Abstract

AbstractA comparative photodestruction study was carried out on solid state copolymers of styrene with methyl vinyl ketone, methyl isopropenyl ketone, phenyl vinyl ketone, benzalacetone and benzalacetophenone. The photolysis of the examined copolymers was found to proceed rapidly higher destruction rates being observed with increasing the ketone concentration. The rate of light‐induced destruction for the first three copolymers was markedly greater than that of the styrene‐benzalacetone and styrene‐benzalacetophenone copolymers. The photodestruction proceeds probably by the Norrish II mechanism.

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