New catalysts for the synthesis of highly reactive polyisobutylene: chloroaluminate imidazole-based ionic liquids in the presence of diisopropyl ether

Abstract

The use of [emim]Cl–AlCl₃in combination withⁱPr₂O allowed the synthesis of HR PIB with high<italic>exo</italic>-olefin end group content (≥90%) and a relatively narrow MWD (Mw/Mn ≤ 2.0) at a high reaction temperature (&gt;0 °C) and monomer concentration (5.2 M–7.8 M).