Radical thermo- and sonopolymerization of methyl methacrylate initiated by iodobenzene 1,1-diacetate
Abstract:The efficiency of iodobenzene 1,1-diacetate or (diacetoxyiodo)benzene (DAIB) as a thermo- and sono-initiator of methyl methacrylate (MMA) in radical bulk polymerization is tested. The polymerization kinetics and molecular-mass characteristics support an assumption for a combined polymerization mechanism including a classical bimolecular termination with chain transfer reaction and iniferter quasi-living polymerization. In addition to the equilibrium formation and degradation of the ‘dormant’ polymer ends, other possible decomposition reactions of the hypervalent iodine bond are the probable reason for the deviation of this polymerization from the iniferter polymerization mechanism. These reactions bear some similarity to the two-step addition–fragmentation chain transfer mechanism of controlled radical polymerization. The application of the poly(MMA) obtained as a macroinitiator is evidence of ‘dormant’ chain end formation.
© 2001 Society of Chemical Industry
Document Type: Research Article
Publication date: March 1, 2001
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