| Abstract
| - This study investigates the efficiency of a novel trifunctional alkoxyamine (1) based onN-tert-butyl-1-diethylphosphono-2,2-dimethylpropyl nitroxide (SG1) (2) as initiator for the controlledradical polymerization of styrene (S) and n-butyl acrylate (nBuA). Three factors, namely the concentrationof SG1 initially introduced in excess, the monomer conversion, andin the specific case of PS samplesthe monomer autopolymerization, were found to control the quality of the star samples obtained. Well-defined T-(PBuA-b-PS)3 star block copolymers could also be synthesized by sequential copolymerizationusing the same trifunctional initiator.
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