Highly reactive polyisobutylenes with a desirable low Mn were obtained with RAlCl2 × OiPr2 initiating systems with high monomer concentrations at room temperature.
Medium molecular weight polyisobutylenes (∼35 000 g mol−1) with exo-olefin end groups (>80%) can be obtained by cationic polymerization of isobutylene in toluene using iBu2AlCl or iBuAlCl2·nOR2 (n = 0.6–0.8) as co-initiators.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.