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

摘要

The use of [emim]Cl-AlCl3 in combination with diisopropyl ether allowed us to synthesize highly reactive polyisobutylene with an exceptionally high exo-olefin end group content (>= 90%) and a relatively narrow molecular weight distribution (M-w/M-n <= 2.0) at a high reaction temperature (0 degrees C-10 degrees C) and monomer concentration ([IB] = 5.2 M-7.8 M).