Living Radical Polymerization of N,N-Dimethylacrylamide with RuCl2(PPh3)3-Based Initiating Systems

Living Radical Polymerization of N,N-Dimethylacrylamide with RuCl2(PPh3)3-Based Initiating Systems

N,N-Dimethylacrylamide (DMAA) was radically polymerized with RuCl2(PPh3)3 in conjunction with an alkyl halide (R−X; X = Br, Cl) as an initiator in the presence of Al(Oi-Pr)3 in toluene at 60−80 °C, where the polymerizations were much faster than that of methacrylates. Specifically with bromides as i...

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Veröffentlicht in:Macromolecules 1999-11, Vol.32 (24), p.8005-8009
Hauptverfasser: Senoo, Masahide, Kotani, Yuzo, Kamigaito, Masami, Sawamoto, Mitsuo
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creator Senoo, Masahide
Kotani, Yuzo
Kamigaito, Masami
Sawamoto, Mitsuo
description N,N-Dimethylacrylamide (DMAA) was radically polymerized with RuCl2(PPh3)3 in conjunction with an alkyl halide (R−X; X = Br, Cl) as an initiator in the presence of Al(Oi-Pr)3 in toluene at 60−80 °C, where the polymerizations were much faster than that of methacrylates. Specifically with bromides as initiators [CCl3Br, CH3CH(CONMe2)Br, (CH3)2C(CONMe2)Br, and (CH3)2C(CO2Et)Br], the Ru(II) complex induced living radical polymerization of DMAA to give polymers with controlled molecular weights and relatively narrow molecular weight distributions (M̄ w/M̄ n ∼ 1.6). Similar living polymerizations were also possible for N,N-diethylacrylamide. 1H NMR analysis of the obtained polymers showed that the polymerization proceeds via activation of the C−Br terminal originating from the bromide initiators by the ruthenium complex.
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title Living Radical Polymerization of N,N-Dimethylacrylamide with RuCl2(PPh3)3-Based Initiating Systems
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