Chain extension of P(EB)-macro- RAFT MWmacro-RAFT=4000 g/mol [Styrene]=[maleic anhydride]=1M Reaction temperature: 85 ْC Initiator: Vazo 88 [RAFT]/[Vazo 88]=10 Solvent: MEK/Toluene (2/1) Predictable MW and linear increase of Mn with conversion Final conversion=93% PDI macro-RAFT=1.03 PDI final product=1.15