THE INVESTIGATION OF OLIGOMERIC AZOMETHYN DYES REACTIVITY DURING RADICAL REACTIONS IN COMPARISON WITH THEIR INHIBITING ACTION AT PHOTOOXIDATION OF THE CELLULOSE-ACETATE

The kinetic data on the effective influence of oligometric dyes-azomet hyn compounds (AC) chain conjugation on the polymerization rate of sty rol have been obtained. Oligomeric AC reduce radical polymerization ra te more than in 10 times in comparison with low-molecular models havin g -C=N bonds. The reactivity of polyconjugated AC depends on delocaliz ation effeciency of pi-electrons along the chain of conjugation. It ha s been established that the inhibiting activity of dyes having ''carbo n-nitrogen'' double bonds rises with the increase of polymerization te mperature and concentration of oligomeric AC. The results of AC reacti vity in radical reactions are correlated in accordance with their ligh t-stabilization in radical processes of photooxidative destruction of cellulose acetate. The use of oligomeric dyes allows for the possibili ty to control of styrol radical polymerization.