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Use of a trichloromethyl-terminated azo initiator to synthesize block copolymers by consecutive conventional radical polymerization and ATRP

1999; Wiley; Volume: 20; Issue: 12 Linguagem: Inglês

10.1002/(sici)1521-3927(19991201)20

1521-3927

Mathias Destarac, Bernard Boutevin,

Carbon dioxide utilization in catalysis

A new two-step procedure for the preparation of block copolymers by a free radical process is proposed. A trichloromethyl-terminated azo initiator is synthesized and subsequently used to polymerize a first monomer, leading to a trichloromethyl-functionalized polymer. Secondly, the preformed polymer is used as a macroinitiator to initiate the atom transfer radical polymerization (ATRP) of a second monomer, to generate a block copolymer. The principle of this method is illustrated with butyl acrylate as the first monomer, and styrene for the ATRP step.