| 초록 |
Atom transfer radical polymerization(ATRP) is one of the most versatile controlled/”living” radical polymerization methods that allows for the preparation of polymeric materials with well-defined molecular weights. We have recently reported that the iron(II)-catalyzed ATRP of MMA with phosphorus-containing ligands were well-controlled and gave polymers with low PDI and molecular weights, which agreed with the theoretical values. The addition of iron(III)bromide to the ATRP at the beginning of the reaction improved the controllability. Furthermore we performed polymerization of styrene catalyzed by iron(III)/phosphorous ligands. The results showed that molecular weights matched the theoretical values better, and the molecular weight distributions were narrower. It means the iron(III)-catalyzed ATRP of styrene with phosphorous-containing ligands is better than the iron(II)-catalyzed ATRP. So we can say that our system is more advantageous than the lower oxidation state. |
