either in low molecular solvents (ethyl benzene, dioxane) or in benzene solutions of polystyrene and in poly(ethylene oxide). The ratio ki/kt0.5 of rate constants of peroxy radicals and stable radicals recombination (ki) and mutual peroxy radicals termination (kt) was measured at 60°C. This value for ethyl benzene is 54.2 (1. mole−1 sec−1)0.5, for benzene 27.7 (1. mole−1 sec−1)0.5, and for 5% benzene solution of polystyrene 19.3 (1. mole−1 sec−1)0.5, respectively. Similar systems in dioxane and poly(ethylene oxide) exhibited different courses of chemiluminescence intensity than those in ethyl benzene and benzene.