Reverse ATRP of MMA Catalyzed by AIBN/SmCl3/Lactic Acid System

Abstract

Abstract: Reverse ATRP of methyl methacrylate(MMA) mediated by AIBN/SmCl₃/lactic acid system was investigated.The one electron transfer reaction of SmCl₃ to SmCl₂ was firstly employed for living/controlled radical polymerization successfully.The kinetics study indicates that the polymerization is first order in monomer concentration.Moreover,the number average molecular weight(M-n) increased linearly with the monomer conversion,and the molecular weight distributions were narrower(less than 1.5).These show that the polymerization of MMA is a living/controlled one in the above system.The effects of different reaction conditions,such as solvent sort,temperature and ratio of ₀/₀/₀,on the polymerization were studied.PMMA with narrower molecular weight distribution were obtained in DMF at 80℃.Furthermore,the apparent activation energy E-app=74.1 kJ/mol was calculated for the reverse ATRP of MMA initiated by AIBN/SmCl₃/lactic acid.

Key words: Reverse ATRP, MMA, SmCl₃, Lactic acid, Living/controlled radical polymerization

CLC Number:

O631

TrendMD:

XIONG Yu-Bing, FAN Ling, SHEN Zhi-Quan. Reverse ATRP of MMA Catalyzed by AIBN/SmCl₃/Lactic Acid System[J]. Chem. J. Chinese Universities, 2005, 26(11): 2153.

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Reverse ATRP of MMA Catalyzed by AIBN/SmCl₃/Lactic Acid System

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