Polymerization of methyl methacrylate with transition metal‐methylaluminoxane catalysts

Polymerization of methyl methacrylate with Ni(acac)2-methylaluminoxane catalyst

“…10 Among Mt(acac) x , Ni(acac) 2 appears to be a versatile catalytic system. It is able to initiate the polymerizations of various monomers such as styrene (St), butadiene (Bd) and isoprene (IP).…”

Emprego de catalisadores à base de níquel para homo- e copolimerização de estireno

“…Uma das principais características do acetilacetonato de níquel é sua capacidade de polimerizar monômeros acrílicos 49,50 e copolimerizar estireno com metacrilato de metila 51 sem perda de atividade catalítica. O copolímero de estireno com metacrilato de metila é de baixo peso molecular 51 e o teor de metacrilato de metila incorporado no copolímero permanece constante até 50% desse monômero na alimentação, com significativo aumento após essa concentração (Figura 9).…”

Polymerization of n-butyl methylacrylate using bis(β- ketoamino)nickel(II)/MAO catalytic systems

“…As is well known, late transition metal complexes are generally considered to be more tolerant toward polar media and polar functional groups due to their less oxophilic nature relative to early transition metal complexes, which make them attractive candidates for the development of catalysts for polar monomer polymerizations. Since Ni(acac) 2 -MAO catalyst system was first found to be an effective catalyst for the aspecific polymerization of MMA [21], the Ni(II)-based and Pd(II)-based late transition metals catalysts are of particular interest in polymerization of polar monomers, such as acrylate (A), methacrylate (MA) methyl methacrylate (MMA), and tert-butyl methacrylate (tBMA). And different nickel complexes combined with methylaluminoxane (MAO) or modified methylalumin-oxane (MMAO) have been investigated to be used as the catalysts for insertion polymerization of alkyl acrylates [22][23][24][25].…”