The CuX/pentamethyldi-ethylenetriamine(PMDETA)catalyzed oxidative copolymerization of 2-(N

N-dimethylamino)ethyl methacrylate (DMAEMA) and methyl methacrylate (MMA) was investigated.The kinetics were compared by varying the monomer ratio

catalyst concentration and the reaction temperature.The results showed that the copolymerization could proceed under the monomer ratio (［DMAEMA］∶［MMA］=10∶0~5∶5)

catalyst concentration (［CuCl/PMDETA3］= 3.1×10-5 mol/L ~6×10-3 mol/L) and the reaction temperature (30~80℃) which were investigated in the paper

and the molecular weight increased with the reaction time

while the molecular weight distribution maintained rather broad.It was showed from the 1HNMR that there were DMAEMA units and MMA units in the copolymer

while the DSC indicated that the system of copolymer was partially compatible.The CuCl/PMDETA-catalyzed atom transfer radical polymerization (ATRP) of MMA using the so-obtained PDMAEMA as the macroinitiator was successful

confirming the presence of the C-Cl terminal functionality.Thus

the following mechanism might operate: 1) O2 oxidized CuCl into ［Cu(Ⅱ)Cl］+ species; 2) ［Cu(Ⅱ)Cl］+ oxidized dimethylamino moiety into N—CH2・radicals; 3) N—CH2・radicals and［Cu(Ⅱ)Cl］+ formed the reverse ATRP system.The above processes finally led to polymer with C—Cl end group.