EFFECT OF ULTRAVIOLET-LIGHT ON A RADIATION-CURED OLIGOMERIC COMPOSITION

The processes occurring in oligomeric systems under conditions of poly merization and accelerated aging induced by UV light were investigated using the method of IR spectroscopy. It was shown that photochemical degradation occurs primarily upon UV-light irradiation of cured epoxy acrylates at the ester groups and results in the formation of peroxyac ids. The principal possibility of introducing the stabilizer into the oligomeric composition at the radiation-curing stage was shown. The in troduction of benzon OA as a stabilizer is shown to reduce the rate of photodegradation.