Atom transfer radical polymerization of methyl methacrylate in a novel ionic liquid and recycling of the catalyst
2008
Xiao, Guilin | Zhang, Haibo | Hong, Xinlin | Zhang, Gaoyong | Zhou, Xiaohai | Xia, Bilai
With 2,2'-bipyridine as the ligand and methyl 2-bromopropionate as the initiator, the copper-mediated atom transfer radical polymerization of methyl methacrylate was first conducted in a novel ionic liquid, N-butyl-N-methyl morpholinium tetrafluoroborate. The polymerization kinetics were confirmed to agree with the features of living/controlled free-radical polymerization. The results showed that the dosage of catalyst for well-controlled polymerization could be reduced obviously in N-butyl-N-methyl morpholinium tetrafluoroborate versus the normal organic solvent. The obtained polymers could be separated easily from the catalyst solution in the ionic liquid. Significantly, the recycled N-butyl-N-methyl morpholinium tetrafluoroborate solution of catalysts had catalytic activity similar to that of the fresh catalyst.
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