Polymerization of isobutylene in the presence of ionic liquids

Polyisobutylenes (PIBs) with low molecular mass are widely used as additives for lubricants andfuels. In this article, the synthesis of this polymer from C۴ hydrocarbon streams (which is known asraffinite-۱) was carried out using AlCl۳-type acid Lewis initiator. In addition to AlCl۳, in order toreduce its consumption, the use of new ionic liquids was also considered. Microstructurecharacterization of synthetic polymers was done with GPC and HNMR tests. The results showed thatthe range of molecular weight in AlCl۳/ionic liquid complex increased and exo-olefin groupsdecreased. These results favor the synthesis of common grade polyisobutylene under more balancedtemperature conditions.

کلیدواژه ها:

Conventional polyisobutylene ، initiator/co-initiator complex ، ionic liquids.