Star-branched and Hyperbranched Polyisobutylenes
The synthesis of branched (star-branched and hyperbranched) polyisobutylenes (PIBs) is described in this paper. Multiarm-star and brush-like structures were prepared by using a tert -hydroxy functionalized polystyrene macroinitiator (4-(l-hydroxy-l-methylethyl)styrene-co-styrene (HMESt-co-St). These polymers were characterized by SEC-light scattering. The first successful synthesis of gel-free high molecular weight hyperbranched PIBs was achieved by using HMESt as an inimer (initiator-monomer) in conjunction of living isobutylene (IB) polymerization. Initial characterization of the structure of this polymer included SEC analysis and selective destruction of the HMESt-junctions.
Puskas, Judit and Grasmüller, Martin, "Star-branched and Hyperbranched Polyisobutylenes" (1998). Chemical and Biomolecular Engineering Faculty Research. 573.