6-tetramethyl-4-piperidinyl methacryla-te (MTMP) and the factors influencing this copolymerization system were studied. It was observed that by the use of azo-type initiators (AIBN
ABVN) the copolymerization reaction proeees smoothly
but BPO can not initiate this copolymerization. The St-MTMP copolymer has good heat stability and is soluble in common organic solvents. The copolymer was proved to benon-toxic in animal tests. The structure and properties of the St-MTMP copolymer were characterized by IR