Abstract
AbstractThe 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.
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