甲基咪唑甲酸盐离子液体中MMA的原子转移自由基聚合

“LIVING" RADICAL POLYMERIZATION OF METHYL METHACRYLATE IN[mim][HCOO] IONIC LIQUID SYSTEM

“Living" radical polymerization of methyl methacrylate was investigated using a new reaction system,ethyl 2-bromoisobutyrate/CuBr/[mim][HCOO]/MMA,in which [mim][HCOO] ionic liquid was a good solvent to CuBr.Polymerization of methyl methacrylate was carried out in [mim][HCOO] in the absence of any organic ligands.The polymerization mechanism belongs to an ATRP process.The polymerization was closely controlled and was a fast reaction when compared to polymerization in non-polar solvents in [mim][HCOO] at 50℃.The polymers were easily separated from the catalyst.Analysis of the PMMA for residual copper by atomic absorption spectrophotometer,shows a copper content of 3.80×10 -3 %(1% is expected, if no copper is removed).

＂Living＂ radical polymerization of methyl methacrylate was investigated using a new reaction system, ethyl 2-bromoisobutyrate/CuBr/[ mim] [ HCOO ]/MMA, in which [ mim] [ HCOO ] ionic liquid was a good solvent to CuBr. Polymerization of methyl methacrylate was carried out in [ mira ] [ HCOO ] in the absence of any organic ligands. The polymerization mechanism belongs to an ATRP process. The polymerization was closely controlled and was a fast reaction when compared to polymerization in non-polar solvents in [ mim] [ HCOO ] at 50℃. The polymers were easily separated from the catalyst. Analysis of the PMMA for residual copper by atomic absorption spectrophotometer, shows a copper content of 3.80 ×10^-3 % （ 1% is expected, if no copper is removed）.