Polymerization of methyl methacrylate by charge-transfer mechanism with 2,2?-bipyridine and iron (III) complex

Goswami

2002

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ABSTRACT:The living/controlled radical polymerization of stearyl methacrylate was carried out with a conventional radical initiator (2,2Ј-azobisisobutyronitrile) in N,Ndimethylformamide in the presence of a 2,2Ј-bipyridine complex of hexakis(N,N-dimethylformamide)iron(III) perchlorate. The polymerization mechanism was thought to proceed through a reverse atom transfer radical polymerization. The molecular weights of resulting poly(stearyl methacrylate) increased with conversion, and the resulting molecular weight distributions were quite narrow. The rates of polymerization exhibited first-order kinetics with respect to the monomer. A probable reaction mechanism for the polymerization system is postulated to explain the observed results.

Reverse atom transfer radical polymerization of stearyl methacrylate using 2,2′‐azobisisobutyronitrile as the initiator

Goswami

2002

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Transition metal‐catalyzed atom transfer radical polymerization of stearyl methacrylate in the presence of carbon tetrabromide and a conventional radical initiator

Goswami

2002

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Atom transfer radical polymerization of stearyl methacrylate (SMA) was successfully carried out in N,N-dimethylformamide using the carbon tetrabromide/ Fe(III)/2,2Ј-bipyridine initiator system in the presence of 2,2Ј-azobisisobutyronitrile (AIBN) as the source of the reducing agent to maintain the equilibrium between growing radicals and dormant species. The molecular weights of the resulting poly(stearyl methacrylate) (PSMA) increased with the conversion and the molecular weight distribution of PSMA was quite narrow. The rates of polymerization exhibit first-order kinetics with respect to the monomer. A probable reaction mechanism for the polymerization system was postulated to explain the observed results. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 86: 386 -394, 2002

Kinetic study of the atom transfer radical polymerization of n‐docosyl acrylate

Dass

2005

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ABSTRACT:The atom transfer radical polymerization (ATRP) of n-docosyl acrylate (DA) was studied at 80°C in N,N-dimethylformamide using the carbon tetrabromide/ FeCl 3 /2,2Ј-bipyridine (bpy) initiator system in the presence of 2,2Ј-azobisisobutyronitrile (AIBN) as the source of reducing agent. The rate of polymerization exhibits first-order kinetics with respect to the monomer. The linear relationship between the molecular weight of the resulting poly(n-docosyl acrylate) with conversion and the narrow polydispersity of the polymers indicates the living characteristics of the polymerization reaction. The significant effect of AIBN on the ATRP of DA was studied keeping [FeCl 3 ]/[bpy] constant. A probable reaction mechanism for the polymerization system is postulated to explain the observed results.