Micellisation of triblock copolymers of ethylene oxide and 1,2-butylene oxide: Effect of B-block length

► Triblock oxybutylene/oxyethylene copolymers (BEB) with long B-blocks have been synthesized. ► Micellisation in aqueous solution have been compared with that of diblock analogues. ► Effects seen on increasing B-block length are assigned to unimolecular micellisation.