In this study

the process of photosensitization oxidation of poly (styrene-co-2

2

6

6 tetramethyl-4-piperidinylmethacrylate) and 2

2

6

6 tetramethyl-4-piperidinol were compared. It was shown that

the copolymer stated above can accumulated more quantity of stable free radical than another one under same condition.In the experiments of quenching effect for fluorescence of pyrene

the effect of copolymer is similar to the low molecular compound.